> YB400 Mute Mod
>Work Area = The lowest "472". Below and left of the speaker. (Use a magnfier
>see the numbers). Jump (solder) the top #472 pad to the pad directly below
>(Try with srewdriver 1st to make sure your on the right one). While using the
>up and down slew buttons you should here a lack of mute! That's it. It's very
>simple, but effective. There is less of "chirp" when using 1 kHz tuning
>steps.Has anyone found my fine tuning mod for the YB400 useful? I'm just
>looking for a little feedback.
>Thanks and good luck with this mod!
YB Mute 2
The mute mod for the YB worked, except for the auto tuning function on AM.
Well I finally found the right pads by trial and error.(You need the first mute
mod for this to work.)
There is a big silver rectangle cover in the middle when you pop the back off.
To the left top
hand corner there is a pad numbered 105. Directly below it, there are two pads.
Between the two
pads connect a 22K resistor. I put a piece of electrical tape over the top
right hand corner and
bent the resistor flat on top of it. You can experiment with different values.
If you just jump the
two with a wire or solder, you can here the stations go by but it never stops.
I found the 22K
stops at medium to weak stations. You will need to do one more thing. The
bottom right post on
the SSB switch wired to the botton of the 153 post. (below and left of the SSB
switch posts) You
need to do this so that the SSB and normal AM signals won't combine when you
flip the SSB
switch on.That's it.
I wish you luck. If you need help, let mw know.