Re: side-tone frequency adjustment?
开云体育Is that a Sidetone Level control? I think he wants to adjust the sidetone frequency.Per manual……. The tone oscillator Q7 (2SC373) operates when the MODE switch is in CW position, and the key is closed. (Pin 10 grounded). It is a phase shift oscillator operating at approximately 800 Hz. The tone output is activated by the keying c i r c u i t and then coupled through SIDETONE LEVEL control VR4 to the receiver audio amplifier for sidetone monitoring in CW operation. The output from Q7 is also coupled to the VOX amplifier Q4 for semi break- in CW operation. You’d need to play with the RC values, my understanding. Fernando N2FQ/6
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Fernando Quinones N2FQ