[Hallicrafters] Short metal tube mystery

[Charlie T, K3ICH]

(Guess my auto spell check isn't working)  Should be "characteristics".


----- Original Message ----- 
From: "Charlie T, K3ICH" <pincon at erols.com>
To: <hallicrafters at mailman.qth.net>
Sent: Wednesday, October 27, 2010 10:39 PM
Subject: Re: [Hallicrafters] Short metal tube mystery


> If I remember correctly, the squatty little 717A is a sub for a 6SG7, but
> the only ones I've ever seen were glass envelopes, not metal.  I used one 
> in
> my SX-99 RF stage.  Not sure if it really made a difference.   Maybe it's
> AGC charisticts were just different.
>
> 73' Charlie k3ICH
>
>
> ----- Original Message ----- 
> From: <mikeqrpfun at aol.com>
> To: <hallicrafters at mailman.qth.net>
> Sent: Wednesday, October 27, 2010 9:54 PM
> Subject: [Hallicrafters] Short metal tube mystery
>
>
>>
>>
>> Hi folks,
>> My long time ham buddy (W6LPU) and I have been recently sharing SX-28
>> stories and would appreciate some insight from you experts. I recall as a
>> teenager that my SX-28 housed small non-OEM metal tubes in the center
>> shielded RF section. I recall they were electrically equivalent
>> replacements to the ubiquitous 8 pin OEM octal 3" tall metal tubes (like
>> the ones in my BC-348-Q) but these puppies were only about an inch tall
>> with a slight dome on top.
>>
>> They supposedly offered better performance than their taller brethren. My
>> buddy isn't resonating with my recollection thinking instead I was
>> recalling "loctals" that have a very short distance between the pins and
>> the elements so that they could be used in the VHF spectrum. He said his
>> SX42 uses them saying they were pretty much duplicates electric-wise of
>> the 6SXX series except they were labeled 7XXX.
>>
>> Seems this same good old buddy gave me one of his SX-28A receivers a year
>> ago that I am getting ready to restore and would greatly appreciate you
>> fine folks clearing my"brain fog" and forward your recollections of this
>> mystery tube series and perhaps some part numbers that I so vividly
>> recall.
>>
>> 73 and thanks in advance,
>>
>> Mike
>> WB6UTW
>>
>>
>>
>>
>>
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