Re: Kenwood TS430 band filter relays



Hello Ive got a TS430s I found a website that has a lot

of mods and solutions hope this is helpfull, the text below from the page on
this link

http://www.qsl.net/ve7lgp/kenwood/Modifications%20for%20the%20Kenwood%20TS-4
30.htm

(copy paste into browser)

(there is also a diagram)

- the page is quite long go almost to the bottom

from G8IFW

Quote ....



Low or intermittent receive on the TS-430S may be caused by a poor contact
on one or more of the LPF relays. In most cases the following procedure will
correct this problem without having to replace relays. The procedure has two
steps; first initial cleaning of the contact by passing a relatively high
current thru them (about 500 mA), and then installing a contact maintenance
circuit that will apply a relatively low current (about 8 mA) whenever a new
band is selected.

Procedure:

1.. Initial contact cleaning procedure.
Parts List:
56 ohm 5W ceramic resistor (R92-0622-05)? 2 mA


1.. Press and hold the "UP" bandswitch of the TS-430S (ensure the 1 MHz
switch is ON).
2.. Apply 13.8V DC to the antenna terminal thru a 28 ohm, 10W resistor
for approximately 1 minute. This will cycle thru all the relays and burn any
axidation/contamination from the contacts.


.