On 2024-01-16 13:14, Steve Wedge, W1ES/4 via groups.io wrote:
You¡¯re welcome, Joe.
Yes, swapping the crystal is the best way to determine a bad crystal.
Crystals....
I once got a tremendous flea market deal on a Galaxy V transceiver.
It was mint condition - absolutely brand new - the seller said that he had
taken the packing tape off the tubes. It had no power supply, and I built
one by rewinding a low-voltage power transformer.
Never really got any use out of that nice transceiver, because the BFO
crystals had wandered off frequency, and you couldn't trim them to frequency
without the amplitude going way down.
I had no clue how to source crystals that would work. This was before
the Internet, and one found stuff by perusing ads in printed magazines,
and making long distance phone calls.
I've been thinking: now there are programmable VFO chips (si5351a etc )
that can make any frequency you want. And they are seriously tiny. I bet
I could package one with a small CPU and a buffer amp. Might even be small
enough to replace a HC6/U.
- Jerry, KF6VB
