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I'll agree with VK4TUZ on good experience with RF parts.? I needed 2 3-500Z tubes for a Heathkit HL-2200 basket case that I restored.? After looking far and wide, I found all sorts of price

FWIW, contact Tom, W8JI at CTR Engineering.? From what I understand he has tubes F/S that are tested by him to make sure they are working. https://www.ctrengineeringinc.com/ 73? Andy? K9ATX -- "

Hello Group, I could use your help! Looking to pick up a 3-500ZG replacement for my AL-80B.? My choices are: RF Parts Company: 3-500ZG (6-month warranty). 250$ (China) DX Engineering: Penta Labs RF

Sorry, I don't have any transformers for the 30L-1. Tom wrote:

Bill K3HZP, Contact Heyboer, they have all the PWDahl specs and can build a PWDP13170 cheaper than a rewind. They did a Globe King 500A modulation transformer for me and it's great. 73 Bill N4LG

Nationwide radio has a good selection of Collins transformers but it looks like they currently do not have one for the 30L-1. Peter Dahl makes a replacement p/n **** PWDP13170 **** -- 73

Hi Tom,? I am looking for a transformer for a 30L1 amp that I am repairing for a SK's widow.? The current one appears to have a short and blows fuses.? You mentioned having Collins parts.?? Any

Thanks for all of the reply. I will check the connections within the tank circuit. The band switch looks OK but I will investigate closer. Band switch is in the correct position when testing. -- 73

Is the band switch in good condition, in the correct position?

Nick,it seems as though you may have a poor connection somewhere inside the realm of the tank circuit. ?This could be at the band switch, the connections of the coils to the variables or just about

All, Question for the group. I am working on an Ameritron AL-80 (not A or B). When tuning it up I run out of load. I max the load cap out at zero on all bands. (fully meshed/max capacitance). It

“Although it’s a handsome looking amp it’s certainly not the best performer in its class. It lacks inductance on 160 and the tank isn’t so good on 15 and 10”. So true, Louis. As Jim VE7RF

TenTec buit?their own variable capacitors. ?So their plates are unlike any others. ?I have some plates and if you want you?ship me the cap I’ll rebuild it for you. ?I should have a few plates

Hi ALL, I have amongst my Henry Amps a 3K-A. (My 3K-A was manufactured in 1972 and still works well.) It has the plate current relay in the B- lead to trip on over current above 1A. 5.2 ADJUSTMENT OF

I have a lot of parts for amplifiers and stuff. I handle estates for the local ham club and have processed estates for several Collins Radio engineers. They collected lots of parts over the years. I

Thanks Steve. I do not any of the power supply, just the RF deck, but did work it and it pulls in at just under 22vdc -- 73 Nick KC0YKO

Thanks Chuck. I was clearly over complicating this just because I did not recognize the "plate circuit relay" terminology. You were correct, I rolled the variable power supply up and it pulled in at

Hal, Thanks for the reply. I do not have the power supply, just the RF deck. -- 73 Nick KC0YKO

Perhaps that relay was used in that application in an effort to reduce the voltage/current to operate it to low values, such as from a later-model (but older) transceiver with limited T/R relay

Dear Nick, My GUESS is the P&B magnet is 24 to 28 Vdc. However, if you trace the wiring to the coil, back to the power supply, you may there deduce the coil voltage by energizing the xfmr primaries.