Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old March 3rd 07, 07:49 PM posted to rec.radio.amateur.boatanchors
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 241
Default Themocouple RF antenna current meters.

You can easily determine if the meter is a remote reading meter or one with
a built in thermocouple. Put a digital ohmmeter on the meter leads. if the
resistance is very low, then the thermocuple is built in. If the resistance
reads tens of ohms or more, it is a simple dc meter that can be used for any
purpose.

I have found that many of the remote reading meters are not calibrated in
actual amps, but are relative reading.

Often the rf ammeters that are self contained contain a bakelite or formica
back to give clearance to the rf.

Colin K7FM


  #2   Report Post  
Old March 9th 07, 12:17 AM posted to rec.radio.amateur.boatanchors
external usenet poster
 
First recorded activity by RadioBanter: Aug 2006
Posts: 46
Default Themocouple RF antenna current meters.

"COLIN LAMB" writes:

You can easily determine if the meter is a remote reading meter or one with
a built in thermocouple. Put a digital ohmmeter on the meter leads. if the
resistance is very low, then the thermocuple is built in. If the resistance
reads tens of ohms or more, it is a simple dc meter that can be used for any
purpose.


I have found that many of the remote reading meters are not calibrated in
actual amps, but are relative reading.


Often the rf ammeters that are self contained contain a bakelite or formica
back to give clearance to the rf.


Colin K7FM



http://www.fairradio.com/catalog.php...witem&item=551

--
Steven D. Swift, , http://www.novatech-instr.com
NOVATECH INSTRUMENTS, INC. P.O. Box 55997
206.301.8986, fax 206.363.4367 Seattle, Washington 98155 USA

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
Current across the antenna loading coil - from scratch Yuri Blanarovich Antenna 558 April 25th 06 04:14 AM
Current and voltage distribution on an antenna. W. Watson Antenna 5 January 3rd 06 11:23 PM
Current in antenna loading coils controversy (*sigh*) Roy Lewallen Antenna 25 January 15th 04 09:11 PM
Current in antenna loading coils controversy Yuri Blanarovich Antenna 454 December 12th 03 03:39 PM
FA: BC442 Antenna current meter / relay unit Carl Heintz Boatanchors 0 November 10th 03 02:23 PM


All times are GMT +1. The time now is 01:04 PM.

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