Hello all, Need some input from the brain trust. I recently acquired an AL-1200 amp from a non-ham third party, that got it from the estate of silent key. I think he was a relative, or at least a fam
Hello all, Jim is right I didn't mention what band. I guess I was biased toward it being the output relay. It was on 15 meters so I would not expect there to be any padder caps there. Have been getti
Jim, That's not exactly what I said, but exactly what I intended to do. Steve <Hello all, Jim is right I didn't mention what band. I guess I was biased toward it being the output relay. It was on 15
Well, nothing is ever as easy as it seems it should be. I opened up the AL-1200, and instead of finding discrete INPUT and OUTPUT RF relays, I found a small board assembly. Went to the schematic in t
Hello all, Good news, I guess. That mystery board is a sophisticated T/R board assembly that was introduced many, many years ago. It still is not documented in the schematic on the Ameritron page. Th
Hello Merv, I understand the concept, I just didn't know of any amp mfgr doing that. That one is toast. I could easily make one out of some copper I have and re-install with a 'just slightly' closer
Hello all, About 10 years ago, I built two 'boilers' for GS-35b tubes, totally for the heck of it. To date, I have not actually used either one, as building a new amp was not high on my list of thin
All, I just realized that I could use my Hi-pot tester to test things and help set it up. Steve _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont
Not necessarily against it, but because of the viscosity, I'm reasonably sure an aquarium pump would not work. There's a wide selection of aquarium pumps out there to choose from. Keep in mind, tha
Hi John, Thanks so much for your input. This is exactly the kind of info I was looking for. I'm familiar with the Pex tubing, but never thought of using it. It sure would hold it's round cross sect
Hello all, Over the last week, or so, I seem to remember 'glossing over' messages and seeing some comment, by someone, mentioning that 8410 Alpha amps have some circuitry that tends to limit their ou
Hi Russ, I'm not really concerned about the extra 200-300 watts. I've been using them like this for years and all has been fine. I was just wondering, if they are using some power 'fold back' circui
Hello Jim, I have several of them and it's all about the same. Plus/minus on different bands, but quite similar. I've had several people suggest it's because the screen voltage is only 200 volts. 73
Hello all, Can anyone tell me who it is that has the LED bar graph displays suitable for retro fitting in a home brew amp? I've seen the stuff in the past, but can't locate it now. 73 de Steve, NR4M
Hello all, I've got a very late model, pristine, Alpha 77DX/SX, which was originally a DX model. The modification looks 'factory', because, I assume, someone used the factory parts. Don't know it's
These are TWO rf decks using ONE HV power supply in a SO2R situation. Sent from my iPhone _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting
Hello all, Has anyone on this group had a tube(s) rebuilt by Econco? Will they work with the 'average guy'? After all, money is money. I've sent emails to them about rebuilding a 3cx1200A7 and all I
Larry, Unfortunate. Some have mentioned they may not be rebuilding tubes below a certain plate dissipation. Maybe so, but they should at least tell me to 'go away'. Someone is rebuilding these tube
Hello all I recently saw something, somewhere that Alpha was barely existing. Does anyone know if their service is up and running? I have two 8410s down for different reasons. Is there anyone on the
Everyone, Glenn from Alpha has been in touch with me and has given me things to try. And, have been in touch with Bruce. Both of these guys have been very forward leaning and helpful. In CO, the stat