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Jim Shorney writes: Oh come on Mr Grumpy, the C-7 finally met its soul mate. That deserves a picture :-) --lyndon

Quote from another forum: I bought a radio so I could talk to other people on the radio about the radio I just bought. 73 -Jim NU0C "Lyndon VE7TFX" <lyndon@...> wrote:

If anyone is interested, "ice blue" LEDs are now available that are a good match for the correct Drake aqua blue gels. I recently used one in my TR5 to replace a #53 lamp. LEDs surround the top

No, L211 and L212 would not do that. They are parallel resonant circuits to peak the third harmonic of the crystal. They will not change the frequency. Apparently you are missing the 10 Hz steps. From

About 18 months ago, when I acquired the mythical C-7 console, I predicted a TR-7 was in my future if I did not find a C-4 replacement front panel. It turns out I was right :-) --lyndon

Since today is apparently fun with L7 pictures day, I thought I would post this. L7 owners, you may want to check your filament choke connections occasionally. These are images from the amp with the

I could try that I suppose. I have some cool whites somewhere. This one is pretty bad. Attached pic is with warm whites behind. Before anyone says anything, the meter is off-scale left due to a static

And attached are two de-yellowed images, 24 BPP and 1 BPP. Either would look good printed actual size. 73 -Jim NU0C "Jim Shorney via groups.io" <jimNU0C@...> wrote:

I have an outlier L7: one meter is normal and the other is "yellowy" I have reduced the apparent difference by using a "warm white" LED behind the normal one and a "white" LED bulb behind the yellow

OK Guys, STOP. We have a good image of the scale. Mark just needs someone to PRINT it to scale for this amp! 73 -Jim NU0C "Bill Leonard N0CU" <billincolo73@...> wrote:

Richard, What is it about those HP meters that have them listed on eBay for 3x more than what you can get a nice HP 8640B sig gen for? Also, what is the input impedance of a good VTVM? I have tried

Mark, If you don't get any responses, I think that I still have a copy of the program that was on the software CD that came with the ARRL Handbook years ago. It allows you to print a new scale for any

Congrats. The Alphas, generally speaking, are more robust amps. Although you do have to take better care of the grids in those metal triodes. 73 -Jim NU0C "K8CCA" <echapm4@...> wrote:

Mark: I have to wonder what causes SOME L-7 meters to discolor this way? Back in the early 90's, after getting my 1st L-7, I found a bunch of spare parts for sale which included a brand new pair of

I have a very nice Drake L4B HF amplifier I would like to offer for sale. The amp is in very good condition. The amp has been upgraded with the Harbach ES4L4B Soft-Start/Soft -Key /Bias Module start

Hey guys, didn't buy the L7, but came home with a Alpha 87A. Was a great price and I could not pass it up. So I am going to sell my L4b. If anyone is looking for one it's been recapped with Harbach

Hello,Can anyone print me off a white copy of this meter scale from the L7 so I can replace my yellow version? I'm not sure if it needs to be on paper or plastic? Thanks, 73Mark?W0NCL?Sent from my

Just finished the full alignment.? All frequencies and voltages look great. The only problem is that when tuning, I cannot get the 100hz digit on the TR7 to increment and then it will advance by

I don't follow Mr. Carlson. It sounds like his super-probe is nothing more than a signal tracer. Signal tracers were common service instruments for years. An AC detector on a small audio amplifier

Test equipment is another hobby that comes directly from the hobby of amateur radio. I also worked in electronic hardware for decades and even in a metrology lab for a year or two. Now that I have