[TMC] GPR-90 6BE6

[Richard Knoppow]

    In the opposite direction many grid dip meters will work for testing 
crystals. My Millen works well. You must make an adapter that fits the 
coil socket, be careful of using screws that might stretch the contacts. 
When you connect the crystal work the tuning capacitor across its range 
to find where the crystal oscillates best. The oscillation will be 
displayed on the current meter. Usually there is enough output to to 
work a counter and certainly a radio receiver will pick it up. The 
setting of the GDO capacitor will give some idea of the correct load cap 
for the crystal.

On 8/28/2016 6:18 PM, Jim Haynes wrote:
> A friend says a cheap way to test the crystal is to plug in a cheap
> TV color burst crystal and see if it keeps oscillating.
>
>

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL