TS430S.5

Subject: MODS FOR THE KENWOOD TS430S FOR AMTOR.
THE MODS ARE AS FOLLOWS:-
ON THE I.F.BOARD CHANGE C-164 FROM 0.22MFD TO 10NFD..50V CHANGE C-60
FROM 10MFD TO 4.7MFD. 16V....
PARALLEL A 150KOHM RESISTOR ACROSS R.109 USUING A SMALL SWITCH OR
BY WHATEVER MEANS YOU CAN DESIGN TO SWITCH THIS RESISTOR IN AND OUT.
IN FOR ARQ AND OUT FOR ALL OTHER MODES. SOME PEOPLE USE THE SEND/REC
SWITCH, OTHERS HAVE USED THE NOISE BLANKER SWITCH. I HAVE USED A
SMALL MINI SWITCH WHICH I HAVE MOUNTED IN PLACE OF THE LEFT FRONT
RUBBER FOOT.
IT WILL PROBALY HELP TO CUT DIODE D-50 ON THE I.F.BOARD. IF YOU USE
A 500HZ FILTER IN THE CWN OR SSBN POSITION THEN PARALLEL A 10MFD
CAPACITOR ACROSS C-10 OR C-8. ADD A 10MFD CAPACITOR ACROSS C-161.(ACTUALLY
I FOUND THAT THESE LAST TWO WERE NOT NECESSARY IN MY 430S.)
YOU WILL FIND IT BEST TO TAKE THE AUDIO FROM IN FRONT OF THE VOLUME
CONTROL, BUT THOSE PEOPLE USUING AUDIO FROM THE SPEAKER SOCKET SEEM
TO GET OK RESULTS. REALLY YOU CAN GET AWAY WITH JUST THE FIRST TWO
MODS, CHANGE C-60 AND C-164. THIS ORIGINALLY CAME FROM VK2AGE. 73S
DE LARRY IN RAVENSHOE.

Subject: TS430 sensitivity mod/contacts
 Title: TS-430S Modification
Kenwood has an official modification service bulletin for low or inter-
mittent receive caused by poor contact on one or more filter relays.
I received the bulletin plus free parts today and it is bulletin #902.
This is a very common problem and is noticed when going from 3.999 to
4.000 mhz for example if a difference in sensitivity is noticed.  If
interested contact Kenwood Service for info.....73's Steve