[Collins] S -line Crystals ?

[Dr. Gerald N. Johnson]

On Tue, 2008-03-11 at 17:09 +0000, Bjarni Magnússon wrote:
>  
> Hello all.
> 
>  
> 
> I am fixing up a 75S-1 and a 32S-1 for a friend.
> 
> When I lifted the lids I noticed that ALL the xtals in both
> 
> units where missing.
> 
>  
> 
> Does any know where I could get the proper xtals
> 
> for the ham bands?
> 
>  
> 
> Thanks.
> 
>  
> 
> Bjarni Magnusson  TF3BM.
> 
>  
Surplus Sales of Nebraska has had them. But their list I just checked
has no ham band crystals below 29 MHz.

International Crystals of Oklahoma City, Oklahoma can make them for a
price.

Burghardt Amateur Center at Watertown, South Dakota has some. Here's
their current list:


> 1   	COLLINS 11505.0 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 11516.5 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 11555.0 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 11655.0 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 12202.5 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 12693.05 KHZ	XTAL                            	Rg    	5.00
>    1   	COLLINS 13016.67 KHZ	XTAL                            	Rg    	5.00
>    1   	COLLINS 13334.5 KHZ 	XTAL                            	Rg    	5.00
>    2   	COLLINS 15027.5 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 15227.5 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 15250.0 KHZ 	XTAL                            	Rg    	5.00
>    2   	COLLINS 15327.5 KHZ 	XTAL                            	Rg    	5.00
>    2   	COLLINS 16027.5 KHZ 	XTAL                            	Rg    	5.00
>    6   	COLLINS 16277.5 KHZ 	XTAL                            	Rg    	5.00
>    4   	COLLINS 7155.0 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 7450.0 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 7475.09 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 7538.75 KHZ 	XTAL                            	Rg    	5.00
>    1   	COLLINS 7544.444 KHZ	XTAL                            	Rg    	5.00
>    1   	COLLINS 7750.0 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 7877.5 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 7977.5 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 8077.5 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 8277.5 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 9500.0 KHZ  	XTAL                            	Rg    	5.00
>    1   	COLLINS 9977.5 KHZ  	XTAL                            	Rg    	5.00
> 
For the lower bands (below 14 MHz) the crystal frequency is 3.155 MHz above the lower band edge.
For the upper bands the crystal frequency is half that. So none of these is a useful ham band
frequency.

There isn't much exotic about the crystal except for the frequency. Fundamental, HC-6U case, parallel
probably 20 pf parallel C.

If you run transceive you use only the receiver crystals and need none in the transmitter. That
limits DX chasing splits to within the 200 KHz.


-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer