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Author Topic: wanted. user manual Techcessories swr meter  (Read 1414 times)
VK4FIAA
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Posts: 5




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« on: August 07, 2012, 02:57:49 AM »

have just acquired Techcessories SWR meter 21-524...chasing copy of user manual..pay costs
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K9YLI
Member

Posts: 865




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« Reply #1 on: August 07, 2012, 07:45:09 AM »

Any basic SWR meter...

.. put  switch in  calib mode.     Apply  power........... adjust  sensitivity  to max meter reading.
Remove power, set switch to SWR from  Calib.
re apply power and view  SWR on the meter.   tune up.

I seldom bother to adjust  in Calib. mode.
Just  tune for minimum indicated..  if it goes to  Zero SWR,  then maybe recalibrate to be sure the sensitivity  is at a point where it will show  SWR  when it is very minimum.

Now you have an op guide.
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N5VTU
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Posts: 363




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« Reply #2 on: August 07, 2012, 01:55:46 PM »

Strange...21-524 looks like a Radio Shack part number.  Even stranger, when I Googled it, it came back to a SWR/Power meter.  Link to operation guide below -


http://support.radioshack.com/support_electronics/doc33/33336.htm


Good Luck

Stephen
N5VTU
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K7KBN
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Posts: 2805




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« Reply #3 on: August 07, 2012, 08:54:53 PM »

I would add that a "perfect" SWR is not "1.0" as stated in the instructions that Stephen linked.  If it's a RATIO (which it is), it has to be referred to an accepted standard, which would make it "1.0:1".

1.0, by itself, is not a ratio.

Good sleuthing, Stephen!
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73
Pat K7KBN
CWO4 USNR Ret.
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