Chuck -
Also check the mounting screws for the board. Ground is picked up
through them. Loosen 1/4 turn and retighten.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-B, C-Line&
TR-4/C Service Supplement CDs
<www.k4oah.com>
Chuck Grandgent wrote:
Yes, C192 was also part of the Hayseed recapping.
I will check D16.
The erratic operation (better characterized as failing to stay in
oscillation) was there both before and after the recapping, with the
same modus operandi.
I do also have a spare 100khz crystal, same form factor, I suppose I
could try that too.
Chuck, K1OM
On Mon, Oct 25, 2010 at 4:37 PM, Garey Barrell <[email protected]
<mailto:[email protected]>> wrote:
Chuck -
Does Tom's kit include C192? I think it does. If not ....
Also D16.
And with the erratic operation, solder joints on C190, etc. Tough
places to solder.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-B, C-Line&
TR-4/C Service Supplement CDs
<www.k4oah.com <http://www.k4oah.com>>
Chuck Grandgent wrote:
My R4B crystal calibrator has been acting erratically.
Often does not function until the R4B has been on for 20
minutes or so.
When I first turn on the calibrator function, I can initially
hear it for maybe 100msec, but it does not stay in oscillation.
And when it's being persnickety, when it does stay in
oscillation, it doesn't sound like a clean sine-wave.
Last night it was acting like this. But just now, it was
fine. Came up right off, sounded fine, and was working OK on
15 meters (didn't try 10 meters).
I recently did the Hayseed re-capping, so C190 was replaced,
and after the recapping it seemed to really help the crystal
calibrator function, as it was much worse before the recapping.
What else might I check ? I see the calibrator circuitry on
the schematic. My scope is still down for repairs.
Chuck, K1OM
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