[Premium-Rx] WJ 8718 - Module A3 - component value inquire

[Ahmet Gundes]

Thank you very much for the great help Geoff.

I will replace it with a 10 Ohm resistor as both 
IF filters are installed in the module i got .

A3 module has REVB stamped on it.  Individual
boards have REVA stamped.  I am not sure how one can
tell which version this would be.

They used the Orange talantalums in this one. I will
be replacing them as well.

Again I appreciate the quick response. Repair will be
done before the weekend's over. 

Regards,
Ahmet



> 
> Hi,
> 
>   The book shows seven different versions for the 791592  A3 board  
> ( -1 thru -7)  all but dash 4 use a 10 ohm resistor for R30 and the 
> dash 4 uses a 22 ohm resistor.  FL1 in the dash 4 version has the 
> filter replaced with several resistors.  This info is out a NAV 
> version book dated 10/83.
> 
>   Your radio probably uses the infamous red end tantalum caps.  
> When they fail they tend to damage things around them.  I would 
> change these caps to mil spec m39003 series.
> 
> Regards,
> Geoff Greer
> 
> ----- Original Message ----- From: "Ahmet Gundes" <ahmet-m at usa.com>
> To: "Premium-RX" <premium-rx at ml.skirrow.org>
> Sent: Sunday, December 11, 2005 6:25 PM
> Subject: [Premium-Rx] WJ 8718 - Module A3 - component value inquire
> 
> 
> 
> WJ 8718 / Module A3 ( First & Second Mixer Module )
> 
> I would greatly appreciate it if anyone who has the
> WJ8718 manual could please check their Manual to let
> me know the resistance value of R-30 which is the
> Resistor on the Second Mixer board (370646 ) right
> behind the 10.7MHz Crystal Second IF Filter.
> 
> My book only shows the earlier version Second Mixer
> Board where apparently they did not use this resistor.
> 
> I am trying to repair the module and need to know the
> resistance value of R30.
> 
> A3 module I got here, inidicates RevB for the module
> and RevA for the 370646 board.
> 
> Thank you.
> Ahmet
> 
> 
> 
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