|[AMRadio] Slow start crystal|
ronnie.hull at glowbugs.com
Thu Oct 18 19:50:35 EDT 2007
I had this same problem in one of my rangers. I need to dig back through my
notes and see what the problem was. I'll get back with ya rick
Ronnie - W5SUM
On Thu, 18 Oct 2007 14:39:08 -0500, Rick Brashear wrote
> Well, after retracing some of my steps I discovered a high
> resistance screw type connection on one of the capacitors in the
> buffer which seems was part of my oscillator problem or part of the
> reason I was getting such low drive. I also discovered a partially
> broken clip on the buffer (828) tube socket. With those two items
> repaired I am now getting ample drive, not excessive, but ample to
> the pa grids. Now I have encountered yet another oscillator woe. I
> have three (3) crystals for the 160 meter band, 1885 mc, 1975.15 mc
> and 1995 mc. I have the transmitter setup and neutralized for the 1885
> rock, however, it seems close enough when I use the other two also.
> Now for the problem. The oscillator starts instantly upon transmit
> when the 1975.15 rock is in use. When the 1895 crystal is in use
> there is a tiny delay, but with the 1885 rock there is sometimes as
> much as a 2 second delay before the oscillator kicks off. The 1885
> crystal fires instantly in other rigs or in my signal generator. Do
> you think the capacitance loading of the crystal has something to do
> with this? It's a booger bear to change the capacitors in the
> oscillator, so I would sure like an opinion or two before doing it.
> Thanks and sorry for the long winded explanation.
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