MX-P50M Keyer Mod and Installation for Icom 705
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- เผยแพร่เมื่อ 15 ก.ย. 2024
- 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: / loughkb
Kevins design video for the circuit: • Ham Radio - Modifying ...
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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.
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!
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.
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
As a visual person, who doesnt always understand a schematic.. this type of video is well appreciated!
Thanks so much, glad it helped.
Excellent job Mike, and cool that You gave Kevin and your buddy the credit for the info and parts!
Thanks Chuck!
Clean demonstration Mike. Very well assembled process and photography. Thanks to you and Kevin for helping all hams. 73 OM
Thanks for watching
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
Liquid electrical tape is really good for keeping the magic smoke out too :)
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!
Now you can just put the USB-C replacement board in the 705. The replacement board has more protections on the key circuit.
Mikey...thx for being awsome. You got great soldering skills...looks very professional and save. 💯🎸🤘🍻👍🙋♂
Nice work Mike! The 705 and that amp are a heck of an awesome minimalist setup.
It sure is!
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
Thanks Don!
"705 Alive!" This is the soul of amateur radio ... experimentation and building things! Keep it up Mike! Nice job Sir! 73 - KF6IF
And not blowing them up!
@@hamradiotube that's when you practice the other part of the "soul of amateur radio" ... troubleshooting and repair! 😋
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...
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.
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.
Mike that diode is a 1N914 general purpose diode
And BTW that is a “signal” diode (not single)
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!)
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
Great video. Thanks Mike!
You bet!
Moar power! Great video Mike.
Exactly
Nice job Mike.
You should sell a few of these already modified. I'd buy one from you knowing that you know your stuff.
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?
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
You are a more daring individual than I good sir.
Strong work Mike! Could you imagine you'd be doing this when you first got into ham?
No. Not at all. I just wish I'd have gotten into ham radio earlier in life.
@@hamradiotube yeah, me too!
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?
Thanks for the video… Smokin’ Ape sent me
You should have already been here Don!
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?
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???
no clue
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 !
IT LIVES!
I know right?!
@@hamradiotube I am always amazed when something I put together works :)
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
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.
@@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.
In the mean time, just take your 7300 out with you. I do it all the time. I love it.
👍👍👍✌️
I thought 705 had keyer?
this is to key the amp safely. Has nothing to do with CW.
no schematic....