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Here's a scope trace of sending three dits at around 25 wpm. Note the shortened length of the first dit and the lower output level compared to the second and third dits. Here's how three dits look

This problem has been resolved. One of the things I'd been meaning to do is to install a choke in the SX-117 power supply. After installing a 5 Henry choke in the supply, this problem disappeared. 73,

Repeating my Feb 15 attempt to get image thru the new GIO I will delete this message if it fails but the an other very important thing is IN THE MANUAL [ edited from the BAMA manual] …. and it is

I don't see where zero-crossing voltage is a problem since it only happens during application of AC power. There is no collapsing flux since it hasn't been established. The SSR's during turn off,

Ahh… my bad. Yes, I mis-remembered the manual admonition. What I did do to blow it up, though, was what I described. So maybe there is some extra stress with the off and rapid on, or maybe it failed

So I had a look at the transformer in detail this morning. Since its open and therefore 'garbage' there is nothing to loose, right? Carefully peeling back the layers the first thing I found was that

As more zero voltage crossing SSRs are installed to power ON these radios, it will be interesting to see if there is an increase in power transformer failures due to corona discharge (aka wire

Randy, I have to apologize for taking the discussion away from this and I have to say I have the same question too! The "Caution " (page-6) is to momentarily pause in STBY before turning it off. Is

Don, it might be a "Dream"!! I looked back to see if I mentioned a sales price for them. Maybe you can point me to the message number? I did say they're pretty expensive and looking just now at Mouser

Hi all, I’ve been silently following all the HT-37 xfmr discussion. I am the one who started the whole explosion of comments, tests, theories, etc. a couple of months ago. Ultimately I gave the

Well Rick, back a little you mentioned 300+ bucks for one but maybe that is a dream? How did you determine that switching ON is what wrecks the switch, not switching OFF ??, I worry about contact

Don, Are you asking which solid state relay I am putting in my Valiant? I only suggest using them in place of a "step-start" circuit since the only thing a step-start protects is the ON/OFF switch and

Finally got back to looking at this problem. In short, the problem is that when sending CW in what Hallicrafters called "break-in" mode (Operation switch in VOX position), the first dit or dah sent is

First, let me apologise if I have caused some confusion. The center wire I am referring to is on the 6R7 side, not the 6V6 side. The 6V6 side does also have a center wire as shown in the diagram below

Jim, going back some years, MOST situations outside of equipment had thermo-magnetic trips to protect from overloads as well as short circuits. But yes Some large breakers were magnetic, with a

DonThere are typical specs for a particular class of circuit breaker and then there are worst case general specs for all circuit breakers.?? AFAIK, there are two types of circuit breaker, thermal

JohnYes, the Hammond 124A looks fine, don't know about the mounting hole spacing so perhaps a new hole is needed?? Strange that the shield terminal is between the two secondary leads.?? You might

Jim, interesting, and I get the jist, but I wonder what the point is. Anyhow, as I read stuff, #18 copper will melt [1000 C nom] at 83 amps yes ,but that happens in 10s , not 2 minutes. That would be

John if you really expect it is going to a shield, perhaps try measuring the capacitance to various winding leads. Just a thought out of the blue. don Sent: Saturday, July 13, 2024 9:36 AM To:

I solved it this way with my Sx-16 (the audio part is identical to SX-17) It worked very well Best 73 Franz (HB9HPZ) Von: [email protected] <[email protected]> Im Auftrag von