MX-P50M Keyer Mod and Installation for Icom 705

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In this video we learn how to make and install the Keying Circuit for the MX-P50M Amplifier to work with the Icom IC-705. Special thanks to Kevin, KB9RLW, without whom, this would not be possible.
Check out Kevins channel here: ru-vid.com
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Опубликовано:

11 май 2022

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Комментарии : 59

@loughkb 2 года назад

Congrats Mike. Success when building your own stuff really feels great. Could hear it in your voice the first time you keyed it. Thanks for the mention, and I'm glad you found it helpful. It was nostalgic in a way, watching you put it together. My hands are about that unstable now, so it was just as nerve racking for me when I first made the mod. :-) 73.

@hamradiotube 2 года назад

Wow, thanks! A little bit nerve wracking for sure but it works. Still does too! Thanks for figuring this out. I'd have never been about to do that. Now stop! I don't need more projects tearing apart my gear lol!

@smfritch 2 года назад

So far, every IC-705 owner I’ve met who uses this amp, simply puts a mini phone jack on it and it works great. I have not heard of anyone ever having a problem. I’ve been using one myself like this for a year. I use it constantly in the field. By the way Mike, keep up the videos. I never miss any of them. We need more people like you out there to encourage amateur radio operators to get out and get on here. Thanks for doing what you do.

@hamradiotube 2 года назад

Yeah I didn't want to have that voltage coming back into my radio. If a $200 amp breaks, that's one thing, but I don't want anything to happen to my 705. Knowing my luck, bad things would happen. Thanks for watching. I really appreciate it. 73

@chriscoel 2 года назад

As a visual person, who doesnt always understand a schematic.. this type of video is well appreciated!

@hamradiotube 2 года назад

Thanks so much, glad it helped.

@KK6USYHamRadioAdventures 2 года назад

Excellent job Mike, and cool that You gave Kevin and your buddy the credit for the info and parts!

@hamradiotube 2 года назад

Thanks Chuck!

@owlcricker-k7ulm Год назад

Clean demonstration Mike. Very well assembled process and photography. Thanks to you and Kevin for helping all hams. 73 OM

@hamradiotube Год назад

Thanks for watching

@raymondlewis2055 2 года назад

Thank you Mike for this great instructional video! I can understand your apprehension on the first turn on. I just could not understand What Kevin did, but you did and showed, exactly what to do. Thanks again. You are the Master of the solder iron!

@Bill-HRT 2 года назад

Thanks, Mike! This is a project I've been wondering about, and I want to get going for my kit. I am glad you made visual for all our benefit. I think with your and Kevin's help it will be easier for me. AND, today I learned about liquid electrical tape lol! I'll be using it like white out lol

@hamradiotube 2 года назад

Liquid electrical tape is really good for keeping the magic smoke out too :)

@DK5ONV 2 года назад

Mikey...thx for being awsome. You got great soldering skills...looks very professional and save. 💯🎸🤘🍻👍🙋‍♂

@Transmissions 2 года назад

Nice work Mike! The 705 and that amp are a heck of an awesome minimalist setup.

@hamradiotube 2 года назад

It sure is!

@DonDegidio 2 года назад

Hi Mike, Two thumbs up for a job well done. I remember when Kevin designed that circuit and had it running with his FT817 and also the RS918. Stay safe. 73 WJ3U

@hamradiotube 2 года назад

Thanks Don!

@k6usy 8 месяцев назад

Now you can just put the USB-C replacement board in the 705. The replacement board has more protections on the key circuit.

@phildurall7466 2 года назад

"705 Alive!" This is the soul of amateur radio ... experimentation and building things! Keep it up Mike! Nice job Sir! 73 - KF6IF

@hamradiotube 2 года назад

And not blowing them up!

@phildurall7466 2 года назад

@@hamradiotube that's when you practice the other part of the "soul of amateur radio" ... troubleshooting and repair! 😋

@hunt555fish Год назад

Nice job Mike.

@KM4ACK 2 года назад

Great video. Thanks Mike!

@hamradiotube 2 года назад

You bet!

@K5QBF 2 года назад

Moar power! Great video Mike.

@hamradiotube 2 года назад

Exactly

@Frisky0563 2 года назад

Mike that diode is a 1N914 general purpose diode

@wecontrolthevideo 2 года назад

And BTW that is a “signal” diode (not single)

@davidmayes1912 2 года назад

Honest question from someone who is not an electrical engineer: Can you tell from the video that it is a 1N914 and not something like a 1N4148 and would either of those two be interchangeable here? (I'd presume so from Kevin's description of "any" signal diode, but figured I'd throw out the question since this is not my realm - thanks!)

@aa3konthego 2 года назад

With this experience, you should apply for a job on the bomb squad. What could possibly go wrong? 🤪 In all seriousness I've been starting to think about one of these amps for my 817. The internal construction looks very good.

@hamradiotube 2 года назад

Yeah right. I wouldn't want to ever see that magic smoke! It's a pretty cool amp. I've not used it too many times yet but I've been happy so far.

@JReed305 2 года назад

IT LIVES!

@hamradiotube 2 года назад

I know right?!

@JReed305 2 года назад

@@hamradiotube I am always amazed when something I put together works :)

@gregorykenley5997 Год назад

Mike - fellow hammers tell me that I should NOT directly connect to the MX-P50M and should use a Relay Buffer Interface to protect my Finals. Others say this was for older Amps? What are your thoughts about the need to use an RBI to protect my Radio? Greg

@M9A1MAN Год назад

You should sell a few of these already modified. I'd buy one from you knowing that you know your stuff.

@temporarilyoffline 2 года назад

Strong work Mike! Could you imagine you'd be doing this when you first got into ham?

@hamradiotube 2 года назад

No. Not at all. I just wish I'd have gotten into ham radio earlier in life.

@temporarilyoffline 2 года назад

@@hamradiotube yeah, me too!

@SmokeSignalsRF Год назад

Thanks for the video… Smokin’ Ape sent me

@hamradiotube Год назад

You should have already been here Don!

@The_Privateer 2 года назад

Here's a tip and a slightly different way that I did mine - make the whole thing **without** the breadboard and dip the whole shebang in liquid electrical tape or plasti-dip

@hamradiotube 2 года назад

You are a more daring individual than I good sir.

@anxanywhere 5 месяцев назад

Any schematic on what is being built? I'm looking at this amp for IC-705, its good to know that it can be improved to protect the radio...

@ryaneickmeyer6191 2 года назад

Hey Mike, I'm an electrical noob. I'd love to just order which diode you used. Could you let me know which one to order specifically? Which one did you use in this video?

@rickmckee6698 Год назад

I believe I would have tapped the DC source into the power switch of the amp, otherwise it will be live anyting power is attached to the amp. By going through the switch, it is off when the amp is off !

@Siskiyous6 2 года назад

I am now trying to figure out how the amp and a digirig can used on my 818 at the same time Mike, any ideas?

@HI8D 2 года назад

I need to boost my IC-705 for SSB POTA ACTIVATIONS. Should I get this amp or get another radio ? I love the IC-705, but may be a IC-7300 will work better after all. Thanks David

@hamradiotube 2 года назад

That's a tough question David. The 7300 is certainly going to be a better all around radio than the 705 with the amp. But the amp is only $200. You could always try the amp first, if it works, great, if not, upgrade to the 7300.

@HI8D 2 года назад

@@hamradiotube Thanks for the info. I do have a 7300 and a 9700 in the shack and happy with all 3 Icom radios. Is an additional gadget that will need to be carried and powered. I will think a little bit more about it before making a decision. Thanks.

@hamradiotube 2 года назад

In the mean time, just take your 7300 out with you. I do it all the time. I love it.

@danrgray633 Год назад

Mike, I cannot get it to work. After installing the mod, the amp goes into transmit when powered on (not attached to the 705 yet). I made 3 of the mods and all do the same thing. Any thought to what I'm doing wrong?

@AG8000 2 года назад

👍👍👍✌️

@Bill-HRT 2 года назад

I am guessing, somebody correct me please, that that one-pin connector is because you only need direct the drive signal though the plug and ground comes through another place like the antenna ground and you don't necessarily need it on the plug itself???

@hamradiotube 2 года назад

no clue