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1) So, in a Lionel the primary "flyback" voltage should be about 15.5V peak. Then after a diode drop and limited by the loading of the one-shot pulse detector on the -15V line. This -15V is regulated

https://texascooppower.com/all-that-glitters-is-sometimes-yttrium/ I live not to far from Lake Buchanan in Central Texas where Barringer Hill lies inundated since 1937. Cool story to read, quite a

peter <epkoncept@...> added folder */Components/Zeners*

Yes I have measured totally unregulated rectified , and no that's not it. 1350 is where I pre regulate the made-from-CDV-700-transformer bias supplies for use in and with shop made testing equipment.

Geo, 1) have you ever measured an unregulated HV output , after rectification but without Shunt Regulator loading, of a Vic/Lionel/ENi with a 1G meter? ?Is that the 1300V figure you used earlier? 2)

That tracks with bench measurements gentlemen, I'm seeing full rated V at 1000 M Ohms load and 1 kV DC, but not at 10,000 M Ohms. Now on to the next measurement which requires an electrostatic

Peter, how about starting a Zener folder in FILES so we can find this again, and add to it. Geo To: "CDV700CLUB" <[email protected]> Sent: Thursday, April 7, 2022 2:25:08 PM Subject: Re:

Ah! Excellent! Down to 1uA with 10uA being comfortably on the curve, and that is a 1/2Watt Zener which is the most common kind I see. I notice the Zener (or Avalanche) voltage increases linearly up to

Roger et al: figure 1 in the attached Rohm spec sheet show? current vs voltage for their various zeners.

The winding ratio is the square root of the ratio of the inductances, so the secondary (measured with the two primary's open circuit) is probably in the several Henry region....... I did come up with

" Have you ever seen a spec on the windings ratio(s) of the HV transformer for Vic/Lionel/Eni? (OR the inductances, from which the ratios can be calculated?) I tried (over 2yr ago) to measure the

1) Yes, I think so, but 10uA makes me much more comfortable. At 1uA I would expect it is low in the knee. At 10uA I would suspect it is high in the knee. That is all I know about that: suspicions

" I worked as an X-ray repair tech at my last job. Medical and Veterinary X-ray at first, then the Medical side split off. Mostly field portable stuff. We had a really cool X-ray dosimeter tool that

" I have been bogged down by my excesses. I have a large collection of parts from HP and Ericsson surplus and have hit the point where I have so many parts I can't find what I need and it is easier to

Let's skip that for now. Will a single series Zener, say 100V, operate if the supply is limited to 1 uA by the load resistance? Is there a spec for that? We were talking about the LM431 the other day

To: "CDV700CLUB" <[email protected]> Sent: Thursday, April 7, 2022 12:02:38 PM Subject: Re: [CDV700CLUB] Question and an interesting site for those that modify CDV700s and more. Geo, With UnRegHV =

Clay, Regarding the "stupidly overwhelmed' comment, "I resemble that remark!" Thank you for your kind appreciation. Peter's latest circuit, posted today, looks very good to me, a balance of

A bit off my original topic here.? I have a large area diode detector in the collection, nothing to hook it to.? They are commercially available.? I haven't gotten around to doing anything with it

I guess if I had finished reading your note, you already said that! Sorry! rogerw

looks very good. Q2 may easily need to be HV though. rogerw -- This email has been checked for viruses by AVG. https://www.avg.com