Search results

It is being keyed with an external keying circuit. I drive it with an older tube linear. And they are keyed with the same controller. The relay is pulling in on both driver and main amp.

99v Is a oldie but goody. I inherited one from my late uncle. Had bad frequency loss and drifting issues. Turned out to be two problems. Bad solder joint on the 10.240 crystal and the channel selector needed to be cleaned. Works great.

Ok, another issue popped up. Looking for Thoughts. I was running this amp and working fine. Took a break and come back after a few minutes. When keyed down it has no out put and blocks all drive watts. Turn off the amp and it passes all the drive watts. What would yall think could cause this...

Thanks for everyone’s input on my amp. I have been using it regularly sense the repair. Seems to be fine. I seen a video from BBI on a 64 pill and got a bit confused about something. The amp he was working on had no output combiner resistors in it. Said that was fine. Has anyone seen amplifiers...

53 myself. Moved to Ider Alabama with no phone lines in the area. So I made CB my main source of communication in the early 90’s. Reconnected with my Uncle AKA buzzard. And reignited my hobby. Channel 31 is the local channel here in north Alabama and southern middle Tennessee. 73’s cheers 297...

I touched up all the solder joints around the 10.240 crystal. And the jump to 24.xxx has stopped. But I have noticed I can push in lightly on the channel selector and it will drift away from the selected frequency. It comes right back on frequency once it makes good connection. I inherited the...

I have been following this for several days. Mine will be fine, receive and transmit. Then it will jump directly to 24.xxx. Sometimes it will just begin to drift down to 24.xxx. 99% of the time I can bump it on the bottom of the case and it will jump right back in frequency lock. Can a bad...

Our local group around north Alabama and southern middle Tennessee run. 27.315. Where are you located? Maybe we can make contact. Cheers. 297 Red Dog north Alabama.

Update on amp. Used 6 regulators instead of 3. Do each fan has its own dedicated regulator. Also used some aluminum plates for heat sinks. Replaced the one bad pill. Seems to work well. Thanks for all the advice. Greatly appreciated. Cheers!!!

What’s your opinion on the HGs? My thoughts was buy one of the China knock offs Toshibas and hope for the best. If that don’t work. I’ll save up for a matched set of HGs.

Correction 2 resisters on the combiner are smoking. And it’s being fed in the middle of the two that’s burned. That feed comes from that transistors.‍♂️

One of my resistors on the combiner gets hot on key up. And one of my 10 ohm resistors on that pill burned as well.

before I put the cover back on, I tested the fans with a12 volt power source. All 6 fans are toast. So it looks like it will be getting 115 ac fans. And that’s not all the collateral damage. I have 1 of the 2879 transistors that isn’t balanced. I’m sure they have been replaced already once with...

One last question. You can see it’s a straight 10 pill SC2879 Toshiba red dot. What is a good safe amount of wattage to drive it with?

Awesome. I thought about adding a 110vac relay and triggering it from the main power switch to turn them on. However I would like to keep all the components original. Again y’all have been super helpful. Thanks again.

I forgot to add on my last reply that they had the heat sinks on them I just removed the while I was working on them.

Roger that. Thanks. They are 12 volt fans. The 21 volts I have access to in the amp will over power the fans right?

So initially as soon as the power was turned on the transistors that turn on the fans would smoke. Once I lifted the leg of those transistors my short went away. And the amp powers up fine now. I think those transistors for the fans are just switching transistors. I’m going to try and order the...