I suffer with the inability to walk away from an electronics
malfunction...can't sleep, can't think of anything else. Turns out that the
22 uFD electrolytic where the 12.8 V comes into the signaling unit had
failed. I took it out and the thing worked for a few seconds. I measured
the resistance of the in-series 10 ohm surface mount resistor preceeding the
cap and it was reading 750 ohms. I jumped it with a 10 ohm resistor and
everything started working.
I suppose the heat from the soldering iron may have screwed up that
resistor, but it seems unlikely. Danged if I know! Ain't electronics fun?
Anyway, I STILL wonder if it's possible to find circuit boards for the
TKR720/820.
de WD7F
John in Tucson
----- Original Message -----
From: "WD7F - John in Tucson" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Sunday, November 26, 2006 12:46 PM
Subject: [Repeater-Builder] TKR-720/820
Can anyone tell me a source for parts for the TKR-720/820 repeater. Is
Kenwood the only source? I have a Signaling Unit that crapped out.
Somebody on the board is dragging down the 5V regulated and it's not easy
for this old guy to see that tiny stuff, let alone solder it.
de WD7F
John in Tucson
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