BTECH U25D DMR Amplifier - BEST DMR Handheld Amp

Подписаться 173 тыс.

Просмотров 39 тыс.

50% 1

From BaofengTech, an amp for you DMR HT that will do both TDMA (DMR) and analog on the UHF band. I'll show the features of this amp and we will do some power testing with the unit in this episode.
amzn.to/2JGn7gg
★★★ KEEP THE MOMENTUM GOING★★★
SUBSCRIBE for more Ham Radio video: goo.gl/6hjh2J
Checkout my WEBSITE: livefromtheham...
PATREON: goo.gl/FkESU6
📜 Be sure to support my sponsors, who make this series possible: 📜
gifts4hams.com
www.randl.com
www.buytwowayr...
connectsystems....
★ MORE HAM RADIO ON RU-vid★
Livestreams first and third Sunday evening of each month, check this link for times: hamradio2.com/l...
Guest Host on w5kub.com on Tuesday evenings, 8pm CST
★ FIND ME ELSEWHERE ON RU-vid★
Craft Beer: / texasbrewcrafters
Lifestyle and Travel: / @jasonbuildsstuff
DOG Rescueing and Fostering: / @rescuedpups
✔ SOURCES ✔
AREDN Mesh Networking Hardware: goo.gl/eZvvPb
Get a DMR or NXDN ID: goo.gl/dVtCNY
TAPR DCC of 2019: tinyurl.com/y2g...
ALL the DMR Radios: goo.gl/iK9ja1
How to write a DMR codeplug: goo.gl/tCrrws
Get your TECHNICIAN License! goo.gl/vhrR2S
Upgrade to GENERAL! tinyurl.com/w2l...
DMR, DSTAR and YSF Hotspots: goo.gl/d1V5d1
✉ JOIN MY NEWSLETTER ✉
All Patreon contributors receive a monthly Newsletter. Please consider supporting the cause today! - goo.gl/FkESU6
Theme and background music courtesy of www.bensound.com
⚑ SUBSCRIBE TO MY CHANNEL ⚑
If you are interested in my videos like this and want to support my efforts, please consider subscribing - goo.gl/6hjh2J
ツ CONNECT WITH ME ツ
Leave a comment on this video and it'll get a response. Or you can connect with me on different social platforms too:
Discord: hamradio2.com/...
Facebook: hamradio2.com/...
Patreon: / hamradio
Instagram: / hamradio2dot0
Twitter: / hamradio2dot0
-----------------------------------------------------------------------------
MERCH! T-shirts and Hats to support the show!
goo.gl/M23bvG
iTunes................► goo.gl/dZYcBb
Discord.....................► hamradio2.com/...
Facebook.................►hamradio2.com/...
Twitter......................► / hamradio2dot0
Instagram.................► / hamradio2dot0
Mail: 2150 W. Northwest Highway #114-1163, Grapevine TX 76051
Thanks for watching!
#Hamradio #kc5hwb #texasjproductions

Опубликовано:

27 сен 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 138

@sandraabarca6029 6 лет назад

Can’t count how many time I have dropped my 5x3 Btech battery falling out etc. guess what .. it still work no problem whatsoever after 1 yr 👍🍺🎙

@jasonbrown467 3 года назад

the fact that the model number has a "25" in it makes me think 25 watts is all it was designed for, not that i have a problem with the power, just saying. great video, im slowly making my way through your videos, lots of great stuff.

@benjosevilla Год назад

I have been using the BTECH analog only with my Wouxun kg-uv9G pro(5.5 W out). My SurecomPlus meter is showing power out of 47 Watts on a repeater channel. My power supply is 20amp continuous 30 peak with 13.8 volts. Good improvement with hard to reach repeater over my 20 W kg-xs20g plus. Lol I’m currently using this HT+u25amp as my base.

@ScorpionRanchTX 5 лет назад

The 25D doesn't allow pass-through with the amp off. The analog version does, however.

@denniscody3799 6 лет назад

Amp does not have a pass when powered off and attenuates the heck out of the ht output. Still a great little amp. Thanks Jason great review. 73 WR5DC

@HamRadio2 6 лет назад

Yep, that's what it seems. Strange but true

@ralphmowery2898 Год назад

It also attenuates the receive if powered off. Takes my HT receive from less than 0.2 microvolts to needing 100 microvolts to break the squelch.

@bob45140 4 года назад

The loss you saw with amp powered down was the loss thru the apm FETs and any input and output circuits. (No relay bypass)

@bubbarob1978 6 лет назад

I'm thinking it does not allow pass-thru with the amp powered off.

@HamRadio2 3 года назад

Correct, it doesn't seem to

@Johnyrocket70 3 года назад

The U-25 has pass thru

@johnlagreca6288 3 года назад

Definitely a pass through issue. I am not believing 14+dB loss nor that you would have 25 out with 0.18 in. I have heard pass through issues with these amps but mostly folks trying to pass through out of band.

@salvatorebruno6799 3 года назад

The U-25 WILL pass thru with power off. NOT the U or V25D versions.

@GTGallop 6 лет назад

DUDE! You are killing me with that Topo Chico. Sure do miss it. Can't get it in AZ

@KE8ODY-WV-Ares-Ham-Dad-3O4 5 месяцев назад

I love watching all your gadgets one day I hope to have a quarter of them

@KE8ODY-WV-Ares-Ham-Dad-3O4 5 месяцев назад

I’m always open to old unused gadgets lol I got a autistic son who’s showing interest in radio he wants a shack so accepting donations

@M70ACARRY 5 лет назад

I bought one recently for a project. The input tuning was horrible. Returned it.

@walterblizzard 6 месяцев назад

They claim on the packaging that running through the amp delivers a cleaner output? Have you tested for spurious emissions with the amp?

@HamRadio2 6 месяцев назад

I have not

@foodconnoisseur8397 4 года назад

Is there a dual band UHF and VHF amp that's let's say 100 watts You can recommend? How about a UHF vhf and HF all in one amp that's 250 to 300 watts?

@HamRadio2 4 года назад

I've never heard of a dual band amp with that much power. They make some monobands that'll go up to 175 or so, but those are mostly meant for SSB

@ponchorodriguez9408 3 года назад

W6BVI this divice overheating I have to made a hole and put a fan and is working fine I always use it in my car and I am happy

@cmvb69 5 лет назад

How many amps does the power supply need to be putting out to power the amp? Desperate for the answer

@HamRadio2 5 лет назад

Hmm, not sure, I don't recall reading that. I will say that the power wire that comes with the amp is fairly small gauge, so I would suspect something around 10 amps.

@cmvb69 5 лет назад

@@HamRadio2 ok ty for responding

@jeffworkman1982 8 месяцев назад

Max 5.5 amps +/- 10%

@gorillamotors 5 месяцев назад

Do you like your MFJ-849 watt meter or would you recommend a different one now?

@HamRadio2 5 месяцев назад

I like it

@22272480 2 месяца назад

Can this amplifier be left on, or does it need to be turned off after each use?

@HamRadio2 2 месяца назад

Not sure but I don't see why you couldn't leave it on. It's a transistor Amp, not tubes

@cmvb69 5 лет назад

Have you ever tested the output of a 8 watt baofeng tri power?

@HamRadio2 5 лет назад

Not that I recall

@robertburdoff1789 Год назад

I was close to buying one but looked through the reviews on Amazon. Although it gets 4.4 stars, the bad reviews all seem to point to it having questionable build quality & short longevity :(

@jeffreyweatherwax6815 5 лет назад

I WOULD OF LIKED TO SEE THE HT ON ITS CHARGER AND THE HT ON HIGH

@apar1560 Год назад

👍👍👍 Thanks. ...Alan in 🇨🇱

@firstbloodbushcraft8354 10 месяцев назад

Does the amp increase signal reception?

@HamRadio2 10 месяцев назад

If it has a pre-amp, then yes. Otherwise no

@johndowd7010 5 месяцев назад

I have the radtel version that does 400 to 480 mgh and I get 38 to 45 watts..

@jojojeep1 5 лет назад

In order to get 40 W out of that amplifier you need to put six watts Into it

@larrystokes8787 3 года назад

I am guessing this little amp will work with the Anytone AT-868UV?

@HamRadio2 3 года назад

Yes, it should

@bdnicoll 5 месяцев назад

Can you use a desk mic?

@HamRadio2 5 месяцев назад

Yes

@bdnicoll 5 месяцев назад

@@HamRadio2 Thanks

@K6WRF Год назад

Any benefit or would it even work with the Radioddity DB25-D and this amp? Would it yield the 30-40W it claims?

@benjosevilla Год назад

Max input is 6 watts

@linaskerbelis5636 4 года назад

What cable to use in order to connect it to Yaesu FT3DR?

@HamRadio2 4 года назад

FT3D is a Fusion radio, not DMR. But since I believe this amp will also work with analog, it should work with Fusion too. You'd need an adapter to connect to cable that comes with the amp to the antenna port on the FT3D

@allanmccullough8550 6 лет назад

The power is probably not getting to the meter with the amp off, probably cuts the circuit or absorbs the signal.

@humaxf1 6 лет назад

@Allan McCullough Agreed. More than likely has a switching circuit that connects input to output and without power it simply won’t work... nothing to do with coax quality or loss!

@HamRadio2 6 лет назад

Allan McCullough Yeah that's possible. But in other applications, this isn't the case. I have a VHF amp where it's outputs power with the amp off

@itzam1258 4 года назад

Would this work even if I dont use the supplied mic and connect the ptt cable to the amplifier. I have a radio wired-in with ptt button on steering wheel and mic in helmet, just want signal amplified.

@HamRadio2 4 года назад

You don't need to use the supplied mic. But you will have to use one of the cables provided to connect it to your radio.

@itzam1258 4 года назад

@@HamRadio2 I can't just use the antenna input and output? Don't want to have the ptt, or any controls, though the amp.

@BR20276 3 года назад

All you need to do is attach the antenna cable (sma m/f) to the input on the back of the amp from the radio antenna jack (sma m/f) on the radio. Then you can use the radio PTT on the radio or hand mic attached to the radio. You then control what ever mic you use from the radio.

@itzam1258 3 года назад

@@BR20276 awesome thanks

@jeffreyashman9751 6 лет назад

What external antenna would you use?

@PeacefulDeathUK 3 года назад

Hi. Can this also receive in the higher wattage. Thanks.

@HamRadio2 3 года назад

Do you mean a higher drive power to push the amp? No, they don't recommend that

@PeacefulDeathUK 3 года назад

If I'm transmitting say in 30 watt of power and reaching my friend on his radio would I be able to hear him transmitting back to me also was what I was meaning.

@HamRadio2 3 года назад

@@PeacefulDeathUK what you're hearing on the receive side has nothing to do with an amplifier. Amps are for higher transmit power

@PeacefulDeathUK 3 года назад

@@HamRadio2 so my friend will hear me but I won't hear him.

@HamRadio2 3 года назад

@@PeacefulDeathUK Right, if he doesn't have enough power to get back to you, then you won't hear him. Depends on what he is using also.

@RevGunn-jq3cq 6 лет назад

How does Btech "improve" on baofeng radios? Or is that their marketing gimmick?

@HamRadio2 6 лет назад

Rev. Gunn In my opinion, they're much improved. I own a few of their radios and they're more reliable and better sounding than a Baofeng straight from China

@sandraabarca6029 6 лет назад

Rev. Gunn it’s there triple AAA team 🍺😎🎙👍

@RevGunn-jq3cq 6 лет назад

Ham Radio 2.0 thanks, I own 3 I have had them for 3+ years I think the came from China cause they were so cheap ~$25ea. They seem to work fine. The amp looks like a good idea.

@scooterjes 6 лет назад

I wonder if 10mw from my DVMega would drive that thing in rfsense mode?

@HamRadio2 6 лет назад

James Scouten It would drive it, not sure how much you'd get though.

@scooterjes 6 лет назад

Thanks I was looking at one of those to boost the power of my hotspot so I could have my own dstar repeater since the nearest one is 80+ miles away.

@HamRadio2 6 лет назад

The duty cycle on a setup like that would suck. Build an MMDVM box instead.

@ralphmowery2898 Год назад

@@HamRadio2 While this is over 4 years old, I tested an amp at 10 milliwats and it will not activate the transmit circuit of the amp. It stays in the receive mode. Did not test it with the direct none RF keying.

@d.l.bryson5043 6 лет назад

to bad they don't offer it in UHF/VHF digital. it's either UHF or VHF

@HamRadio2 6 лет назад

Agreed

@rossbassette7518 6 лет назад

Will this work with a DSTAR HT?

@HamRadio2 6 лет назад

Ross Bassette DSTAR isn't TDMA so any regular amp should work with it, including this one.

@ronmiller7135 4 года назад

So looks like for input near 6w,the output is 25.7w.That mens that this amp will never reach 30w output.You already input the max power of 6w.Not to mention that some times this amp is advertised as 40w.May be with dummy load.

@dwightshepard9773 2 года назад

I get 29 out with 3.5 in from bf8

@gary5831 6 лет назад

Since you need the handheld needs to be close by the adjust freq and audio, I see no reason to use the mic on the amp. A speaker mic from the radio, close near the operating poistion seems to be more than usable.

@HamRadio2 6 лет назад

That's possible also. They give you options so you can choose

@jimmygerilius8494 6 лет назад

0.1 dB loss per connection... 0.3 dB loss for your setup here.

@louwgreeff4195 2 года назад

Based on your tests I conclude a handheld will give you about 25watts out and its passthrough is almost non existent. Would be cool if it had a pre-amp as well but I" guess you get what you pay for

@KE8ODY-WV-Ares-Ham-Dad-3O4 5 месяцев назад

Any reason to just for vhf/uhf doesn’t help dmr lol

@HamRadio2 5 месяцев назад

English, please

@KE8ODY-WV-Ares-Ham-Dad-3O4 5 месяцев назад

@@HamRadio2 lmao voice chat that amp is strictly to strengthen vhf/uhf signals correct lol

@donaldwhitlock9961 3 года назад

There's confusion with DMR and dDMR. Has anyone actually used this U25D on DMR to prove compatability? KN4YBP

@HamRadio2 3 года назад

What is dDMR? Are you asking about the U25D amp from BTECH?

@donaldwhitlock9961 3 года назад

@@HamRadio2 dDMR is digital DMR and the technicals are that it's frequency FDMA rather than time TDMA. They're incompatable.

@HamRadio2 3 года назад

@@donaldwhitlock9961 Seems odd. And a redundant name - "digital Digital Mobile Radio" Yaesu's Fusion is FDMA but I have never heard of dDMR

@donaldwhitlock9961 3 года назад

I may have made an error. I'm saying the BTECH amplifier uses FDMA abbreviated as dPMR and would not be compatable with DMR. I'm still researching this. But I did read that the BTECH doesn't do TDMA. Does BTECH say that their amplifier will work with production DMR radios?

@donaldwhitlock9961 3 года назад

This is from BTECH page: Supported Amplification Modes The AMP-U25 operates from 400-480 MHz and can be used for analog FM, P25 Phase 1, C4FM (System Fusion), NXDN, IDAS, dPMR, and MPT1327 modes. (NOTE: doesn't say DMR compatable)

@FireRescue884 10 месяцев назад

It’s not line loss, that’s all it will put out. It’s kinda pointless to have an amp put out less then what a radio will. But hey, you did your best to push this junk.

@scottwilson7554 3 года назад

BEWARE... I bought 2, put the first one on the power meter and although it activated my radio fine my power meter said 5Watts, no more than just the radio. After checking all connections I put the second one on and boom it does 35Watts no problem, so I opened the first one and could easily see a huge blob of over solder shorting a power transistor to a resister. I had to soak up a ton of solder to get it right. This tells me they save money by NOT bench testing their equipment before selling it, They let us do that and go through the hassle of returning it if it's not right. NOT the way to run a company...BTECH is on my "only buy cheap stuff you wont be disappointed if it doesn't work" list.

@jasonbrown467 3 года назад

i bought 5 baofeng radios since christmas, 3 of the 5 are going back due to clones, fake info, broken sound, not producing any transmitting watts etc. call me a fool, for i am not giving up on them yet. with some china junk you just got to buy it 3 times to get a good one lol. btw did you measure and confirm that 35 watts? in the video he only got 25 watts, and "25" is in the title so i assumed they exaggerated the power like usual, and then forgot about the model number contains the power wattage

@mrhp434 6 лет назад

Nobody cares about the packaging

@HamRadio2 6 лет назад

Comments from other viewers would beg to differ.

@mrhp434 6 лет назад

Ham Radio 2.0 why?

@HamRadio2 6 лет назад

I don't know why, you'd want to ask those who thank me for the unboxing vids.

@mrhp434 6 лет назад

Ham Radio 2.0 anywhoray..keep up the reviews..love the channel

@HamRadio2 6 лет назад

Thank you sir, for the feedback and for watching.

@mtngr1 4 года назад

Which one should I get? 2 meter or 70 cm one? I wish it had for both uhf and vhf

@marinkusev5664 6 месяцев назад

What will happen if input power is 1Watt? Will the amplifier work? Looking for dmr amplifier for my hot spot. Thank you

@devinharvey6578 3 года назад

Using this on a 5watt repeater and I can Transmitt to the Repeater and the Repeater transmit to my dad 5 miles away but when he trys to Transmit to the repeater I get four TX flashes on the amp and no sound on my radio.

@donaldwhitlock9961 3 года назад

Have you determined why?

@juanmoscoso6782 Год назад

I have baofeng bf- 8hp wat work with amp 25 thanks

@HorseHeadMike 11 месяцев назад

Will this work with a UV-9G? Thanks

@JakeSweeper 5 месяцев назад

Would love to have that amp in a dual-band setup for my pickup; would certainly make things a bit easier with the setup as you could just swap out H-Ts if/when needed and just leave everything else hooked up.

@HamRadio2 5 месяцев назад

Yes

@MrTimowens 5 лет назад

Would it be possible to use this amp with a mobilinkd, a ht for aprs. The extra power would come in handy where I sometimes go.

@HamRadio2 5 лет назад

Probably, but the duty cycle would be terrible, so I am not sure it would be advisable

@Jays620 6 лет назад

Wonder if it would work for a hotspot.

@dxace1 2 года назад

This may have been asked before, but there are several different models of this amp -- which one works with a UV-5R Mk IV or similar?

@rd3avc370 3 года назад

Thank you! I have the same amplifier with VGC brand.

@HamRadio2 3 года назад

Yeah I think they are all the same, just rebranded

@linaskerbelis5636 4 года назад

Can you connect it to yaesu( where to get such cable)?

@HamRadio2 4 года назад

I would assume so. It will do analog also.

@jasonbrown467 3 года назад

also, good of them to support some of the air band and the marine band on either side of the 2 meter ham lol

@cchalfantusa Год назад

Show idea: using two of these amps (vhf and uhf) to create a station to share the amps between there HTs one each for C4FM, Dstar, and DMR. This would be so useful for winterheat contest and far less expensive than (3) mobile units.

@g1lbu948 4 года назад

I think you have to question if the BTech has a bypass mode. It would be interesting to see what the SWR is between radio and BTech with BTech switched off.

@PU6JDB 5 лет назад

Here in Brazil, man .... a big hug to all PU6JDB.....Does this amplifier transmit in both slots?

@HamRadio2 5 лет назад

At the same time? No

@3statesnetllc 3 года назад

Does anyone make a 200 watt one

@billchessell8213 3 года назад

Mr. Carlson you are not.

@hvacr96 3 года назад

Will this work for a GMRS UV-5X Baofeng ?

@HamRadio2 3 года назад

I suspect not

@BradSnyder1 6 лет назад

Neat little amp! Thanks for sharing it Jason! 73

@gabedorpinghaus629 3 года назад

Any videos explaining DMR

@HamRadio2 3 года назад

Yes - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-L_OPs0izne4.html

@gabedorpinghaus629 3 года назад

@@HamRadio2 in simplex form what kind of range does it have...without towers

@gabedorpinghaus629 3 года назад

@@HamRadio2 love your show!

@christophersmith1155 3 года назад

the wattage loss was due to the crappy pig tail jumper. Better to use a barrel connector with RG-8U. I upgraded to this for my set up in my high rise APT here in Manhattan. It made a world of difference. I use it with my Btech UV82HP. And the MFJ BARREL ADAPTER CONNECTOR.