Hi Rik that would work quite well, there were some parameters for the resonators at 4MHz discussed on the emrfd group recently. The parameter measurement methosd are the same, but they were using the
Hello Alan, thanks for the info. What I had in mind was a 501-504kHz filter so not as narrow as the 800Hz filter you designed. And as an input filter I wouldn't care about 10dB (or even more) inserti
Hello group, I just discovered that the European grossist for electronic parts has 500 kc ceramic resonators in their range for less than half a Euro. this is a great building block for a tunable 500
Incidentially I saw 500kHz resonators at Conrad.de for 0,61EUR each and Reichelt.de for 0,28EUR. vy73 Dennis DL6NVC -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter
Hi Rick there is a problem building a sharp ladder filter with 500 or 455 kHz resonators. I have played with a number. the difficulty seems to stem from the fact that to get a narow filter you have t
Pedro, I have a VXO with a 4MHz ceramic resonator. That signal is divided by 8. Range is 500.5 - 506kHz. see http://wireless.org.uk/500k_tx.gif http://wireless.org.uk/qtx.htm 4MHz cer. resonators are
