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That Drive control is a matching control, not a level setting control. It should be peaked for max, not set for a desired output level. as can be seen in the diagram below, it is matching the output impedance of the two driver tubes to the input impedance of the five final tubes. LC

wow! thank you Danzik and Nomad for all that info! it is very appreciated. Now i just have to figure out what tube/tubes i want to run. i do have a 6 volt 20 amp transformer lying around somewhere... LC

Sorry about the confusion, this is the relay i need a part number for. thanks!!!

I think all the tubes should have a parasitic setup on them, but i believe that mine looks exactly like your pic shows, with one tube not having one. As for expected power output, when i bought mine on ebay 20 or so years ago, i used it without even opening the lids, and i believe i was getting...

To bring this back around to Secret Squirrel's original question; one thing that hasn't changed is that when kids get around 14 years old, they are exposed to more adult conversations and topics. When you're 8, and your parents are talking about politics at the dinner table, you don't even have...

Holy Crap Danzik! that's the first time ive seen another Eagle VIII in over 20 years! Its the only other example ive ever seen really. For the benefit of the forum, and future searchers, can you take some internal pics? Close ups of the PC boards tops and bottoms would be beneficial for me...

thanks to both of you for the replies! Looks like i saved some money at least LOL. Ranch55, are those the chokes you are using for replacements in texas stars? also, knowing that you've done a lot of work on these amps, have you ever seen R5 and R6 removed? LC

Hi all, I've had to replace these before, but it's been a couple of years now, and apparently they are not available right now. So i found these JW miller chokes and am hoping to use them as alternates...

C23 will affect AGC timing. might be worth checking. LC

this stuff will soften the glue so you can remove it. https://www.j-tron.com/product/radio-tv-cement-solvent-10-312/ it's best to unsolder the components so you can get all the glue out. it likes to hide underneath things you cant see. LC

not sure what datasheets you were looking at but the 1969 and the 2029 are both BCE transistors. no need for any pin switching here. LC

great perspective being given in this thread! i'd like to say that anyone who hasn't clicked on the Adam Savage video in Brandon's post is missing out! that video is F@#&ing FASCINATING! LC

Agreed! I interview people for this type of job and it is amazing to me what the kids who come out of college DON'T know about electronic and mechanical systems. Ive recently had someone with an electrical engineering degree not be able to tell me the difference between a stator and a rotor! LC

trying to fight automation is a losing battle. can anyone think of one time in history where technology was eschewed in favor of tradition? it never happens. This is John Henry all over again, and all the people who work in trades like horse-shoeing, and wagon repair had better start looking...

um, look two posts above your original post. that is the mod you are looking for. LC

thanks for the reply. I think your problem is with the radio, the power supply supplying the radio, or the power supply in the amp. what power supply are you using for the radio? has the radio had any mods done? do you have a way to check the input SWR? (SWR meter in the radio would give you...

AK321, your statement is a bit confusing. you stated the drive to the amp in PEP numbers which are peak modulated power, and then noted the deadkey coming out of the amp. i think you had the deadkey on your radio set at 5 watts, and then tried 2 watts. what is the deadkey set at on the radio...

you said the amp was new, but mentioned the previous owner. did you mean that it was new to you? also, a 5 watt deadkey is too much for the two pill section of that amp. try it with a 2 watt deadkey and see if that improves anything. LC

what radio are you driving it with? deadkey and swing wattage? any mods done to the radio? LC

Listen PP you're going to have to get some thicker skin if you want to play radio. Im just messin' with ya! and so was Jeff. I'll listen to the show, but it would be good if you could post freqs and times here. even if it has to be short notice, it's better than guessing. LC