[Boatanchors] Polyester Capacitors in Johnson Ranger?

[Carl]

The Sangamo 33 came out around 1954 (its in the 1955 Masters but not the 
1953) and was a replacement for the infamous earlier type 30 "Redskin". 
The 33 was indeed a turquoise or similar color, certainly not green.

I'll refrain from commenting on HBX as I dont need any ATF loonies 
knocking down my doors. I'll stick to FFg for now.

Carl
KM1H


----- Original Message ----- 
From: <WA5CAB at cs.com>
To: <mharmon at att.net>; <boatanchors at mailman.qth.net>
Sent: Saturday, October 11, 2008 1:52 AM
Subject: Re: [Boatanchors] Polyester Capacitors in Johnson Ranger?


> Mike,
>
> You may have run into disinformation, which unfortunately is the 
> Internet's
> primary product.  According to the Sangamo catalog sections in the 
> 1960 and
> 1963 Radio Master, the Type 33 is a molded paper dielectric capacitor. 
> The color
> is not mentioned, but memory says green.  The 1963 catalog lists a 
> Type 33M,
> with mylar dielectric (mylar is a polyester), but it isn't in the 
> 1960.  The
> molded case material is not actually given.  Sangamo called it 
> "Humiditite".
>
> The Sprague Black Beauties also used Mylar plus paper.  But the 
> catalog entry
> also says they were impregnated with HCX.  Maybe that was their 
> downfall.
> Had to read it twice to make sure it didn't say HBX, but fortunately 
> only cannon
> cockers and Minemen would know what that is.
>
> In a message dated 10/11/2008 12:04:05 AM Central Daylight Time,
> mharmon at att.net writes:
>> Anyway, I was inventorying the caps with the intent to replace them, 
>> and
>> I noticed a number of turquoise axial lead caps which were marked
>> Sangamo Type 33.  I did some research and found that these are 
>> polyester
>> caps.  The solder jobs look professional, but I thought polyester 
>> caps
>> came along well after the late Fifties when the Ranger was built 
>> (yes,
>> it was a factory job - all rivets).  In the early Sixties I was a 
>> high
>> school kid with a terminal case of screwdriver-itis.  The TV 
>> repairman
>> used to bring old chassis by the house and unload them for me to
>> cannibalize, much to the chagrin of my mom!  The only kind of caps I
>> remember seeing back then were molded micas, disk ceramics, nasty,
>> dripping wax-paper caps, and a lot of black beauties, which were a
>> sealed wax paper, foil, and oil abomination.
>>
>> Could these caps be OEM?  Were polyester caps available back in the 
>> late
>> Fifties?  If so, they couldn't have been cheap.  If Johnson engineers
>> put them in their transmitters at the factory, the company must have
>> believed that they were worth the extra cost.
>>
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
>
>
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