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Lionel: Thanks for the info.....this one got me snooping around a bit. Check out this link first: *https://antiqueradios.com/forums/viewtopic.php?f=5&t=200351* I cannot reproduce what you see (rise in

Look at http://www.radio4all.se/sdxa/R-4C%20Filter%20leakage%20problem.pdf This may not address your problem, but in any case I am sure you might find it interesting as might others. Regards Martin,

The old capacitor checks about as close to the stamped value as one could expect. It's stamped as ".5uF" and my inexpensive component checker showed it to be 500nF and some change. Very close. ESR

Sola transformers also have capacitors. If the value of the capacitor changes it will change the regulation and may make it run hot. I have had a couple of CVTs, not Solas but other makes, go bad in

Michael: It certainly acts like it could be a fundamental.? With 1V P-P 18mhz signal applied to one lead and the other lead hooked to the scope, it produces a very clean and stable waveform of

Hi Steve, It's S/N 22970 and the schematic show a number of the Drake revisions.? Yes, this is a 6EJ7 3rd mixer.

Looking for some help with an older SOLA CVT. Please reply off-list if appropriate but others may be interested. I'm working on an ancient VTVM, a model 800A made by Technology Instruments

Lionel, is this early or late design (i.e., does it have the 6EJ7 third mixer)? Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent from ProtonMail for iOS

Rob, even with that other tube, the power out seems low. I’ve worked on AL-80’s and they put out at least 500W (closer to 700, actually). Something else is wrong. Is the output this low in all

I've seen an article about this topic and unfortunately cannot find the document. The receiver has been "on the shelf" in an air conditioned shack for about 20 years and now I've been going through

John, Correction concerning series resonant overtone specification: the 2-B manual clearly specifies third overtone for all crystal frequencies at and above 18.0 MHz on page 11. 73, Michael Smith

Here it is and this is good stuff. https://www.kester.com/products/product/88-flux-cored-wire On Thursday, April 22, 2021, 8:51:18 AM EDT, amfone via groups.io <amfone20000@...> wrote:

Isn't there a Kester 88 too which works very well? TimWB8UHZ

I have a new on from RF-Parts. Got it to build an amp and never did. PM me.

John, Additional thoughts concerning my reply yesterday: Concerning the greater output of the oscillator with the new crystal, rather than a fundamental-optimized crystal, I expect that this new

Kester Solder is now owned by Illinois Tool Works (ITW) For a number of years, Kester sold Pocket Paks for Electronics Hobbyists, in smaller sizes. NTE asked Kester to continue this product line, a

I have? 3? x? 1 lb rolls of the old stuff...and a bit left on the end of a? 5 lb roll.? ?I shoulda snagged some more when I had the chance. The new? rohs? compliant stuff melts a full 38 deg

Hi. As per title.... I am looking to buy a good working 3-500Z. Someone who may have one in excess to his needs? Will pay via Paypal shipping to Miami, Fl. This is for my recently restored Drake L75.

John, Sometimes more is not better. ?As you are seeing a significantly larger grid-leak bias magnitude, this indicates the feedback voltage to the oscillator grid is larger, which indicates the

Alpha Metals has a 60/40 rosin core solder available through Amazon. I just bought a 4 ounce spool to replace Alpha solder purchased many years ago and it appears to be the same product. According to