After posting my reply, I saw the part number for the User and Service Manuals
in the parts list:
11276755 MANUAL,SERVICE 21-527 MS2100527
11277670 MANUAL,USERS 21-527 MU2100527
Maybe this will help you track down what you are looking for.
73 de Bob - KØRC in MN
----- Original Message -----
From: Robert Chudek - K0RC
To: amps@contesting.com
Sent: Thursday, September 06, 2007 9:11 AM
Subject: [Amps] Radio Shack Digital SWR/Power Meter
Too bad Radio Shack "modernized" their product support site. Now you have to
second guess where product documentation might be filed instead of putting a
Model Number into a search query. But here's the link to the meter, although it
shows no manual available like the RS rep said.
http://support.radioshack.com/productinfo/DocumentResults.asp?sku_id=21-527&Name=CB%20Accessories&Reuse=N
In the "Care and Maintenance" link, it refers to calibration which is covered
in the Service Manual (which can be purchased through your local Radio Shack
dealer). Yeah, right! In any case, you should be looking for the Service Manual
which has the information you are looking for.
They got one thing right, the illustration shows the sensor being mounted on
the antenna mast with a short coax jumper to the antenna under test. A three
conductor cable carries the information down to the display unit at your
operating position. It looks like a well-thought-out metering system. Whether
it's accurate or not is a different story!
Without the calibration instructions, you could test the accuracy by placing
different value resistors on the antenna terminal and checking the VSWR values
that are displayed. You might find it doesn't need calibration.
73 de Bob - KØRC in MN
----------------------------------------------------------------------
Message: 1
Date: Wed, 5 Sep 2007 16:54:23 -0400
From: "Bruce Lanning" <belanning@verizon.net>
Subject: [Amps] Radio Shack Digital SWR/Power Meter
To: <amps@contesting.com>
Message-ID: <002e01c7effe$f103fad0$2f01a8c0@BRUCE>
Content-Type: text/plain; charset="iso-8859-1"
Does anyone happen to have the calibration instructions or better yet a
manual for the Radio Shack 21-527 Digital SWR/Power Meter. Radio Shack tells me
that it is no longer available.
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