[AMRadio] Slow start crystal


ronnie.hull 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.
> 
> Rick/K5IAR
> 
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