[amsat-bb] Re: FT-847 Disaster
k7xq at elite.net
Tue Dec 25 11:42:31 PST 2007
Don't feel too bad Joe. Just last month I fried my IC-756 HF transceiver
radio. It now sits in the scrap bin at the Icom repair facility. A $900.00
loss. All finals and predriver transistors blown and a repair bill of over
$500.00 so I had it scrapped as I am sure other components were also close
to blown and would probably fail on its return back. It will be awhile
before I can get a replacement so pretty much out on all bands from HF to 6
meters now. The FT-847 is absolutely the best radio ever built for satellite
and EME work.
EME, Satellites, Meteor Scatter
CW, JT-65 , SSB
50 MHz: 2 X M2 6M7 1000 watts 2 X 3-500
144 MHz: 4 X XPOL M2 2MPX28 XPOL 1500 Watts Single GS35b
222 MHz: 1 X M2 5 W.L. 350 watts Single 8930
432 MHz: 4 X M2 9 W.L. Modified for XPOL 1500 Watts single GS35b
1296 MHz: 3.0 meter dish VE4MA circular feed 350 Watts single GS15
2304 MHz/2320 MHz/2424 MHz: 3.0 meter dish VE4MA circular feed 200 watts
10 GHz: early 2008
K7XQ Webpage: http://www.elite.net/~k7xq/k7xq.html
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of k7zt at suddenlink.net
Sent: Tuesday, December 25, 2007 6:58 AM
To: Art Goldman; amsat-bb at amsat.org
Subject: [amsat-bb] FT-847 Disaster
Many Thanks for all of the responses and Merry Christmas to all!
I have done some preliminary troubleshooting and have discovered the
The fuse and the electronic cap are fine. I get good voltage to one side of
the relay, the relay coil appears to be energized but the 12 VDC stops at
the relay. I did jumper the 12 volts to the other side of the relay and the
display lights up and I hear noise from the speaker. But no frequency
This is as far as I've gotten. I did note on the schematic that the relay
has two transistors (Q1118 & Q1122). Q1118 is labeled as H-V Protection on
the block diagram. Both of these devices connect to the relay (FL1001).
I've looked on both sides of the board and can't seem to locate these
- Joe K7ZT
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