Hope my posting helps alot of people out there who are not aware of the
specs of the small PROP PITCH rotator. Here are some fast facts and a
place to get more info.
1, The article in June 1949 QST was dreamed up by a fellow who did not
have a big array and wanted his antenna to turn faster.
2,By having the modification done,and if you have a sizeable antenna
load the P/P will windmill. . This has been proven by my using two
"mod units" on two towers using a TH6DXX tribander and by many other
radio operators on "towertalk"alone.
3,If you don't have a modified P/P and run the motor over 9,000 rpm, you
will first burn out the brushes and second the rest of the unit. The
prop pitch was designed to run at 24-28 volts dc..
*****************************************************************
SOMETIME AGO I PUT TOGETHER A BOOKLET (56 PAGES) CALLED
"EVERYTHING YOU WANTED TO KNOW ABOUT YOUR PROP PITCH ROTATOR" The
booklet contains the Curtis Wright Manual and all articles/reprints on
the P/P since 1949 from QST,CQ and more. Copies can be obtained from
FIRST CALL COMMUNICATIONS- Email at firstcall@cyburban.com. Cost is
$10.00 plus $3.00 US Mail
If anyone needs an (unmodified) Prop Pitch unit, please contact me. I
still have several left that I refurbished last year. These units come
with the standard side trust bearing plate. Also there was one fellow
on towertalk that needed a big rotator. I have an original TELREX
ROTATOR SYSTEM (control compass) in the wooden box it came in.. Never
used.
An interesting little comment is that I first got into Curtis Wright
units when they sold for $5.00 at Harrison Radio on Greenwich Street in
Manhattan in the middle 1950s
Hope the above info helps out a little.
Joel Kornreich, K2QBV
FIRST CALL COMMUNICATIONS,INC
(a direct distributor for US TOWER CORPORATION)
Toll free 800 HAMTOWER
E mail >firstcall@cyburban.com<
Web page. www.firstcallcom.net
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|