[Drake] TR4C crystal ID

[William Houghton]

Dick,

For 80m and 20m, the VFO signal bypass the premixer. For 40m, 15m, and 10m, the VFO and the crystal osc hetrodyne in the premixer. 
40m uses a 21.5 mHz xtal, 15m uses a 35.5 Mhz xtal, and the 10m bands use 42.5, 43.0, and 43.6 MHz xtals. I'd have to open mine up (which I can't do right now) to tell their location in the xtal holder. (BTW, this is described in the theory of operation section of the manual if you need it for further reference).

Bill




________________________________
From: Dick KF4NS <kf4nsradio at verizon.net>
To: DrakeRadio list <DrakeRadio at yahoogroups.com>; Drake list at zerobeat <drakelist at zerobeat.net>; drake at mailman.qth.net
Sent: Tue, June 15, 2010 3:15:14 PM
Subject: [Drake] TR4C crystal ID

I was not able to find a xtal xref chart in Garey's CD, nor in the 
other information I have. Which xtals are for which bands (schematic 
is confusing), it looks like 80M and 20M have no xtal.

What is the one next to the PTO? Wish I had a chassis top view parts 
ID to refer to.

While I have your attention, I have read opposing views on the 
orientation of an added PA fan. I usually direct the air 'IN' to the 
compartment if the fan is strictly for the PA tubes. There is no room 
for a fan on top due to my desk shelving so I always attach the fan to 
the back.

73, Dick KF4NS
St Petersburg, FL 33714 USA
Keep The Glow! 

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