[Johnson] Need Valiant HV transformer
David C. Hallam
dhallam at knology.net
Thu Jun 12 07:23:03 EDT 2014
Go to
http://members.tripod.com/tubes_tubes_tubes/transformerrewindingservice/. I
have never personally had any experience with Gary's work but all
reports on several reflectors have been very favorable.
David
KW4DH
On 6/12/2014 2:15 AM, w7fe wrote:
> Ideally, I'd like to find a good plate transformer for my Johnson Valiant , but anything that will fit and that I can use to make 800V. at about 600 mA. would be OK.
>
> Here's the story:
>
> A .01 uF, 1.5 KV-rated bypass cap at the HV connection to a small old-style molded RF choke which is in series with the main HV plate supply RF choke suddenly shorted, thus gounding the high voltage thru the choke. With a snap and a buzz, the little RF choke gave its all and dramatically caught fire. It blackened the bottom of the tall plate choke a bit, but did no electrical damage. However, before I got to the HV switch, the HV power supply transformer's primary shorted which then blew the 8A line fuse.
>
> What a reVOLTin' development this is.
>
> 73
>
> Stu, W7FE
> Henderson, NV
>
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