[R-390] Where is the xtal Y201 located?

[David Wise]

"Read the whole thread first" is a rule I keep breaking, sorry.
Mitigating circumstance: Jim changed the subject line.

Jim, your search is doomed; there is no Y201 in the R-390.
The first and second crystal oscillators in the R-390 both
use multiple crystals.  They're all on the crystal deck
and numbered Y4xx.  Then there's the calibrator crystal,
Y901, in its own oven on the calibrator deck,
and the IF deck has its 455kHz crystal.  That's it.

In TM11-5820-357-35.pdf, the schematic is page 150.

Dave Wise

> -----Original Message-----
> From: Roy Morgan [mailto:roy.morgan at nist.gov]
> Sent: Monday, September 24, 2007 1:11 PM
> 
> At 03:55 PM 9/24/2007, David Wise wrote:
> >Download a copy of the Y2K R-390A manual; it's figure 6-11,
> >and you could have searched for it by name.  After my brain,
> >this manual is my first service tool.
> 
> 
> Ahem,
> 
> Jim Green posted recently that he is working on an R-390/URR, 
> The fabled 
> "non-A":