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The drake (both the L4 and the L7) use a 22 volt ac transformer winding for the relay shown below is part of the filament transformer, and showing the winding that is used for the PTT relay power

Judging from the dust on the knobs, it looks like it has been on the shelf for a while. If you have a varac I would suggest for the first time you power it up, use it. May help to save some

I heard somewhere that the L-4B’s keying relay is only around 30V. Can anyone verify? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from [Proton

It’s rare but not sought-after, really — at least not in the US. There’s a lot of that with some vintage gear. For example, I have a TC-2 that came with a B Line that I bought a few years ago.

Hello Joe! The ARB704 interface that you referenced performs the same function as an internal soft key to install in the L4B. Both are intended to? protect the newer rigs from the higher keying

Hmmmm… Joe…Why? I have a TS890s and for 6 months drove my L4-B with it. Granted I did use an Ameritron ARB704 as an intermediary. The only mod to the amplifier was running a Peter Dahl transformer

A lot to unpack here already, boys. I appreciate it! David, I may take you up on that invite....be careful what you offer! I wasn’t planning to drive the amp with another radio. If I end up keeping

Ryan it sounds like you have a great set. My only worries are making sure you have a soft key board installed on the L4B if you are using a newer radio to drive the amp. These lots of fun to learn

Ryan: I back up the good advice you have been sent. Get the manuals on each piece. It will tell you how to interconnect them together. Start with the receiver and check that operation. Learn what to

And the amp goes for many $100. Sounds like a nice rig...the receiver probably just needs a shorting plug in the Mute socket.. 73...???? Mark??? AA7TA

The guy offering 100 is a moron and trying to take advantage of you! Power supply alone goes for more than that.

Thanks for the swift feedback guys! I’m on duty at the fire station today, so I have limited time to check on the thread here. I’ll follow up later on. Y’all are giving me some great info

Congrat's on getting yourself a gem of a radio! But first things first -- tell the jackass that offered you $100 to take a sweet flying f***. As a very rough ball park, an AC-3/4 power supply sells

Yes, those convertors are rare in the US. Most of the ones I've heard about are in Europe/UK because they have LW broadcasters there (or at least they did back then!). I'll take this opportunity to

There's a Drake 2-LF, a low-frequency converter for the 2 A/B/C but not sure if there was a 4-LF. Thanks, Barry - N4BUQ

Ryan: I am about 4 hours from you in Covington, LA. Package it up and come over and I will help you in any way I can. Assume you have all the manuals and stuff as that. Not sure what that plug in is

New to the group and I just came into an old Drake 4B set. This radio set is super cool, turns on, transmits (although I don’t know where) and the amp is pristine and quite easily put out 1kw when I

Tim is right!? You have to tune to one side or the other (sort of like FM Slope-Detection) Even doing that, it's not really going to sound all that good. You really need a 6kHz filter (or maybe a 5)

Rob what you described other than what you call "distortion" is caused by the AM signal passing through the TR4C's 2.4 KHZ SSB filter, even the Drake manual says to tune off the signal to the best

Dear Group, Now my T-4XC project is fininshed (for the moment :), it is time to tackle problem in my TR-4C. Or maybe there is no problem...., just me expecting too much?.? It's the audio quality in