Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old July 15th 05, 01:46 PM
Derek Twynham
 
Posts: n/a
Default

RADIO-----2 TRANSISTOR AMP-----SWR METER------ ANTENNA

Ok, when I check the SWR on my antenna it shows 1.1. When I turn the
amp on it shows over 3.x SWR. The antenna is rated at 5 KW. The amp
only puts out about 100 watts.


When I had this it was caused by arcing at the antenna. VSWR perfect with
low power, but it even made an audible noise when you screwed the power up.

1 - Try this using a band-pass filter:
RADIO--2 TRANSISTOR AMP--SWR METER--FILTER--DUMMY
If amp churns out **** then the filter will reflect it. If VSWR is good,
then:

2 - Eliminate your feeder (could be breaking down):
RADIO--2 TRANSISTOR AMP--SWR METER--FEEDER--DUMMY
When you do this you may even see a duff contact/joint.
If the feeder insulation is breaking down then VSWR rises again. If not
then:

3 - Check out the antenna / balun / feed points for strands of wire, smoke,
etc.





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
What would cause the SWR to go up drastically when I turn my amp on? Joeseph Equipment 15 July 27th 05 12:46 AM


All times are GMT +1. The time now is 10:16 AM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017