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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

Don, The primary is definitely open so yes, it has been declared garbage but that may indeed be worth exploring. Thanks.

Jim, Thanks for the detail. Taught me something about looking at the datasheets! Looks like there is an A-4723 available on eBay in the USA. However, someone elsewhere also pointed out this product

DonThe fusing current for 18 AWG wire is 83 amps.? This is the point where the copper wire is hot enough to melt.? I found this info

Jim yes mostly I guess you are responding to Same sort of goes for radios of old. I blame the NEC++ for allowing a 0.35 amp radio to be *protected* by the 15 amp house fuse Quibbling …. “to the

Rick they have oodles of SRS. which exact one ? maybe a link so we can see what you recommend … don Sent: Friday, July 12, 2024 12:11 PM To: [email protected] Subject: Re:

You have a pretty good point Jim, It appears that this could be a pretty simple solution to a problem,? but only if it is actually "the problem" but I'm not seeing where "soft" start solves it. An

DonWhatever is used as a circuit protection device, it is there to protect the hidden wiring from the distribution panel where the fuse or circuit breaker is located to the outlet, it is not used to

First, sorry for the email that flew of my bit machine, I went on line and deleted it. Ed I guess we are OT a fair bit, but you and Jim raised stuff related to “turn-on” situations. As I recall in

Your last paragraph brings to mind all the issues we encountered at the railroad when we began to try to improve on the original systems in our older equipment. We were doing in house overhauls and

I am not sure what the problem is that is causing this need to limit this mysterious charging current.? What is causing it and why didn't the original designers notice it back then and come up with a

Hi Don, I've used a soft start module for a heavy duty power supply but not for my HT37 which is one of my retirement projects. I've bought these modules off ebay but they are designed for 220VAC to

Lou, how much$. you have some in operation? Sent: Tuesday, July 9, 2024 4:44 PM To: [email protected] Subject: Re: [HallicraftersRadios] HT-37 transformer failure due to rapid