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True Rick the Drake gear used carrier control output in the AM mode ( no agc when using AM ) and the amp really? thinks its looking at an SSB signal. I've done this too with? good reports. And yes

It is all relative. An Alpha 374A sold here recently at an estate sale for $400. I probably should have bought it because it was a working amp that I had actually used multiple years at a multi-op SS

Tim, You mentioned running AM with the L-4B and I thought I would share my experience running AM with my? C-Line.?? I think just about everyone here know that Drake used screen modulation with

Eric, About 3 or 4 years ago, I bought an L-4B for $700.? I got a really "smokin" deal? I would expect a nice L-4B to be worth around $1000.? Possibly more. About 6mo ago, a friend of mine bought

Hey guys, I have a perhaps silly question.? I am working to fill out my TR7 station and? found an L7 that is super clean, supposed to have had the PS rebuilt with Harbach board and good tubes.?

I’m not certain, asi have never hooked it up to a water source. It does carry a rating for dry use, so my guess is that it has a jacket around the resistor that doesn’t come into contact with the

What is the S-Meter showing as the audio drops? Barry - N4BUQ

Check the signal coming into the audio amp 6AQ5. Check the 10 uF cap on the cathode. The tube may be gassy and that sort of thing can cause changes as the tube warms up. Steve Wedge, W1ES/4 Time flies

I am fairly new to Drakes and antique radio repair/service and have now got two(TR-4 and T-4XC(w/R-4C) receiving and transmitting.? (In face checked into a net with each so very happy with that)These

Hi Bill & George How about injecting the Crystal Eliminator signal via the "XTAL LOCK" socket? The Crystal Eliminator signal via the "XTAL LOCK" socket must be AC-coupled via a 1 nF capacitor - and

The earlier amps were built under the 1 Kilowatt DC input rule, which translates to 600-ish Watts CW output. That's what they would have been doing in the ads run during that period. A 1500 Watt

Any demonstrations I saw at Dayton were sending dits. Rob, NC0B

Like Rob said, Alpha did market their own dummy loads. One was a Model 2000, and the other was a Model 2100. Both were capable of 6KW burst of between 1 and 2 minutes, and both were capable of 1500

What they didn't say is the key was sending out dots not a constant signal. That information came directly from Alpha 10 years ago. Tim WB8UHZ

For amp testing I use either a 1KW Bird oil-cooled load or the Altronic Omegaline shown below.? It's a compact 5KW no-time-limit test load, good up to 2 GHz provided there's ample water flow.? At

Mine is 600 Watt CCS oil cooled. There is a note in the Bird catalog that the oil cooled loads can take a 10 dB peak to average ratio. So in theory I could hit it with kilowatts for very short

Remember Alpha sold a legal limit dummy load. There was the original and then a follow-up version. Rob, NC0B

Too bad they couldn't have simply connected it back to the local electrical grid and called it a wash. Barry - N4BUQ

I was lucky a couple of years ago, when I was helping a widow with her SK's ham radio gear.? I was able to get a like new 5 kw Bird dummy load for $600.? She was happy, I was happy... I guess I need

Does it take flowing water or only have a reservoir? Water cooled tubes needed distilled water or better. Very pure water is a good insulator. If this needs distilled water you could not just hook it