[MRCG] SCR-522 XTALS and other XTALS Questions

[Dan Dolan]

SCR522 - was a WWII IFF set that transmitted on the 100-156 MHZ VHF band.
The xtal oscillator doubles a bunch of times to get there!
K4RN

-----Original Message-----
From: mrcg-bounces at mailman.qth.net [mailto:mrcg-bounces at mailman.qth.net] On
Behalf Of willi6 at starpower.net
Sent: Monday, March 03, 2014 4:52 PM
To: mrcg at mailman.qth.net
Subject: Re: [MRCG] SCR-522 XTALS and other XTLA Questions


I recently came across a BX-40 Crystal Box with most of the crystals.  It
starts at Channel 270 (5675 KCS) and goes to Channel 389 (8650 KCS).  It is
missing four (4 ) c rystals , some of which which I believe were the typical
useful 40-Meter rocks.  The missing channels are 330 (7175),  325 (7050),
324 (7025), and 322 (6975), 

Any idea what radio type this "Rock Collection" was typically associated
with? 

73,  Dave 

Dave Williams - K7HMP/4 
Stafford, Virginia 


----- Original Message -----

From: mrcg-request at mailman.qth.net 
To: mrcg at mailman.qth.net 
Sent: Monday, January 20, 2014 12:00:15 PM 
Subject: MRCG Digest, Vol 20, Issue 14 

Today's Topics: 

   1. Re: SCR-522 xtals (Chuck McClurg) 
   2. Re: SCR-522 xtals (boatanchor at martasystems.com) 
   3. Re: SCR-522 xtals (mac) 
   4. Re: SCR-522 xtals (boatanchor at martasystems.com) 


---------------------------------------------------------------------- 

Message: 1 
Date: Sun, 19 Jan 2014 09:17:47 -0800 
From: "Chuck McClurg" <j-mcclurg at sbcglobal.net> 
To: "West Coast Military Radio Collectors Group" 
        <mrcg at mailman.qth.net> 
Subject: Re: [MRCG] SCR-522 xtals 
Message-ID: <9B19EF8DEDB14F0DB489B451D15587AF at commodesktop> 
Content-Type: text/plain; format=flowed; charset="iso-8859-1"; 
        reply-type=response 

Well after looking for a Receive crystal with no luck I am open to the best 
method to "grind" one of the ones I have up to the correct frequency. 

What is the best way to go with trying this?  I have trolled the internet 
and found a couple of ideas but wanted to ask if anyone has tried any of 
them with any 
sucess. 

Any ideas welcome............................. 

Chuck 
N7UVZ 



----- Original Message ----- 
From: "Chuck McClurg" <j-mcclurg at sbcglobal.net> 
To: "West Coast Military Radio Collectors Group" <mrcg at mailman.qth.net> 
Sent: Friday, January 17, 2014 2:55 PM 
Subject: Re: [MRCG] SCR-522 xtals 


> 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.....:-( 
> 



------------------------------ 

Message: 2 
Date: Sun, 19 Jan 2014 19:04:23 -0000 
From: <boatanchor at martasystems.com> 
To: "West Coast Military Radio Collectors Group" 
        <mrcg at mailman.qth.net> 
Subject: Re: [MRCG] SCR-522 xtals 
Message-ID: <D728BCB0855D4C23887DEE6D6F77E9F1 at ICEWARP> 
Content-Type: text/plain; format=flowed; charset="iso-8859-1"; 
        reply-type=response 

Hi Chuck - 

When you get a chance, could you measure the B+ on your RA-62 with no load ?

After getting mine working (recapped, replaced bad bleeder, etc) my no-load 
voltage is +465 volts with the power switch in the 125 position. The bias is

spot on at -150, and the filaments seem ok at +14. For comparison, my 
dynamotor no-load B+ is 300 v, about what it's supposed to be...   hmmm. 

Thanks 
John WB6AZP 


-----Original Message----- 
From: Chuck McClurg 
Sent: Sunday, January 19, 2014 17:17 
To: West Coast Military Radio Collectors Group 
Subject: Re: [MRCG] SCR-522 xtals 

Well after looking for a Receive crystal with no luck I am open to the best 
method to "grind" one of the ones I have up to the correct frequency. 

What is the best way to go with trying this?  I have trolled the internet 
and found a couple of ideas but wanted to ask if anyone has tried any of 
them with any 
sucess. 

Any ideas welcome............................. 

Chuck 
N7UVZ 



----- Original Message ----- 
From: "Chuck McClurg" <j-mcclurg at sbcglobal.net> 
To: "West Coast Military Radio Collectors Group" <mrcg at mailman.qth.net> 
Sent: Friday, January 17, 2014 2:55 PM 
Subject: Re: [MRCG] SCR-522 xtals 


> 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.....:-( 
> 

______________________________________________________________ 



End of MRCG Digest, Vol 20, Issue 14 
************************************ 

______________________________________________________________
MRCG mailing list
Home: http://mailman.qth.net/mailman/listinfo/mrcg
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:MRCG at mailman.qth.net

Website: http://www.mrcgwest.org

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html