[R-390] Y501 Rattles

[Roger Ruszkowski]

Craig,

The crystal cans can be unsolder and opened.
You can stuff a 455 KHz crystal inside the can and resolder.

I stuffed a couple cans with some no name surplus crystals and they
run close enough for my counter and signal generator to zero with.
As a CW filter and for dial calibration they are good enough.

Roger.
 
 
-----Original Message-----
From: Craig <hamfish at comcast.net>
To: r-390 <r-390 at mailman.qth.net>
Sent: Tue, Apr 12, 2016 10:18 pm
Subject: [R-390] Y501 Rattles

To the list:

The Motorola R-390/A has a rare disease, rattle of the Y501. This is not
good if the receiver is to be placed in a vibrating location. The 455KC
crystal inside Z501 is broke, plain and simple. I see where Fair Radio has
Z501 with crystal/less cover, but have to wonder about the condition of the
crystal? Last week I spoke with ICM (International Crystal Manufacture) and
thought they had the real thing; upon arrival of their crystal the pins were
too small in diameter and way too long. 

Anyone been down this road?

Thanks,
Craig
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