| System | Target AY clock | Crystal (HC-49) | Divider | Result |
|---|---|---|---|---|
| ZX Spectrum 128 | 1.7734 MHz | 28.3744 MHz | 16 | 1.7734 MHz exact |
| MSX | 1.7898 MHz | 3.579545 MHz | 2 | 1.7897725 MHz (~exact) |
| Atari ST | 2.0000 MHz | 4.000 MHz | 2 | 2.0000 MHz exact |
| Pentagon | 1.7500 MHz | 14.000 MHz | 8 | **1.7500 MHz exact |
Crystals WIQD-XTAL(Q) Quartz CrystalHC49/4H; 11.05 x 4.7mm; 28.3750MHz; 20/20/-10 to 60C/10 FUND; LFXTAL024588B https://mou.sr/4oqBOa3
Crystals WE-XTAL Quartz CrystalHC49/4H; 11.05 x 4.7mm; 3.579545 MHz; Tol = +/-30 ppm; Stab = +/-50 ppm Temp Range: -20 to 70 C; Load Cap = 20 pF; LFXTAL003063B https://mou.sr/4vIl5kG
Crystals WIQD-XTAL(Q) Quartz CrystalHC49/4H; 11.05 x 4.7mm; 4.0MHz; 10/30/-40 to 85C/30 FUND; LFXTAL036900B https://mou.sr/4e9eYi8
14mhz not available on mouser https://www.ebay.co.uk/itm/166539482146