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There's one thing that maybe should be kept in mind about what people may be using to drive their L-7 or L-4 /L-4B when it comes to ICOM transceivers. I'm not sure that everyone who uses ICOM radios

*BUT PLEASE start a new email* with the proper subject Bob. Thanks Jim W7RY -- Thanks and 73, Jim W7RY

Ryan NV5E writes: Ryan, if you can, pop the covers off the tx and rx and get some (high resolution and well lit) pictures of the top and bottom chassis of both, then post those to the list. Just by

Bob, you're in the right place! Question away! John

Well hi y’all I see the discussion is about Drake HF radios I was directed here to look for assistance with a Drake UV3 So once again I will ask can anyone refer me to the correct group? Thank you

I would toss the silly 1/2 wave rectifier and at least use a FWB? or a FWD, depending on the application.? ?That 22 ohm resistor is not going to do much to speed up the RLS time, it's value is too

Yes, I measured my keying line carefully before hooking up my first solid-state transceiver to my L4B.? The keying line had a measured 60V spike caused by the relay coil. I chose to add an

When I first hooked up my IC-7610, I measured the voltage on the L7 before connecting and have been using the pair since I bought the 7610 last year. I also checked the rating of the 7610. Use the FET

Jim that's good to know. Thank you for that information. Joe ki5o

If you cable the MUTE connector on the RX to the RCVR MUTE on the TX that will take care of your Mute function. You need to set the Function knob on the RX to EXT MUTE. You also need a cable between

I don’t know what all else is inside. I pulled the cover off the receiver the other day, just to take a look around. I like how it’s all copper in there. And thanks for the heads up on the voltage

Ryan, Welcome to the group.? You have a great rig there.? Your are getting excellent advice from this group, there are many experts on here that will get you any help you need! In addition to the

Your 4LF looks a lot like a 2LF built on a better PC board. 73 -Jim NU0C "Ryan NV5E" <ryanjones2150@...> wrote:

I also note that the recv mute is not connected to the transmitter mute. This may explain why you do not have audio. If you do not have the cable to connect then make a shorted phono plug and place it

It most certainly is true. The L4B and the L7 do not need a keying relay between the radio and the L4, L4B, or the L7. I just sent out a new message. Jim W7RY

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