Gary,
Thanks for the feedback. The ".999 kHz" spec is so bizarre it seems like it
was done as an internal joke!
Paul, W9AC
----- Original Message -----
From: "Garey Barrell" <[email protected]>
To: "Drakelist group" <[email protected]>
Sent: Wednesday, June 01, 2011 3:47 PM
Subject: Re: [Drakelist] R-4C Crystals (3rd Mixer LO)
Paul -
I don't have a T-4XC open at the moment, so can't measure. I agree that
the 1 Hz variation is nonsensical, the crystal is probably spec'd to +/-50
ppm, or about +/- 300 Hz. It could conceivably be that they spec'd a
'little' low to be sure that the actual frequency can be set, but again 1
Hz isn't enough to matter.
Maybe someone knows for sure? The earlier transmitters were just spec'd
as 5.645 MHz, so somebody thought it needed to be changed.! :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Paul Christensen wrote:
The R-4C's 3rd Mixer LO crystal for SSB/CW is 5644.999 kHz. Why didn't
Drake just specify 5645.0 kHz? The tolerance of the crystal is well
beyond 1 Hz and is likely +/- several hundred Hz. Perhaps a large
quantity price break for crystals ground below 5645 kHz?
Any Ideas?
Paul, W9AC
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
_______________________________________________
Drakelist mailing list
[email protected]
http://mailman.zerobeat.net/mailman/listinfo/drakelist
