[Hallicrafters] Replacement Capacitors

[Mark Bell]

and don't forget those resistors across each of 'em !!

Keep us posted !!

73 Mark K3ZX


----- Original Message -----
From: "Bill" <k2wh at optonline.net>
To: "Philip Atchley" <beaconeer at elite.net>; <hallicrafters at mailman.qth.net>
Sent: Sunday, October 12, 2003 11:29 AM
Subject: RE: [Hallicrafters] Replacement Capacitors


> Good point!  I agree.  For some reason it didn't occur to me to
> use more than 2 caps.  (3) is definitely the way to go.  Thanks
> for the advice.
>
> K2WH
>
> -----Original Message-----
> From: hallicrafters-admin at mailman.qth.net
> [mailto:hallicrafters-admin at mailman.qth.net]On Behalf Of Philip Atchley
> Sent: Monday, October 13, 2003 7:10 AM
> To: hallicrafters at mailman.qth.net
> Subject: Re: [Hallicrafters] Replacement Capacitors
>
>
> Hi.
> I think that if the original circuit was rated at 10 uF 1200 Volts then I
> would, AS A MINIMUM use three 33 uF 450 VDC capacitors in series for a
value
> of 11uF at 1350 VDC.  GOOD repair/overhaul practice dictates that all
> replacement capacitors MUST at least equal the originals in value and
> exceeding those values a little doesn't hurt, especially in today's world
> where the line Voltage is HIGHER than the gear was designed for!
>
> 73 from the "Beaconeers Lair".
> Phil, KO6BB
>
> DX begins at the noise floor!
> beaconeer at elite.net
> Merced, Central California
> 37.18N  120.29W  CM97sh
>
> ----- Original Message -----
>
>
>
> > Going from memory here..... cuz I can't find my HT-37 manual,  that 750V
> is
> > steady state.   Is that measured off of a choke ?   I'm wondering about
> > voltage transients -- that may be why the caps were originally rated at
> 600V
> > each.   In that case 900V may not be enough.
> >
> > The equivalent circuit would be 10 uF at 1.2 KV.
> >
> > 900V Seems a bit low.   Maybe someone with the schematic in front of
them
> > can comment.
> >
> > 73 Mark K3ZX
>
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