Thanks Dick, I can try that. As constructed the bolts are running thru
the same piece of angle aluminum that mounts the transformer to the chassis.
As for cap bank I am using six 2watt 220k metal film Rs across each cap for
equalizing, no bleeder at all. Not worried about a fast bleed-off of the
caps. I just tried the 100k across the cap bank briefly to see if there was
a short in the secondary that might only show up under a little load & to
see how much voltage drop it would give.
73 Dave
----- Original Message -----
From: "Dick Hanson" <dick@dkhanson.com>
To: "'David H Craig'" <n3db@radix.net>
Sent: Saturday, May 03, 2008 8:38 PM
Subject: RE: [Amps] HV transformer issue
> Hi Dave....
> I think Gerald is onto something here.
> When I bought a large (3KVA) toroid hv trans from Hammond some years back,
> they were very careful to point out that the bolt to hold the core to the
> chassis needed to be insulated from the chassis. I can't give you all the
> tech logic behind this, but the insulated bolt never got hot.
>
> BTW, do you have voltage equalizing resistors across those caps, or, are
> you
> just using the single 100K bleeder?
> 73
> Dick, K5AND
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of David H Craig
> Sent: Saturday, May 03, 2008 7:31 PM
> To: TexasRF@aol.com; amps@contesting.com; km1h@jeremy.mv.com
> Subject: Re: [Amps] HV transformer issue
>
> I assumed not since it was built as it is, but that said a dead SB220 HV
> transformer I pulled apart did indeed have insulated bolts. Should I try
> doing so, maybe with a teflon tube as opposed to paper?
>
> 73 Dave
>
>
> ----- Original Message -----
> From: <TexasRF@aol.com>
> To: <n3db@radix.net>; <amps@contesting.com>; <km1h@jeremy.mv.com>
> Sent: Saturday, May 03, 2008 8:24 PM
> Subject: Re: [Amps] HV transformer issue
>
>
>>
>> Are these through bolts supposed to be insulated?
>>
>> 73/gw
>
>
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