New YB400 Mute Mod

New YB400 Mute Mod

Post by Rick W 9 » Thu, 04 Dec 1997 04:00:00


                                         YB400 Mute Mod

Work Area = The lowest "472". Below and left of the speaker. (Use a magnfier to
see the numbers). Jump (solder) the top #472 pad to the pad directly below it.
(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!

 
 
 

New YB400 Mute Mod

Post by Rick W 9 » Wed, 24 Dec 1997 04:00:00


Quote:> YB400 Mute Mod

>Work Area = The lowest "472". Below and left of the speaker. (Use a magnfier
>to
>see the numbers). Jump (solder) the top #472 pad to the pad directly below
>it.
>(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.
 
 
 

New YB400 Mute Mod

Post by Howard N. Lut » Sat, 27 Dec 1997 04:00:00


> > YB400 Mute Mod

> >Work Area = The lowest "472". Below and left of the speaker. (Use a magnfier
> >to
> >see the numbers). Jump (solder) the top #472 pad to the pad directly below
> >it.
> >(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.

Well...that's IS one way and by gawd, it works well. I still don't have
a schematic so I can only reply on the results and not the theory. Good
work Rick! You've 'bout breadboarded the ***y YB by now!
friend,
Lute

--
********************************************************************

********************************************************************
SHIPPING / BILLING ADDRESS:

Optimum Camel Companies, Ltd.
Howard & Kelly Lute
402 Marina Blvd.
Suisun City, CA  94585
tele:707-428-4787

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New YB400 Mute Mod

Post by Rick W 9 » Sat, 27 Dec 1997 04:00:00

Glad it worked for you! Now if we could figure out how to make the auto tune
OUT of band, that would be even better!
By the way, do you know if the Sony 7600G mutes while scanning?

 
 
 

New YB400 Mute Mod

Post by David W. Knisel » Sun, 28 Dec 1997 04:00:00

Hi there.  You asked:

Quote:> By the way, do you know if the Sony 7600G mutes while scanning?

Yes, it mutes during the scan mode, but does not mute when you are
manually tuning by holding the fine tuning button down and are manually
slewing the frequency.
--

Prairie Astronomy Club, Inc.  http://www.4w.com/pac
***********************************************
*  Attend the 5th Annual NEBRASKA STAR PARTY  *
*  July 18-25, 1998    http://www.4w.com/nsp  *
***********************************************
 
 
 

New YB400 Mute Mod

Post by David W. Knisel » Sun, 28 Dec 1997 04:00:00

Hi there.  You asked:

Quote:> By the way, do you know if the Sony 7600G mutes while scanning?

Yes, it mutes when in the scan mode, but does not mute when you are
manually tuning by holding the fine tuning button down and are manually
slewing the frequency.
--

Prairie Astronomy Club, Inc.  http://www.4w.com/pac
***********************************************
*  Attend the 5th Annual NEBRASKA STAR PARTY  *
*  July 18-25, 1998    http://www.4w.com/nsp  *
***********************************************
 
 
 

New YB400 Mute Mod

Post by Howard and Kelly Lut » Sun, 28 Dec 1997 04:00:00

Yes it does...


> Glad it worked for you! Now if we could figure out how to make the auto tune
> OUT of band, that would be even better!
> By the way, do you know if the Sony 7600G mutes while scanning?

 
 
 

New YB400 Mute Mod

Post by Rick W 9 » Sun, 18 Jan 1998 04:00:00

YB Mute 2 is WRONG! (see later post or Email me)

Quote:>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.