[Boatanchors] replacing oil filled capacitor in Viking II ?

Sun Dec 13 17:09:23 EST 2020

    If its actually leaking it should be replaced. If not leaking 
it is probably OK. Part of the trouble with PCBs is that Monsanto 
and General Electric dumped tons of it into the Hudson river and 
refused to help clean it up. It is a carcinogen and long exposure 
can cause cancer. Exposure to a small amount is not going to hurt 
you. You can look the stuff up for detailed, authentic information.

On 12/13/2020 1:26 PM, brianpepperdine brianpepperdine wrote:
> 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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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL