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The mrf 421s are an amazing transistor but sadly overlooked. This is the 3rd 10 pill, I've also done an 8 and a few 2 pills. I love these transistors.

Mobeel

I am putting together a 10x mrf421 this is the 3rd one of these I have done but decided to ask for suggestions on power wire. The first one I built, I did two strands of 6 gauge for the power.The second one that I built, I did one piece of 0 wire. They both worked like a charm but this time, I...

I still have her. I need to get back to it and re cap it. All tubes tested great.

Thank you

One more question, does anyone know the pinout for a dc power cord for this radio? I am doing some testing and want to test with ac and dc supplied.

Thank you very much. Merry Christmas.

I am trying to wire a silver eagle.To this same radio and having absolutely no luck. Does anybody happen to know the pin out. Same four pin lafayette comstat 35.

I was given a robyn sb520d along with a 30 ft tower and a radio shack ground plane when I was about 15 in 1993. I have loved it ever since.

It has not. I am going to get into it this weekend. Any advice?

My model t 40 channel just developed an issue, where when I key the mic all power falls out. So I key it and get 3 watts then in a matter of a second its dropped to .6 watts. Is this a tube issue?

Here is a new to me problem with the model T. I warm her up then key her up and.power drops from 3 or 4 watts to .6 and lower. Is this a tube issue? All tubes are lit up but clearly that doesn't mean a whole lot sometimes. Where should I start my search for the issue??

My swr was through the roof when I keyed up today. I found the wire to look like it was chewed..going to replace with solid 12g and see how it works.

Does anyone know the length of the wire to the ring?

Do you have a link I can follow to check out this variable?

Correction it is a 138a

Anyone know the variable to drop the dead key on this radio. 138 23 channel. Not "A" not "XLR" Old 138 23 channel.

Bake it with rf was the final solution after returning it to its mfj case. I cleaned it with dawn and water and let it sit a couple days. I would have to say that it did absorb some of the mineral oil and a slight bit of water. After returning it to its mfj case, the heat from running a 2x10...

I am clearly not as smart in the topic as you are, but I definitely have to agree with you.

I started messing with it again last night after reading this old post. I was able to get swr down to 1.5 before I called it quits for the night. I am left to believe it is something to do with the grounded end. I will tinker more soon and see what I can get.