[ARC5] TCS Xtals

[mac]

The BC-411 used the same holder which mounted two crystals, the  
transmit/receive  pair for a given channel.  The Coast Guard T-100  
transmitter also used the same holder (single crystal).
Have only run across one -411 unit in my travels (don't remember the  
channel freq.).

Dennis D.  W7QHO
Glendale, CA

*****************
On May 17, 2011, at 12:00 AM, WA5CAB at cs.com wrote:

> Henry,
>
> Your unit being open at the top means that someone removed the top  
> cover
> and didn't replace it.  They are not normally open like that.  And the
> majority do not have any pressure adjust screw.    I may have seen  
> one like that,
> out of hundreds.
>
> The holder is functionally equivalent to the Signal Corps FT-249.   
> The most
> common Navy Type Number appears to be NT-40130 (based on how many of  
> each I
> have).  Made by numerous contractors.
>
> In a message dated 5/17/2011 1:48:38 AM Central Daylight Time,
> meils at get2net.dk writes:
>> That makes a lot of sense - now I know why there are 3 prongs on  
>> the TCS
>> xtals.
>> Found the one I mentioned before:
>>
>>
>>          QUARTZ CRYSTAL
>> CRYSTAL FREQ    SERIAL NO.
>> 1727.5 KC                   RW-14729
>>    AXIS       TYPE      oC
>>        A         I - G        25
>> EQUIP MODEL       OUTPUT FREQ
>>       TCS                     3000 KC
>> COLLINS RADIO COMPANY
>>
>> The "Equip Model" labelling, here stamped "TCS," -- could possibly  
>> imply
>> that these type
>> xtals were also used in other gear and there might be some  
>> container box
>> for
>> them,
>> not necessarily specific to the
>> TCS.
>>
>> My xtal is exposed, open at the top -- can see there's an adjustable
>> pressure screw.
>> I will see if I can get it to oscillate.
>>
>> (Here, [(1727.5 x 2) - 455(IF)] KC , yielding  a 3000 KC receiver
>> frequency).
>>
>> Henry, Cph.
>> oz3o n2nr
>
> Robert & Susan Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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