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Nice catch Giuliano! I wonder if you had a component with a bare lead too close to the back of a female connector somewhere. The male Molex pins are very long and can protrude from the rear of the

Richard and the gang I remove (electrically) the old cap out of the circuit before tack soldering in a test capacitor. The test capacitors were quite a bit out of spec (I used a 47mf instead of the

Can you explain "cartoon insulator" please? Thanks. Dave

I bought a set of boards from Mike last year as well I ordered and have all the parts to build it. But have been too busy last year hoping this nyear. Idoes use relays to do the switching. 73, Jim

*** I like this video better: https://www.youtube.com/watch?v=-UEfqAWb3fE It goes into some detail about the techniques and materials, almost enough so I could imagine doing it myself. - Jerry, KF6VB

Last year I sold about 25 home made tubes of all types… Gary W0DVN

Greetings in the New Year fellow Drake enthusiasts! All the conversation about Vacuum Tubes reminded me of a video I saw on Youtube back around 2007. It involved a French operator (Claude Paillard

*** Especially the current version of the DeOxit can, which comes with a BIG straw. I have been using the (expensive) needle tip bottle. Often, I use the needle tip to load a Q-tip, and then apply the

And some of us ARE engineers and still appreciate the insight! 73, Peter VE7PS U of T '77 Geol. Eng. [email protected]> wrote:

By tacking in the capacitors do you mean you just paralleled them with the old ones? If you did not disconnect the old caps their leakage (parallel) resistance would still be there. When substituting

Just a guess, Mike, but you may have put a good cap in parallel with a leaky cap and ended up with a good leaky cap! Bob K9JU

Hi Guys My two cents on the root cause is that maybe one of the capacitors in the old can was short circuited. Placing a functioning capacitor in parallel will still result in a short circuit. After

I’ll lay claim to having been an engineering tech. I worked as a non-degreed engineer in several gigs. Design work was never my forte. Testing is where I did a lot of work and I really had a knack

Your welcome, John! The antenna switch uses an early stepper motor. I recall that Mike was thinking of making an adaptor that would have allowed use of a newer antenna switch (like a MFJ or some

I may have simplified this… when I was working on the receiver, I tack soldered some electrolytic capacitors in the power supply, still had the distortion. New cap came in, removed the ones I used

Yup, that’s what happened. And of course when I tack soldered in some caps to check operation, I had the distortion. So, when the new cap went in, it’s gone. I’m thinking it might have been a

Many of us ARE engineers, and we appreciate the insights! Being an engineer means that you know enough to know you don't know everything. 73, Gary WB6OGD

Clean the switches. You will find lots of info in the group message archive. I usually use a good non-contaminating spray or a DeoxIT cleaner in a needle tip bottle, followed by application of DeoxIT

David, Consider everyone’s response, so not to be offended — no one ignored you; it may seem that way, though. ? We all learn from all the posts, no matter how much experience we have or

Absolutely. Many of us are non-engineers and appreciate the insight. Steve Wedge, W1ES/4 Time flies like an arrow. Fruit flies like a banana. Sent with [Proton Mail](https://proton.me/) secure email.