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The Drake L-4B has 1000 watts PEP power input on AM, CW and RTTY and 2000 watts input on SSB. It covers 80, 40, 20, 15 and 10 meters (10 meters not available on late production). The high efficiency Class B Grounded Grid Circuit uses the new Eimac 3-500Z zero bias triodes. Power requirements are...

so far so good , new set of tube from ameritron with 40w dk i get 350-400 on ssb and the radio with the mod is working nice , i got nice combo. thank you for the help again (y)

My radio now is working on AM. just go menu U-70 and turn on that it. nice 25 watts just to tune the amp. filter yf-116a

The heater is ready. Again thank you BJ, radionut, and Justme. Everything is working as intended, I’m going to try and get a new matching tube set. Radio - Amp 20w - 200w 30w - 325w 40w - 375w 50w - 410w 60w - 430w

Let me test it tonight, if every thing’s ok I’ll buy new match set of tubes from rfparts about 110.00$ Or maybe 572B

Back on the game

Bad news :cry: :mad:

No TX on CW only SSB and I used 1000 hz tone radio does 60 watts DK with 140 pep . In the radio the hf pot is set to protect the amp. It fun do :).BJ radionut thank you again

Radio do not tx on AM,CW,FM only TX ON SSB USB/LSB. WHEN THE PTT ON AM ERROR

ok here we go, amp is conneted to the dummy load, on 10M. radio on ssb(rf pwr knob at 2:00 oclock) with 60 watts pep just talking ,making sure the signal passes:) the amp,now that the amp is on I see about 180-200 watts on MTA-20 meter from the radio shack and when I pushed the proc key on I...

BJ radio nut now I know why you like that radio . Because it has 6 meters on it

BJ radio nut .Thank you for the help I keep post it the result .I love that radio .like new the coolant fan is clean

Not really you can ask tecnicoloco I did dx. With the radio only about 2k milles

How about ARB-702 to the radio where I connected and the internal relay on the radio on/off position thank you

1st time playing with fire .I hope you can help me on this experience. The amp has 3 new bulb A811a and wend i turn on. I have 1.8 plate voltage on STBY. Thank you in advance.Also I need to know is the ARb-702 box run with 9-12 volts .o if I used de grey cable only with pin 2 ground,pin 4 red ...

the code is 1984129 it work for me. ssb (usb/lsb) ok but no Am,cw,and fm. on AM tx ERROR

So I want to ask you about dip meter kit for?

Loose cannon I am and trouble my wife is not happy.i did not bring any baby clothes at all.:D

I stopped by today on a garage sale and I found some ham radio treasure from ft-920, al811, low pass filters, Alonzo dr140t, microphones, whole different bands/antennas, balun kits, amp tubes, antenna rotors, antenna books cubical quad arrr antenna books from 1974, and more. tomorrow I will...

This is my antenna