[Milsurplus] A Cable Question

[J. Forster]

Interesting, and it make potentially cabling up things like an ASB-5 a lot
easier...  possible even!

Thanks,

-John

====================


> The 1945  NAVSHIPS document I mentioned earlier has an interesting
> section on solid-dielectric coaxial cable.
> http://www.hnsa.org/doc/waveguide/pg027.htm
> The old CASSF-50-1 type had a polyisobutylate insulation which had
> several problems (loss, cold flow, low voltage, etc.). To get around
> this the Navy sponsored construction of two new plants to make a new
> material, polyethylene, which was used in all solid dielectric cables
> since the plants came on line in July 1943. The new polyethylene types
> are the RG-x/U series (evidently RG-8 has *always* been 0.405 OD) and
> this 1945 doc says to scrap all the old stuff since loss goes up
> steadily with age.
> The old stuff could be recognized by a white or amber insulation which
> was soft to the touch. Fascinating, Captain
>
> Anyway, sounds like John's found the problem - his connector needs to
> be reamed out.
>
> cheers,
> Nick K4NYW
>
> On Wed, Jul 27, 2011 at 11:01 PM, Jim Whartenby <antqradio at sbcglobal.net>
> wrote:
>> John
>> I just checked TM11-487 dated 2 October 1944 for information on WW2
>> coax.  On
>> page 492 is the data on RG-8 which is still listed as 0.405 inch O.D.
>>
>> Looking further, for the CASSF-50-1 you mentioned I found that it indeed
>> cross
>> references to RG-8/U and is called out in the column headed as "Replaces
>> Old
>> Cable Number".  Other numbers listed as replaced by RG-8/U are:  PT5,
>> WC543,
>> WC549.
>>
>> So I would assume that the jacket is butted up to connector but does not
>> connect
>> to it as is with modern constant impedance connectors.
>> Regards,
>> Jim
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