[R-390] HOW to .....?

Bob kb8tq kb8tq at n1k.org
Sat Mar 10 08:31:28 EST 2018


Hi

I found some cans with octal bases on them. Dropped the caps into the cans.
Everything fit fine. I put the old caps in a box for a “future project”. In 15 years, 
I’ve never gotten back to that project.

Bob

> On Mar 9, 2018, at 10:09 PM, Fernando <n2fq at sbcglobal.net> wrote:
> 
> I just did a set and agree, the pins on mine are steel and
> 
> the leads from the capacitor foils are crimped on. Not enough
> 
> material to make threads on what was left over. Used so much
> 
> heat on the pins that the bakelite was sizzling.
> 
> Had to order octal plugs and used capacitors with axial leads.
> 
> If I were to do it again, I would cut up from the seam up a tad
> 
> in the hope the foil leads stay in tack and work with that. 
> 
> Or as suggested, wire them from the bottom, not on the
> 
> same pins as the old caps.
> 
> 
> Just a beginners experience for what its worth.
> 
> 
> Still looking for RF and AF gain controls though.
> 
> 
> Fernando N2FQ/6
> n2fq at sbcglobal.net
> 
> 
> 
> 
>> On Mar 9, 2018, at 6:22 PM, jbrannig <jbrannig at verizon.net> wrote:
>> 
>> The R-390A cap was a bit more complicated.
>> The base pins are aluminum and can't be soldered.I drilled and tapped the pins to accept brass screws and soldered the capacitor leads to the screwsI don't remember where I saw this.
>> A pipe cutter opened the cans and Epoxy closed 
>> If there is room under the chassis, just solder the caps to the bottom of the sockets.It is a lot easier
>> Jim
>> Sent from my Galaxy Tab® A
>> -------- Original message --------From: Al Parker <anchor at ec.rr.com> Date: 3/9/18  8:45 PM  (GMT-05:00) To: jupete at internode.on.net, r-390 at mailman.qth.net Subject: Re: [R-390] HOW to .....? 
>> Hi Pete,
>> 	Ihave some info and pix on how I've done it for several different caps 
>> on one of my webpages.  Don't picture the R-390A ones there I don't 
>> think, but I've done them similarly.
>> <http://www.boatanchors.org/filtercap.htm>
>> 73,
>> Al, W8UT
>> 
>> On 3/9/2018 8:34 PM, Pete Williams wrote:
>>>   G'day    list....  There is a reference  somewhere as to method
>>> /details of  opening  and  restuffing the  electrolytics in  the
>>> R-390A  power  supply.
>>> Would  someone give  me  the reference  for  this  activity please?
>>> Tks
>>> Pete  VK3IZ
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