开云体育

ctrl + shift + ? for shortcuts
© 2025 开云体育
  1. Yaesu-FT-101
  2. Topics

side-tone frequency adjustment?

 

hi all
?
My 101 has a cw side-tone frequency of about 1310 cps.? according to the manual it's meant to be around 800 (which would fit with the cw filter)
?
Does anyone know of an easy (or difficult) way to adjust it, please?
?
My s/n is:
?
 

Control is inside under the top lid on the side opposite the final amplifier cage. It is normally labeled. ?? It is worth getting the manual (and the service manual). Lots of user-useful stuff is under the lid!? Google is your friend- copies are free.
?
73,
Tom ai4th
 

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

On Oct 19, 2024, at 11:38?AM, Tom ai4th <alnath14308@...> wrote:

Control is inside under the top lid on the side opposite the final amplifier cage. It is normally labeled. ?? It is worth getting the manual (and the service manual). Lots of user-useful stuff is under the lid!? Google is your friend- copies are free.
?
73,
Tom ai4th
 

Yep- I misunderstood the question. Thanks for the correction.
?
Tom ai4th
 

cool. I'll see if I can get the board out and have a fiddle. thanks!

1 - 5 of 5