[ARC5] TCS Xtals

[WA5CAB at cs.com]

I have several hundred of them (but relatively few in matched pairs and of 
those, relatively few on "useful" frequencies.  But I have never come across 
any mention of how they were stored.  I.e., no evidence of a storage 
container being built for them.

FWIW, first, the TCS doubles and quadruples for Band 2 and Band 3 
respectively.  So if you were to come across a crystal marked 7800 KC transmit, it 
will also work on 3900 and 1950 (the latter being the actual crystal 
frequency).  Second, the holders used are duals, but the same (single) side is used 
for both the receiver and transmitter marked crystals.  So all crystals will 
work in either transmitter or receiver.  The trick is figuring out what 
frequency it will put you on.  An 1800 KC crystal will put you on 1800, 3600 and 
7200 KC transmit.  Or 2255, 3145, 4055, 6745 and 7655 KC receive.  However, 
the standard markings for receive crystals are always with the injection 
signal 455 KC above the operating frequency.  So if you found an 1800 KC 
receive crystal, it would only be marked either 3145 or 6745.  

In a message dated 5/16/2011 10:16:56 PM Central Daylight Time, 
w7qho at aol.com writes: 
> All,
> 
> Bit hesitant here about bringing up "TCS" again following the fuss  
> that developed following the last mention of these radios but let's  
> see what happens. :^)
> 
> Been seeing and owning these (transmitters and receivers) for years,  
> very popular radios, widely available and produced originally in large  
> numbers.  But, very few of the crystals in their large holders which  
> could be optionally used to control the transmitting and receiving  
> frequencies seem to be in evidence.  Have never seen a fully populated  
> set, transmitter or receiver, and rarely any set with any crystals  
> installed at all.  Don't see them at 'fests or on eBay. What's the  
> story here?  Were there sets of crystals produced for these radios,  
> boxed with separate drawers for transmit and receive units like with  
> the BC-669 for example?  Or, was xtal control found to be unnecessary/ 
> undesirable in practice?  Or what?  Anyone know more?
> 
> Dennis D.  W7QHO
> Glendale, CA
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480