[Boatanchors] Recapping SX-100

[Carl]

With Halli it was always "follow the money"

Carl
KM1H

----- Original Message ----- 
From: "Garey Barrell" <k4oah at mindspring.com>
To: "Boatanchorslist" <boatanchors at mailman.qth.net>
Sent: Friday, March 13, 2009 10:23 AM
Subject: Re: [Boatanchors] Recapping SX-100


> 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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