Gentlemen,
regarding the following:
At 01:18 PM 11/18/96 -0500, Brian Smithson wrote:
>I've always been running my 990 off the AC line until a few weeks ago when I
>hooked it up to my 40A power supply to see if that would help with some
>computer interference I was experiencing. It didn't, but I left it on the PS
>for grins. All has been well until this weekend.
>
>Sunday, I was casually operating sweepstakes and I noticed that I could hear
>my own voice distored through the headphones when I transmitted. At first I
>suspected my 15m dipole, but it happened on all bands on all my antennas.
And,
>I'm not sure I have the same problem, but I also hear my distorted voice in
>the speaker and also in headphones but not as loud. I don't have an ac supply.
>It is the DC model. Mine is about a month old and it WAS a problem on
>sweepstakes. Ive mostly operated it on cw contest. This was the first
>serious
>ssb it's done but I did noticed it before in some casual qso's. I also
>disconnected all the external connections with the exception of the
>DVS-2. At one point it was real loud and also was getting distorted audio
>reports. My problem could be different. I thought it was rf getting
>into the aduio. I use several ladder line fed antenns through tuners.
>Don't have that problem with the TS-830's
>Boy I love that radio. Still hve one.
>
>Bill Denton WA5DWX.
This is the one problem I have found with the FT-990. It does seem to be
vunerable to RF feedback thru external plug-in's, particularly, the external
speaker. I would, as I know others would, be curious about other experiences
and, hopefully, some solutions.
73, K8Joe"Palooka"
K8JP, K8JP/VA2, VP5/K8JP, VP5JP, ex-K8HKM, ex-KN8HKM
Secretary, NIDXA
[\] NAUI Diver
palooka@pyrotechnics.com
snail mail:
Joe Pontek, K8JP
P. O. Box 59573
Schaumburg, IL 60159-0573
(847) 885-8871 (home)
(847) 519-7420 (work)
(847) 619-3250 (FAX)
U.S.A.
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