[time-nuts] 10811 Repair (was warmup / bad batch)

Jack Hudler jack at hudler.org
Mon Jan 22 21:15:24 EST 2007


A Crystal is not a apply DC power get oscillations out.
I think of it like a crystal glass that get thumped with your finger and the LC
resonator(s) keep it going and keep it pure.

Start reading 8-88 and pay attention to 8-95 if you don't have any output.

Jack


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf
Of Jason Rabel
Sent: Monday, January 22, 2007 7:50 PM
To: richard at karlquist.com; 'Discussion of precise time and frequency
measurement'
Subject: Re: [time-nuts] 10811 Repair (was warmup / bad batch)

What voltage goes to the crystal? I may have had my scope scale too high and
just didn't notice, but at first glance I don't think it was getting power.

Jason
 

-----Original Message-----

Yes, the black wires are the thermistor.

The crystal has three wires.  Two are actually connected
to the crystal electrodes.  The third is the case.  The
case is fastened to the casting with a screw.  The only
way the casting gets an electrical ground is by way of the
crystal ground screw and ground wire to the board.
The wires are welded to the crystal, so if you want to
disconnect one of them, you have to unsolder it from the
PC board.

Rick Karlquist N6RK


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