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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.

I was told I could put my mfj-264 1500 watt dummy load in mineral oil and it would work. I had no luck just very high swr from the load. It works all cleaned up from the oil but did not work in the oil. What did I do wrong?

What are the ssb alignment pits for this radio

How did you make out with this. I just received a 138 with no mic and need a jack for it and the wiring. Do you know ow where I can get the jack?

Thank you.

What about cb-246 Sears roadtalker model 934.38270700. I promise that will be the last one for a week or so.

Man you are the absolute best.

In that case, I could also use one for the robyn sb-520d and the cobra 2000gtl.

Thank you very very much