[Yaesu] FT-101B

[William Hooper]

Two questions:  (a) has anyone discovered a cure for 160M RF
feedback?  Only on that band - when the carrier or the mike
gain controls are advanced - the feedback starts and gets
worse the further the controls are advanced - this happens
with mike plugged in or not and with antenna or shielded
dummy load. (b) I don't know why these things are not
polarity-protected (most DC radios are, i.e.: boat radios)
anyhow - the FT101B got reverse polarity and emitted a bunch
of smoke - no drive, no receive audio - still seems to go to
plate idle current when mike button is pressed.  Has anyone
out there dealt with a 101 that had been reverse polarized
on the 12V input and then had to find the trouble(s) and
repair?

Any help appreciated,

Bill  KF6AR

            Bill and Arlene Hooper

            billnroo at earthlink.net

            http://home.earthlink.net/~billnroo/

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