Source for 3.932160 MHz Crystal?
Posted: Mon Dec 30, 2019 11:25 pm
Hello all:
I am building up a Klyball Superboard 600 replica and have most parts for it on hand or ordered. I wasn't able to find a source for the 3.932160 MHz crystal. Unicorn Electronics has both 3.6864 Mhz and 4.000 Mhz, so I thought I would try those and see if they are close enough.
Any idea on the tolerance for the crystal? I imagine it depends on the monitor being used. A 4 MHz crystal will put the vertical refresh signal at around 61 Hz rather than 60 Hz, which is not too far off.
Another option could be to use a programmable oscillator chip like this one: https://www.digikey.com/products/en?key ... 2DC-PTB-ND
It is not a drop in replacement for a crystal but should work with some simple circuit modifications.
Regards,
Jeff
I am building up a Klyball Superboard 600 replica and have most parts for it on hand or ordered. I wasn't able to find a source for the 3.932160 MHz crystal. Unicorn Electronics has both 3.6864 Mhz and 4.000 Mhz, so I thought I would try those and see if they are close enough.
Any idea on the tolerance for the crystal? I imagine it depends on the monitor being used. A 4 MHz crystal will put the vertical refresh signal at around 61 Hz rather than 60 Hz, which is not too far off.
Another option could be to use a programmable oscillator chip like this one: https://www.digikey.com/products/en?key ... 2DC-PTB-ND
It is not a drop in replacement for a crystal but should work with some simple circuit modifications.
Regards,
Jeff