Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old November 19th 03, 07:47 PM
RonE
 
Posts: n/a
Default Yeasu FT-990 runnaway power

I recently acquired a "dead" Ft-990.

I got the receiver running and found I had a bad T/R relay, got that
replaced, now I have 100++ power out on all bands no matter where the RF Pwr
knob is set. I have come a long way from a dead transceiver, but the rig is
still unusable as is since the output cannot be adjusted. I did see a
voltage change from ~-6 volts to about +.3 volts at a test point shown in
the service manual. I thought I'd drop a quick note in here to see if
someone may have run into a similar issue with the 990 in the past. I THINK
the problem is on the RF card, but am not sure. The service manual is great
for schematics and part numbers, but is seriously lacking in theory.

Anyhow, any help / suggestions would be great. remove the "spam" to email
me directly, if you like.

Ron E.
W0IFL



Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wanted: Power Supply for TR-4C KA9S-3_Jeff Boatanchors 20 December 16th 04 08:51 AM
Wanted: Power Supply for TR-4C KA9S-3_Jeff Boatanchors 0 December 8th 04 10:31 PM
Yeasu FT-990 runnaway power RonE Equipment 6 November 20th 03 04:14 PM
Derivation of the Reflection Coefficient? Dr. Slick Antenna 104 September 6th 03 02:27 AM


All times are GMT +1. The time now is 11:27 AM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017