Xiegu XPA125B Ham Radio Amplifier

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Testing out the amp's power output and antenna tuner.
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Be sure and subscribe to these great channels:
Ham Radio 2.0: / hamradio20
Ham Radio Crash Course: / hoshnasi
KG6HQD: / @kg6hqdjerrysota
N0SSC: / n0ssc
K6UDA Radio: / k6uda
K8MRD Radio Stuff: / k8mrdradiostuff
Signal Search: / channel
Ham Radio Now: / hamradionow
Kyle - AA0Z: / kyleaa0z
SevenForty1: / sevenforty1
100 Watts and a Wire Podcast: 100wattsandawire.com
DX Commander: / m0mcx
W6RIP Radio Adventures: / 11dayscrape
The Smokin Ape: / thesmokinape
Goodgame Ham Radio, Bees, and Outdoors: / goodgamehamradiobeesou...
Temporarily Offline: / temporarilyoffline

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8 июл 2020

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Комментарии : 189

@DaninVirginia 3 года назад

Really really appreciate the details on connections cabling etc, really makes the vid more useful, thanks man

@hamradiotube 3 года назад

Glad you enjoyed it. I try to show as much as I can think of because I always wanted to see every little detail on videos myself.

@W6IWN_Radio Год назад

Thanks for taking the time to make this very detailed video. 👍👍

@DickBurke2010 Год назад

Mike, first let me introduce myself my call is N2T0Y and I have been a ham for 30 years. I started and VHF and UHF and got involved with the national traffic system while I was in Rochester NY. I moved to Colorado and found the amateur radio crowd was not open to outsiders. As a result I dropped my interest in radio until about two years ago when I acquired Baefeng Radios until I graduated to DMR. I really never found a lot of interest in those bands and hesitated to get into HF. My son Andy, NF2L, enjoys working with QRP radios in the HF bands and he finally talked me into joining the HF crowd. I would like to express my great appreciation for the videos on RU-vid that you have done and the Xiegu X6100 andXPA125B amplifier. I could not get the radio and the amplifier to work correctly and was just stymied but I watched your video on the amplifier and it explained what I was doing wrong. Thank you, thank you, thank you. I am currently 76 years old, I'm a disabled veteran, I am confined to a wheelchair and so doing homework is not an easy task. Takes me a lot longer but sooner or later it'll get done. Hope you and your family are doing well and that the year is being nice to you, 73, Dick

@MoJo9919 3 года назад

Hi Mike My amplifier just arrived via a slow boat from China ( 9 weeks ) and nearly 2X the USA price and I was having loads of Problems setting it up ie the instructions supplied and one from the Net did not match ? Then along came you with a very detailed video . I am very great full for that as I think I can now move on and use it, always enjoy your contributions keep me coming THANKS

@hamradiotube 3 года назад

Jeez that slow boat was really going slow huh? The instructions should just be thrown in the trash I think. Glad you found the video helpful. Thats always my goal. Hope you are getting on the air with it now. 73

@tangoseal1 3 года назад

I just bought one right now as of this time stamp. Gonna pair it up with my Icom 705 QRP. Finally a real powerful amplifier for field ops. Wow! Before we would have had to build something bulky but the Chicoms have figured it out. Wish I could have gotten MFjs pricing at 459 but they are sold out so I got it from HRO at 520.

@hamradiotube 3 года назад

Right on. We tried to hook up this amp to a 705 for winter field day with no luck. Hopefully you are able to figure it out. Too bad you had to pay more money for it though.

@don_n5skt 4 года назад

Great Video Mike. I know I haven't seen it yet but I already know it's good ;)

@hamradiotube 4 года назад

Thanks Don

@angelhelp6819 4 года назад

Hi I just received my linear amplifier I'm it's came to day from China. Xiegu xpa 125b it's waiting so long to come 👍☀️ and also I like it's very excellent video nice keep making more

@hamradiotube 3 года назад

Right on, glad to hear.

@EdwardGriffin 4 года назад

It's a good video demonstrating the option of using an external amp with a QRP radio for those who want to operate full power at home, and have the option of QRO or QRP in the field. If a person's budget limits this to being their only option for doing that, then it certainly is better than doing without but it's not "the best of both worlds" in the sense of the best home radio, and the best portable radio. The Chinese radios have a ways to go before they approach the state of the art in amateur equipment today. If cost of amateur gear is a gateway that's keeping people out of the hobby, then I'm all for lower cost options that will allow more people to participate. It's important that this gear operate within specs concerning spectral purity and harmonic suppression. What might be fine at low power may not be when amplified, and could be detrimental to other operators.

@hamradiotube 4 года назад

I think the Chinese are giving Japan a run for their money with some of this HF stuff. It may not be up to the same quality yet, but they are certainly filling a gap in price that the "Big 3" are almost ignoring. I'll be filming a video on the spectral purity of this amp tomorrow so stay tuned for that.

@theElderberryFarmer 4 года назад

Thanks for this, Mike. Although I've not had much trouble getting out with just 20 watts, I'm toying with the idea of having more power than my G90 provides. Xiegu's amplifier looks like a good choice - but so does just buying a Yaesu 891. Granted, Xiegu's internal ATU's rock - but since I'm using a home-brew version of the DX Commander All Band Vertical antenna, I can live without a tuner. I like the idea of a 100 watt rig to use at home without taking up much desk space, and having a separate portable 20 watt to take on the road with me. Decisions, decisions - life is rough, eh? LOL

@hamradiotube 4 года назад

Thank you for watching Dwight. I haven't had much trouble getting out w/the G90 either. If you don't need a tuner I'd say the 891 wins hands down. But if you're like me and like to play with different antennas, this might be an option too. This combo would allow you to do both.

@cobrasvt347 4 года назад

10:02 funniest thing I’ve seen all day. Thanks 😊

@hamradiotube 4 года назад

More watts reflected is always a good thing right lol!!

@1polonium210 3 года назад

Very good review!

@hamradiotube 3 года назад

Glad you enjoyed it

@elvinpena8788 3 года назад

Hi Gary, the auto-tuner is full-auto controlled by the G90/5105 radios when you do a quick tune/sync/pair procedure with the xiegu 5105/g90 radios, after sync-tune it will switch bands and tune automatically with said radios. 1.) plug everything up 2.) power everything up 3.) Set radio xiegu 5105/g90 power out to 5w (according to the manual): I also have the g90 antenna tuner ON when syncing. 4.) set power amp to Rx:ON; Auto-Tuner:ON 5.) tune/sync/pair by switching the radio CW mode and do a 2 second CW burst for the amp to sync and match with the radio/g90. Done Everything should be good after, just go on as usual on the radio, the amp should switch bands and auto-tune as you operate the radio, almost effortless. I guess sync-tune matches each other input/output power and antenna tuners. I had same issues maybe worst than you did, and that's why the weird SWR you where having. They overheat on WSTJ-X FT-8. maybe mine is broken. I dislike that too much...

@hamradiotube 3 года назад

I assume you're talking to someone else cuz I'm not Gary but thanks for the good info.

@donh5794 3 года назад

Nice review! Does the XPA125B amp have a power adjustment or it just puts out max power based on the transceiver? The spec shows it puts out up to 125 watts and consumes up the 30 amps. Glad the actual amp draw is better than the spec. Did you put power poles on the amp power cable?

@tedw7193 4 года назад

40 seconds in a Stan is mentioned, thumbs up hit already

@hamradiotube 4 года назад

Hahaha!! Thanks bud.

@AndyAAzeroAM Год назад

Nice little amp! Maybe someone who doesn't use theirs anymore will sell one to me 😂😂😂..Good video too!

@RevGunn-jq3cq 4 года назад

Hell yeah, I agree with Stan.

@hamradiotube 4 года назад

Stan is the man

@momentosdelavida5147 2 года назад

thanks for the video Mike, what power supply are you using?

@MrBRCincy 4 года назад

K8MRD, I can’t wait to work you on a POTA activation soon. My portable shack is about assembled.

@hamradiotube 4 года назад

That's great! Glad to hear it.

@timdbl7804 Год назад

Hi Mike, many thanks for the demo :-) I noticed that the DC voltage, shown on the Xiegu amplifier, was dropping a lot on TX... Do you know where the voltage was being lost? Also, I think the instructions say that you should execute auto-tune with the amplifier by-passed? 73, Tim

@martinsalt1839 4 года назад

Hi, this a great review and thanks for sharing. I am thinking of buying the amplifier for use with my G90. Can you advise if I can keep the amplifier connected if I'm also using a SignaLink cable for digital modes (which also plugs into the ACC socket of the radio) ? I'm not particularly good at soldering and would like to know if the cables I already have, or come with the amplifier will allow me to use both pieces of equipment at the same time. Thanks.

@hamradiotube 3 года назад

Thats a great question and I honestly don't know. I haven't done any digital with my g90 or x5105. It looks like you can connect the CE-19 with the 3.5mm cables that come with it (the CE-19) but I don't know how that would plug into the signalink. I honestly don't think you would need the signalink. Take a look at OH8STN's channel. He's got some slick ways of configuring this radio for digital. If you just add the amp with its own cables I think it should work. Good luck and 73.

@BadHorsie2 4 года назад

Was looking at buying a FT-891, but might just pick up this amp for my X-5105.

@hamradiotube 4 года назад

Decisions decisions...

@walteredwards544 4 года назад

Even if it only reached 80 watts that's still good enough for a 1 S-Unit signal increase from the 20 Watt G-90 thank you for posting thos

@hamradiotube 4 года назад

It's enough to compete with a pileup for that DX station.

@walteredwards544 4 года назад

@@hamradiotube I just reached New Zealand from Georgia again last night with my G-90 on SSB, plus I got a 5.3

@hamradiotube 4 года назад

@@walteredwards544 That's awesome! It's not every day you get to make that far of a contact.

@walteredwards544 4 года назад

@@hamradiotube I've also reached Japan and Russia as far as the Caucus Mountains too. That all with a G-90 and a mfj EFHW LP 10-40 antenna at about 25' in a tree. I've still got a lot to learn so I'm enjoying all y'all at RU-vid University. Thanks for your efforts

@FjHenderson 4 года назад

If your ham friend needs a radio I have a kenwood ts-480sat really cheap. Has the 3 filters in it. Works great. I was going to hook it up as a dedicated digital radio but am having second thoughts. AC8GF

@hamradiotube 4 года назад

Thanks for the offer, I'll let him know.

@madmax2069 2 года назад

Those ACC cables remind me of the PS/2,S-video,ADB cables. I'm looking on getting a G90 as my first Radio that's not a CB.

@hamradiotube 2 года назад

Yeah they're pretty dated cables but they work. Have fun with your new G90 when you get it. I've made lots of contacts with mine.

@thomasstandley6309 4 года назад

Do you have any information for the large screen GSOC remote control head that Xiegu is apparently about to release for the G-90 and the X-5105? It looks like it would make the G-90 way easier to use in the field although there is no pricing. The description is on the Radioddity website (/products/xiegu-gsoc). If the thing is anywhere close to reasonably priced it would make the G-90 very attractive even compared to the ICOM 705.

@hamradiotube 4 года назад

I don't unfortunately. I have seen it and it looks really cool.

@ralphmills7322 4 года назад

I got a G90, now I need the CE-19 "puck" and the XPA125B amp,. Probably not this year as I'm more interested in picking up another LiFePO4 battery and a portable solar panel with controller/charger.

@hamradiotube 4 года назад

Right on Ralph. That's a tough call depending on how big your battery is. I just got a 100w solar panel and Bioenno charge controller I used for the first time on field day. If you can't have 12V out in the field, an amp would be useless. You might be on the right path there my friend.

@Echo_Hotel 2 года назад

Got this yesterday. I had the ATU working. It was at 3A standby. But today it’s at 0A and the PA doesn’t work. Should have tried the PA yesterday but a storm came in fast. Everything was discounted btw.

@josebrivera1716 3 года назад

Great video. Be aware that hams may want to take the amplifier out portable too in order to make it above the noise. You are assuming that the amplifier stays at home in the ham shack. In my case, I already have three 100 watt HF radios at home. But would like to have extra power when needed while out portable. 73 de N2LRB

@hamradiotube 3 года назад

Well I was going to tell you to watch the video of me with the amp portable but it looks like you did.

@n1tlf470 4 года назад

Is the cable and accessory only needed if you want auto band switching? If you dont have that stuff, is that what the band button is for?

@hamradiotube 4 года назад

I think it is supposed to be, but I haven't had luck getting it to work without the cables and Xiegu radios. I tried my Recent RS-918 and got nothing.

@AndyWragg 4 года назад

Hi Mike, I like the idea of it, but as someone who's been on the wrong end of a bad amp (local QRMer is wide as a barn door due to over driven input) I'd be interested to see what the output signal looks like.

@hamradiotube 4 года назад

Stay tuned, I’ve already had it looked at. I’ll be recording a video next week about the purity of the amp.

@hamradiotube 4 года назад

Just recorded the video tonight. I'll be posting it next week sometime.

@denelson83 3 года назад

@@hamradiotube Just noticed that you were really heating up that amp in your testing. Its internal temperature readout passed 50°C.

@jss672006 4 года назад

Thanks interesting video

@hamradiotube 4 года назад

Thanks for watching.

@robertmitchum2972 3 года назад

I have the FT-817 and the FT-818. Unfortunately QRP just isn’t cutting it when I go backpacking or camping portable...... I was originally going to replace the QRP rigs with the Icom 706 or the Yaesu 897, both of which I have in my Shack now.... Love both rigs, but the prices they want for used is astronomical! There looking for as much, if not more than I paid for these rigs new... Saw several RU-vid videos on this amp, and it intrigued me. I keep my 817/818, my 706 and 897 stay in the Shack. And I get an Amp with tuner I can lug into the woods and not worry to much if I ding it up. Should be here in a week to ten days....

@hamradiotube 3 года назад

I'm kinda curious if you'll get that to work. They advertise it as working with any qrp radio but I wonder how that would happen? You'll have to figure out a way to wire up the ptt from the radio to the amp. It is really designed for the Xiegu radios and even then you need that CE19 interface to allow the radios to talk to the amp. I thought about trying to use it with my RS-918 and gave up. I'm sure there might be a way but you'll have to get creative unless you know something I don't. Either way, keep my posted. I'd love to know how to do it.

@robertmitchum2972 3 года назад

@@hamradiotube As you stated... the amp is designed to work with the 817/818. Not sure if the amp has RF sensing to key itself, or if I need a keying circuit between the amp and radio? I know the 817/818 does have provisions for a keying circuit. Hopefully the cable between the amp and radio is just communication for the auto band select... That feature I can live without, manual selection is just fine by me.

@robertmitchum2972 3 года назад

According to everything I’ve read so far Xiegu makes an adapter for the FT-817/818. It is model CN-20 and appears to be a small circuit board in which the control cables pass through... Unfortunately it does not seem to be sold in the USA so far, so I had to order it through a company in the UK. Sinotel UK Ltd. is where I ordered the CN-20 from and it cost around $58.00 US with shipping.

@hamradiotube 3 года назад

@@robertmitchum2972 Oh sweet, then you should be all set. It's a really cool amplifier and the tuner is absolutely incredible. I hope you enjoy it. 73

@aerozg 3 года назад

@@robertmitchum2972 thank you for this information for the CN-20, i just got a new FT-818, and was looking for an amplifier. I’ve just ordered both, looking forward to do some testing soon! Will post results or maybe even do a video, i know many people owning a 817/818 would be interested.

@WH6FQE 2 года назад

For the radio he was looking for with all those features, there is the new Radioddity QR20 that is all band all mode with a built in battery. I am thinking about getting this amp to pair with my X5105 on POTA activations from Hawaii, otherwise I have to figure out how to do POTA using FT8.

@hamradiotube 2 года назад

Yeah I’ve seen that radio. I hate the interface but other than that it looks pretty cool. The amp works great with the x5105. It would be moot with the other radio as the amp only goes up to 6 meters. I think you’d def want some power in HI.

@WH6FQE 2 года назад

@@hamradiotube yeah, being stuck out here in the middle of nowhere, unless I want to only use FT8 I have to have some more power. I went ahead and ordered the amp today. And yeah, I hate the interface too

@brentOhlookAsnake 4 года назад

Is the G90 a good first Hf rig? I do a lot of camping and don’t really have a shack yet since I’m in an apartment. I was looking at the FT891 since it has more power. But the g90 has so many features. Any advice

@hamradiotube 4 года назад

The G90 actually has very few features. I think the main thing that people like about it is the waterfall display and the price. I would not recommend a qrp radio as your first. The 891 is hands down the better radio all around. The G90 lacks even the most basic filters that I normally use all the time; Noise Reduction and Notch Filter. Don't get me wrong, it's a neat radio, but for about $100 more you can get a nice feature rich radio like the 891. Physically, the g90 is only slightly smaller and not much less weight than the 891. My advise, and I imagine most others would tell you the same, is get the FT-891. It's great as a home radio and a portable radio. Of course if you like the waterfall screen, and I do too, you could opt to get the G90 to use portable and add the amp in the shack for more power. Either way, you will still need a battery to power them for portable. I actually like the X5105 more than the G90 for portable. It has an internal battery, noise reduction, notch filter, less weight etc. Way more features than the G90.

@brentOhlookAsnake 4 года назад

K8MRD RADIO STUFF awesome. Thank you. I appreciate the insight

@donizzo8884 4 года назад

Nice options and flexibility W1FYG

@hamradiotube 4 года назад

I'm gonna take it POTA one of these days to give it a proper K8MRD test.

@Liverichandtiny 4 года назад

Do you this this would work on the 705? Ticks 2 things with tuning and amp.

@hamradiotube 4 года назад

I don't know for sure, but I doubt it. There may be a way but I haven't explored it yet.

@kengrey7263 3 года назад

What's the problem with the cable feeding the linear? It's showing 1.6 SWR.

@hamradiotube 3 года назад

You know, I don't know. There are definitely some quirks with this amp to say the least. It does work, but there are little things like that about it that just leave you scratching your head.

@jbgreer 4 года назад

What did you use for the external watt meter?

@hamradiotube 4 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-T0GKHuCQvZU.html

@CC-hk6vy Год назад

Has anything changed with this? I continue to wonder if in a year my Ciegu is dead and I get 20 years out of a Yaesu etc.

@hamradiotube Год назад

There's really nothing to change. It's an amp, and unlike most Xiegu products, it actually works.

@kenthufford743 4 года назад

I noticed in your video, the voltage went from 13.9vdc to sometimes below 12.0vdc when keyed. I have a XPA125b and with about 2-3 watts in, I get over 100 out. But the voltage stays at about 13.5 vdc.

@hamradiotube 4 года назад

Hmm...interesting. I'll have to look into that. Thanks for noticing.

@Mxyzptlk21 2 года назад

@@hamradiotube any update on the voltage drop that was occurring in the video?

@z8ty 2 года назад

@@hamradiotube I read that you have to have solid 13.8v with Xiegu equipment to get max out. That could explain a few things.

@rickvk2rr149 3 года назад

You really did make it hard on that tuner in the amp. If you turned off the amp into bypass mode whilst tuning, then you wouldn't have got those messages for High Reflected Power. So tune on exciter only low power and then when a match is found turn the amp back into operate mode. High reflected power equals high voltages at the tuner components and could damage them if high enough. Nice amp and tuner combination though.

@hamradiotube 3 года назад

That is fantastic advise, I didn't even think about that. I would have assumed that the amp would have done that automatically like a radio with a tuner would. Perhaps I was overestimating the Chinese lol! Thanks for the tip! 73

@TBGaels32 2 года назад

I might have to look at this amp when I upgrade my license. I wonder how this will pair up with the icom 705.

@hamradiotube 2 года назад

It's great with Xiegu radios. It's only OK with the 705.

@TBGaels32 2 года назад

@@hamradiotube what would be a good amp for a 705? I’m upgrading my license next month so I can use the general portion of the band and getting the 705. From what I’ve seen online people suggest getting the 7300 instead.

@loyannmunyan1174 3 года назад

Now with this amp do you also need to turn off the internal tuner that’s in the radio?

@hamradiotube 3 года назад

Yes you do not want to use the tuner on the radio. Make sure that is off.

@loyannmunyan1174 3 года назад

@@hamradiotube that is what I figured but wanted to make sure thank you enjoy all your videos

@americaswayout4489 4 года назад

Wish you had demoed it with the G90, likely more output with a little more drive!!

@hamradiotube 4 года назад

It really isn't. I actually hooked it up to see and it makes very little difference.

@Tobi-xj8xw 3 года назад

what would you choose between this amp with a g90 or a ft891 and a tuner?

@hamradiotube 3 года назад

891 and a tuner all day long.

@Tobi-xj8xw 3 года назад

@@hamradiotube the reason I asked was because I can't to go all out with a 891+ tuner( unless i make/ buy a resonant antenna for every band i wanna be on and skip the tuner) so i was thinking i could buy the g90 and the amp later

@redjohn20001 4 года назад

It didn't do 100 Watts but I noticed the voltage dropped to 12.1 volts when you keyed up.

@hamradiotube 4 года назад

Yeah I'm gonna have to look into that. A couple people have pointed that out.

@marcinmichigan2772 3 года назад

Mike, @17:05 I think that the amp is idling at three (3.0) amps NOT 0.3 amps. what say you? de K8MH

@hamradiotube 3 года назад

That meter is wrong. I've tried to find a way to do a reset on it but it doesn't look like that's an option.

@freeascent63 3 года назад

This is great and I want to use it for POTA with my ICOM 705 in all modes. Anyone worked this out?

@hamradiotube 3 года назад

Apparently it works with the 705. I think it was Martin Lynch & Sons in the UK that are selling these for the 705. Its just a different PTT cable I guess.

@sulochanasatyan7228 3 года назад

Is it possible to connect an FT 817nd to this amplifier, thanks

@hamradiotube 3 года назад

I don't have any idea unfortunately. I'm not one to use the word can't, but I don't own an 817 to even try.

@artadams1 3 года назад

yes, they make an interface for the FT817 to use this amp.

@hamradiotube 3 года назад

@@artadams1 Good to know. They make one for the 705 too. I picked up the cable a couple months ago.

@ErnestGWilsonII 4 года назад

When you take that amplifier out into the field for a test please let us know the frequency so we can try and look for a Stan on the air

@hamradiotube 4 года назад

I'll have to bring Stan with me but I will do that. I usually don't spot myself, but if you follow me on Twitter @k8mrd, I usually will post there.

@ErnestGWilsonII 4 года назад

@@hamradiotube will do!

@angelhelp6819 4 года назад

I bought one xiegu xpa 125b still waiting for it come from China I bought it from ham out l let basic is ships from the manufacturer in China 👍

@hamradiotube 4 года назад

Oh man, that's prob gonna be a long wait. I hope you are more patient than I am.

@angelhelp6819 4 года назад

Yes I hate what the stuff come from China

@angelhelp6819 4 года назад

Make more videos l like like them 👍

@rpsmith 2 месяца назад

They sent me 3 of these amps (all 3 had different problems) before the gave up and refunded my money! Your mileage may vary!

@cx5fk Год назад

3 Amps idle. What tube do you use? 73

@hamradiotube Год назад

RU-vid.

@KA4UPW 2 года назад

How about testing it with the x6100

@hamradiotube 2 года назад

I don’t have a 6100. Not really a fan of that radio.

@potaactivator 4 года назад

Roughly $1000 for the the G90 and the amp. You can buy an FT-891 for less and you won't need the amp. Of course, if you already have the G90 or the X-5105 and don't want to upgrade your rig this amp may fit the niche Mike was talking about.

@hamradiotube 4 года назад

It's all about options. And in amateur radio there are many.

@artadams1 3 года назад

I thought it odd that your amp pulls 3 amps idle, my XPA125B only pulls .8-1 amp idle.

@hamradiotube 3 года назад

It doesn't. It just says that for some reason.

@JamesHalfHorse 3 года назад

I got the G90 and a TYT quad band for everything the G90 can't do and didn't spend a lot. I figure when I want to really reach out and touch someone and I am okay with the G90 display then I will get the X125B since it is plug and play with the G90. If the display isn't going to work for me then I will probably look for another radio that has a nice big display and power since buying the X125B and the G90 Gsoc? would put me in the range of a more expensive HF rig. I wish Xeigu would make a GUI for the G90 I could run on my laptop which would make it perfect.

@hamradiotube 3 года назад

That would be pretty sweet to run from your computer. If you decide to upgrade just get the 7300. It's everything you described and is about $1000 now. Plus, its a way better radio all around.

@JamesHalfHorse 3 года назад

@@hamradiotube I am considering the G90 a dip your toes kind of radio I am sure I will get something better and it will go in pelican case with everything it needs to run out in the field once I am done using it as a base. But yeah a full GUI would make it a show stopper. I understand some rig control software can talk to it but I don't know what it can and cant do

@WobblieSkellie 3 года назад

Why is it so hard to add 2 meter and 70 centimeter though? Even if it were like a separate radio sharing the same case, I don't understand why it's "not gonna happen" when Baofengs are $25.

@hamradiotube 3 года назад

Well Baofengs aren't very good radios for one so thats not the best comparison. Not sure you've heard the latest news, but the Icom IC-705 has 2m 70cm. So does the Yaesu 817 & 818, 857, 991a, the Icom 706mkIIG, The Elecraft KX2&3 can add 2m with an extra board. Prob some others that I can't think of.

@mikemills1652 4 года назад

That amp is said to put out 125 watts with the G90 's higher output. Too bad you didn't show the results,

@hamradiotube 4 года назад

Sorry to disappoint.

@eddycuypers7621 4 года назад

Let me see; A xiegu x5105 or Xiegu G90 for about $500. A Xiegu XPA-125B for about $549.95. As a base setup one needs a power supply for about $100. Together for about $1150. A Icom IC-7300 is about $1,100. Look at that now. One gets three boxes (Made in China) for the price of one box. Talking about a good deal.

@hamradiotube 4 года назад

Yes, exactly what I said in the video. Some people want options. Might not be for you.

@tritonenvironmentalandrest9245 2 года назад

Can this amp work for GMRS?

@hamradiotube 2 года назад

Perhaps you didn't watch the video, or you didn't read the title, but the answer you seek is in either.

@cobrasvt347 4 года назад

Next video : try’s a 9:1 EFHW with the tuner. 🤔

@hamradiotube 4 года назад

I literally did that on the video after this.

@OtherTimDavis 4 года назад

I must have missed the built in flashlight.

@hamradiotube 4 года назад

Lol

@mikesamra9126 4 года назад

The only thing you are doing is making the transmitter happy in that there isn't all that reflected power going back into the transmitter. You still won't be able to effectively transmit on 160m with a 40m dipole because the antenna itself is nowhere near-resonant at 160m even as a quarter-wave if that was even remotely possible being that far off.

@hamradiotube 4 года назад

You are correct. But I have made some 160m contacts last year during the AM contest with the same antenna. So it does work. Not efficiently of course, but we all know that anyway. It's still fun to experiment. That's the name of the game. Thanks for watching. 73

@hamradiotube 4 года назад

BTW, my external power meter was not happy at all!! All kinds of reflected power haha!

@mikesamra9126 4 года назад

@@hamradiotube Ah, that makes more sense. N8TPI

@mikesamra9126 4 года назад

@@hamradiotube I'm in Michigan and I'm down on 3.880 AM phone a lot in winter. I run a Johnson Viking 500 and a Viking Valiant. I have all vintage gear that I rebuilt. I do have a Ten Tec Omni 6 I use for SSB on occasion.

@josemariatrueba4568 2 года назад

you are not seeing 100w because the voltage inside the amplifier shows much less than 13.8 volts!

@djalbertomixloberia6171 Год назад

Hola consulta anda en 11 metros

@ok4rm 2 года назад

Well, this is interesting. My XPA needs only up to 0.6 W (0.3 W at 80 meters) to be driven to full power. Effectively, with G-90 there's no possibility to regulate output power, it runs always at full throttle and the only way to push G-90 down to 300 mW is the ALC - the firmware allows minimum power 1 watt. The PA in the video needs over 5 watts to full power. How's that possible?

@hamradiotube 2 года назад

The stupidity of it is immeasurable.

@z8ty 2 года назад

It's published to use 5 watts in... If I understand you are getting 100w with just .6w?

@ok4rm 2 года назад

@@z8ty Well, it depends. When I connect G90 with 3, 4 or 5 watts, XPA-125 indicates input power 0.1-0.2 watts, G90 shows the same. The funny thing is guys at Xiegu made it possible to regulate G90 power only by steps of 1 watt starting with 1 watt. I have no chance to set 0.5 or 0.1 watt except by means of ALC from the PA. Sometimes, however, mostly when the output match is not perfect, it may occasionally show 2w input at 85w output on a higher band (14 and up). But on low bands it is pretty hot (I mean having high gain).

@guidelineuk 4 года назад

CQ🤘🏼😎

@hamradiotube 4 года назад

Damn right!!

@guidelineuk 4 года назад

@@hamradiotube I'm studying for my amateur but I still want this ha ha 😂

@hamradiotube 4 года назад

@@guidelineuk Thats great to hear you are studying. I've only been licensed for about 4 years. I remember being new to the hobby and watching all the videos with all the cool toys (I still do!) before getting my call. It doesn't stop. It only gets better. Keep me posted, I'd love to hear when you pass your test!

@guidelineuk 4 года назад

@@hamradiotube 100% I will keep you informed.. getting a new laptop so I can do my test online hopefully in a week or two you put the great videos 73 for now 😎🤘🏼

@AG7SM 4 года назад

I have no good reason to buy this amp but boy I want to.

@hamradiotube 4 года назад

Come on David, do we ever need a "good" reason to buy another piece of amateur radio kit? I am literally never on 2m/70cm, but I absolutely love HT's. I've been wanting the Yaesu FT4XR or the FT65R for months. I would prob never use it but I still want it! Course, those are quite a bit less expensive... Thanks for watching.

@AG7SM 4 года назад

K8MRD RADIO STUFF No, I don’t, and that is my main issue. ;) And your videos do not help me. Keep making them.

@hamradiotube 4 года назад

@@AG7SM Sorry, not sorry lol! I'll keep making them though.

@Transmissions 4 года назад

Pair that up with the IC-705 and there ya go.

@hamradiotube 4 года назад

I think this is supposed to work with other radios that aren't Xiegu, but I haven't gotten it to work yet.

@Transmissions 4 года назад

K8MRD RADIO STUFF That would suck if it only works with Xiegu. Hopefully you’ll figure it out. We got your back man!

@kenthufford743 3 года назад

I have my 125 working with my Icom 7100, with the power in turned way down. So should work with the 705

@elliothuh669 3 года назад

Can't get mine to tune at all.

@hamradiotube 2 года назад

Hmm, thats weird.

@elliothuh669 2 года назад

@@hamradiotube Yeah I have to use an external tuner to get semi decent SWR. I wonder if maybe I am doing something wrong.

@artakamiraghyan7698 Месяц назад

You have a weak power supply; 13.8 Volts are not maintained in transmit mode, so do not receive full power. 73!

@kylefreemason 4 года назад

Buy a 7300 be done with it and not have the added extra expense or the amp to lug around.

@hamradiotube 3 года назад

Thanks for watching. I feel you may have missed the point I was trying to get across though.

@kylefreemason 3 года назад

@@hamradiotube I understand. I appreciate the video and perspective. I also enjoyed your WRC video illustrating the various setups.

@Brighamdoc 2 года назад

Ahem…..

@hamradiotube 2 года назад

bless you

@Brighamdoc 2 года назад

@@hamradiotube my name is Stan You hit too close to home calling Stan a LID LOL Love your stuff keep it up

@ErnestGWilsonII 4 года назад

First

@hamradiotube 4 года назад

That makes you the best! Thanks for being there.

@ErnestGWilsonII 4 года назад

@@hamradiotube I am so terrible at scheduling stuff, I just got lucky and I saw your stream was about to start so I clicked it! thank you for all the great content that you make and share with all of us!