[MRCG] SCR-522 xtals

[Chuck McClurg]

Group:

Well after going through 267 crystals and calculating every which way (Thank 
God for Excell!) I find I have ONE transmit crystal for 144.45 Mcs but no 
receriver crystal.....:-(

By the way the Receiver crystal mulitplier is 16 for the 2mtr band for a 
'522  (Fxtal  = freq -12 devided by 16 = 8278.13)

Could you please look in your crystal boxes and see if anyone has a 
8278.13Kcs one in a CR-1A holder???

If this does not work out maybe I will open one that is close and do the 
toothpaste trick and see how close I can come ! ! !

Thanks,

Chuck
N7UVZ


----- Original Message ----- 
From: "Dennis DuVall" <scr522 at earthlink.net>
To: "West Coast Military Radio Collectors Group" <mrcg at mailman.qth.net>
Sent: Friday, January 17, 2014 11:56 AM
Subject: [MRCG] SCR-522 xtals


> The way the SCR-522 is set up the transmitter operates off the 18 
> harmonic of the controlling crystal.  Thus, for an output frequency of 
> 144.450 mHz an 8025 crystal would be required.  On the receiver side a 
> number of different harmonic combinations are possible to provide an 
> injection harmonic 12 mHz (receiver IF freq.)  below the desired 
> operating frequency.
>
> 2M Freq         Xmit xtal 
> Rec xtals
> -----------          ------------                                          
>      -------------
> 144.265     8014.72                    8817.67           8266.56 
> 7780.294     7348.06
> 144.4          8022.22 kc               8826.67           8275 
> 7788.235     7355.56
> 144.45        8025                         8830                 8278.13 
> 7791.176     7358.33
>
>
> Dennis D.  W7QHO
> Glendale, CA
>