[Boatanchors] replacing oil filled capacitor in Viking II ?

Sun Dec 13 16:26:47 EST 2020

Just to clarify, since it is apparent I need all the help I can get.. HI.
Its a can (Sprague) oil filled capacitor and its  8 mfd / 1000 volts, not 100
volts (what at originally said in error). I believe that is the correct
nomenclature.. " a can ".
Cap sort of looks like corned beef/SPAM can, like a bath tub. 
Brian VE3VAW

> ---------- Original Message ----------
> From: Richard Knoppow <1oldlens1 at ix.netcom.com>
> Date: December 13, 2020 at 3:52 PM
> 
> 
>     If this is a 1KV cap its almost certainly a paper cap. I 
> don't think electrolytics were ever oil filled. The oil is 
> probably a PCB, I don't think a big hazard but try to keep from 
> being exposed to it much.
>     I have no idea of what sort of HV caps are available now but 
> a search at one of the large suppliers should find out. Oil 
> filled paper caps came in round cans, like electrolytics, and the 
> familiar square cans. If you can replace it with a modern plastic 
> cap or a couple in series, they will last forever.
>     While oil filled caps were much longer lasting than the usual 
> wax filled paper they still have a limited life and should be 
> replaced.
> 
> On 12/13/2020 12:13 PM, howard holden wrote:
> > Hello Brian,
> >
> > No experience with the Viking II, but I have a regulated 350VDC supply that
> > I use in a GO-9. That supply had an oil filled cap in the HV side which
> > leaked. Replaced it with an equivalent value electrolytic, no issues and
> > it’s been playing for about 5 years now, very often and sometimes for days
> > at a time. I’d say go for it, just be careful with the oil filled in case it
> > is PCBs.  And no problem using the Viking II on CW – it’s my only mode!
> >
> > 73, Howie WB2AWQ Reno NV
> >
> > Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows
> > 10
> >
> > From: brianpepperdine brianpepperdine<mailto:brianpepperdine at sympatico.ca>
> > Sent: Sunday, December 13, 2020 12:00 PM
> > To: Boatanchor group<mailto:boatanchors at mailman.qth.net>
> > Subject: [Boatanchors] replacing oil filled capacitor in Viking II ?
> >
> > Hi.
> > I recently picked up a Johnson Viking II. Owner is SK.
> > Looking inside it is pretty good top and bottom of chassis. No charred
> > marking
> > etc FWIW.
> >
> > The only thing of consequence at first view is the oil filled capacitor.. 8
> > Mfd
> > 100 vdc. This does show a little of what I think is seepage around the two
> > terminals and bit around the seal of the can at the top. Not migrated
> > anywhere
> > else, not onto the chassis below nor down the can. Just a thin brown line.
> >
> > Most of what I can see on the internet re. cap replacement in the Viking II
> > is
> > re. the paper caps and electrolytics, which is straight-forward, but they
> > say
> > the oil filled is generally OK and are left alone (no one seems to mention
> > possibility of PCB?). Anyhow, if the oil filled cap should go as a caution
> > re.
> > what is seems visibly (I have not tested it re. capacitance nor resistance)
> >   what can I replace it with that is modern at 8 mfd and 1000 VDC? I see no
> > reference to that generally re. the Viking II nor electronics in general?
> > Any ideas how to proceed or advisability etc
> > Hope to get this on the air by early 2021 if I can.. just need to order the
> > right stuff for it. Otherwise looks good and hope transformers etc. fall
> > into
> > place A-OK of course etc. As do we all with our BAs coming in!! Sacrilege of
> > sacrileges I will only use it on CW, not AM phone...
> >
> > 73
> > Brian VE3VAW
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> -- 
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
> 
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