I did not found in my country a 3 leads 4Mhz resonator. May I use 2 leads 4 Mhz resonator instead?, Thanks

The three lead ceramic resonator has two 30 pf capacitors which connect from either end of the resonator to the center pin. The two lead resonators do not have these capacitors. You may be able to use the two lead ceramic resonators if you add the capacitors externally. Mikewww.mikesflightdeck.comwww.mikesflightdeckbooks.com

I will do this, or a 4 MHZ crystal with two 22-27 pf capacitor.Thanks a lot Mike