[Antennas] Cushcraft R7 tuning dimensions

William A Kulze wak9 at cornell.edu
Mon Nov 16 10:24:16 EST 2009


I've got an R7 and recently found there are at least 3 versions of the manual. The key, I think, Is in the capacitors at the traps. One version had straight tubes and the other had full U-shaped trombones. Compare the pics in the manual to what you have. Sorry I can't find them quickly right now, but you should be able to find them in a search. The dimensions ARE different. Seems like when I first put mine up one band didn't come out anywhere near what was printed in the manual. And that one was from Cushcraft's site, and was a very blurry scan. When I have a chance I need to dig those out and compare to my setup. Hope this helps a bit.

Bill W2NVD

-----Original Message-----
From: antennas-bounces at mailman.qth.net [mailto:antennas-bounces at mailman.qth.net] On Behalf Of Dennis Wade
Sent: Sunday, November 15, 2009 2:32 AM
To: antennas at mailman.qth.net
Subject: [Antennas] Cushcraft R7 tuning dimensions

Good evening,

      I have the above subject antenna that I was given from a garage
sale.  It was taken down already, so I researched and found a manual
copy online.

      The scan quality however is very poor...poor enough that I can't
be sure of some of the dimensions listed.  All the other online
manuals seem to be the same (lack of) quality.

      If you have a good quality copy or an original, could someone
please confirm the lengths below.  The letters correspond to the ones
used in Figure 5 (in step 3 of assembly).

           Dimension         10 meters  A - 123 inches

                                    15 meters B - 15 5/8 inches

                                    17 meters C - 6 inches (?)

                                    20 meters D - 16 inches (?)

                                    30 meters E - 16 inches (?)

                                    40 meters F - 28 inches (CW)
                                                        22 inches (middle)
                                                        17 1/8 inches (phone)

          Any help is appreciated.  Thanks!

                 Dennis


-- 
I've been wondering lately..."Where am I going and why AM I in this
hand basket??"

-------------------------
Dennis L. Wade
KG6ZI
Carmichael, CA
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