| | VK2TV > HELP 06.11.04 21:12l 46 Lines 1179 Bytes #999 (0) @ WW
BID : A50089VK2TV
Read: GUEST
Subj: TS930 and TS430 problem
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VK4WIE<VK2JSM<VK2PYU<VK2TV
Sent: 041026/0753Z @:VK2TV.#MNC.NSW.AUS.OC #:60258 [Kempsey, QF68JX] $:A50089VK
From: VK2TV@VK2TV.#MNC.NSW.AUS.OC
To : HELP@WW
Hi Andre and others,
I wonder if your problem could be the same as one I encountered a couple of
years back with my TS 430.
In my case, I noticed that, in addition to the S meter reading full-scale,
the display was dim.
I traced the problem to the input capacitor to a 5 volt regulator on the IF
board. The 1uF capacitor (C118, 1uF/50VW electro), although measuring 1uF,
had gone high-Z and was not doing its job.
Because the capacitor was high-Z the regulator was "taking off". When viewed
with a CRO the 5v line showed about 4v DC with around 2v P-P of RF at about
500kHz. The 12v line was "alive" with this crud and this was radiating back
into the rig via the antenna at sufficient level to pin the S meter.
Maybe this will help you solve your problem.
Regards - Ray
Ray Wells
VK2TV @ VK2TV
vk2tv@dodo.com.au
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Message sent at: 17:51 on 2004-Oct-26
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