Electrolytic capacitors for HO-10/SB-610

[Gerald C. Lemay]

I know keeping junker or parts units has a lot of merit. Those of us who
are not old timers will have to be creative when it comes to finding
alternate sources of high voltage capacitors. A quick look at the Mouser
catalog shows a few components which might be of use, provided they fit.
For example on page 358 are polyester film capacitors rated up to 1kv. You
could use a couple of those in series. Page 364 shows the famous Orange
Drop capacitor line with some rated up to 1.6kv. You won't find the exact
value needed but you can either series or parallel capacitors of the same
value and get what you need. If you can fit them in the space available in
the scope, you will no doubt get better long lasting results than those
black beauty capacitors used by Heath and a host of others. It seems that
I've seen a number of the old HO and SB series scopes with HV capacitor
problems as well as open power transformers probably due to the caps
shorting to ground.

> Larry,
>
> When I had to replace one of those capacitors in my own SB-610 (per
> posting of about a month ago) I was faced with the same dilema...!
>
> My "junque boxxe"---as ample as it is---did NOT yield anything very
> close to what I needed. Lucky for me, I had a DOA junker RCA training
> course 'scope from that same era on hand, & I managed to find a suitable
> replacement from within its bowels.
>
> The transplant was a resounding success, BTW, & speaks volumes on the
> advantages of retaining such "junkers" just-in-case...
>
> ~73~ Eddy VE3CUI - VE3XZ
>
>
>
>
>
>> If necessary,you can always use smaller voltage rating caps in
>> series.For example,two one mfd caps wired in series equal a single one
>> half mfd. cap. If the working voltages were 630 volts per
>> capacitor,then,with the above series combination we would now have a
>> .5 mfd  at 1260 volts equivelent capacitor.
>> Excuse me,please,  if you already thought of this.This also presumes
>> enough physical room to mount capacitors in series is available,of
>> course. Malcolm Leonard
>> ----- Original Message -----
>> From: "Larry Knapp" <kc8jx at YAHOO.COM>
>> To: <HEATH at LISTSERV.TEMPE.GOV>
>> Sent: Tuesday, January 07, 2003 12:09 PM
>> Subject: Electrolytic capacitors for HO-10/SB-610
>>
>>
>>> I'm sure this has been asked many times....but, I would like a source
>>> to
>> buy
>>> several electrolytics for my HO-10's and SB-610 monitor scope.  I'm
>> looking for
>>> the .1ufd @1200V and .15ufd @1600V.  Any leads would be deeply
>> appreciated.
>>> Thanks in advance............73, Larry KC8JX
>>>
>>> =====
>>> May your days be full of sunshine and good thoughts fill your head.
>>> From: Larry Knapp, KC8JX, St. Joseph, Mi  49085
>>>   Best 73's
>>>
>>> __________________________________________________
>>> Do you Yahoo!?
>>> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
>>> http://mailplus.yahoo.com
>>>
>>> -----------------------------------------------------------
>>> This list is a public service of the City of Tempe, Arizona
>>> -----------------------------------------------------------
>>>
>>> Subscription control -
>>> http://www.tempe.gov/lists/control.asp?list=HEATH To post -
>>> HEATH at LISTSERV.TEMPE.GOV
>>> Archives - http://interactive.tempe.gov/archives/HEATH.html
>>>
>>
>> -----------------------------------------------------------
>> This list is a public service of the City of Tempe, Arizona
>> -----------------------------------------------------------
>>
>> Subscription control -
>> http://www.tempe.gov/lists/control.asp?list=HEATH To post -
>> HEATH at LISTSERV.TEMPE.GOV
>> Archives - http://interactive.tempe.gov/archives/HEATH.html
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
> To post - HEATH at LISTSERV.TEMPE.GOV
> Archives - http://interactive.tempe.gov/archives/HEATH.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html