[Boatanchors] [Fwd: Re: Recapping SX-100]

[Don Buska]

Hi Garey,

It has to be a time frame and model cost thing.  My SX-115 has no, and 
never had, Black Beauty caps.  It's mainly ceramic disks and dipped 
silver micas.  There are some larger axial caps and I forget who 
manufactured them, but they weren't Black Beauty in style.  I've not had 
to replace any caps in this receiver yet.  Also, I did work on an 
FPM-200 and it too was similar to the SX-115.  So Halli did have their 
good models.

The no costs bared FPM-200 used PTO's and any trimmer caps were very 
high quality.  So if you were willing to pay $2500.00 for a transceiver 
in 1963 you got quality components, hi.

73

Don N9OO

Garey Barrell wrote:
> Thanks for all the replies....
> I wonder...   Hallicrafter's was the "Mad Man Muntz" of communications 
> receivers when it came to parts quality.  They had terrific designs, 
> implemented with consumer radio parts.  Compare the variable cap in the 
> SX-100 with the one in the HQ-140 or the NC-300 for one good example.
>
> That said, I wonder why Hallicrafter's used "Black Beauty" paper caps 
> for  _everything_  when disc ceramics were available, at least in the 
> values under 0.01uF, and were cheaper?  Possibly just volume 
> discounts?   Minimizing number of different parts to stock/purchase?
>
> 73, Garey - K4OAH
> Glen Allen, VA
>
> Carl wrote:
>   
>> I refuse to use OJ's for the same reason. They look so garish and 
>> offer absolutely no benefit over discs. When I need a film cap I buy 
>> from one of the many overstock dealers on Ebay and go for the green or 
>> brown ones.
>>
>> All caps can cause audio distortion but in a basic single ended amp I 
>> use disc which is exactly what the manufacturers used in the 60's once 
>> 400-600V, high value discs came down in price.
>>
>> I use mylar in PP amps but using HP equipment I havent been able to 
>> see any difference in distortion.
>>
>> Carl
>> KM1H
>>
>>
>>
>> ----- Original Message ----- From: "Garey Barrell" <k4oah at mindspring.com>
>> To: "Boatanchorslist" <boatanchors at mailman.qth.net>
>> Sent: Thursday, March 12, 2009 5:29 PM
>> Subject: [Boatanchors] Recapping SX-100
>>
>>
>>     
>>> Oops!   I'm referring ONLY to bypass caps, obviously caps used for 
>>> resonating filters or in timing
>>> functions need to be mylar, etc.  Some say audio coupling as well, 
>>> but...
>>>
>>> I believe this has been discussed before, but I can't find anything in
>>> the archives.
>>>
>>> Is there any reason to NOT use disc ceramic caps to replace paper caps
>>> in a receiver?
>>>
>>> Also, are there any sources of paper/mylar caps other than the radial
>>> Orange Drops or the brilliant yellow axials?   Neither "look" right, and
>>> the radial leads are almost always a problem in a chassis laid out for
>>> axials....
>>>
>>> -- 
>>> 73, Garey - K4OAH
>>> Glen Allen, VA
>>>
>>>
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>>     
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