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40-2CD_&_TH7

Subject: 40-2CD_&_TH7
From: barry@w2up.wells.com (barry@w2up.wells.com)
Date: Sat May 7 16:40:41 1994
price@nosc.mil (James N. Price) (by way of price@cod.nosc.mil) writes:

> the 40-2CD goes on top still, but with the support brace inverted
> (Vee shape underneath) to get it to the top of the mast,
> 
> the TH-7 mounts 90 degrees to the 40-2CD, as far away from it as
> possible,
> 
> 73--Jim, K6ZH, price@nosc.mil
> 
> 
> 

Just a few comments...
If you invert the 40-2CD support brace, it MAY not provide adequate
support. When on top, all you deal with is tension. When on bottom, you 
have to consider buckling.  Does anyone know if it will work that way as 
supplied by cushcraft? I'd be interested in a true engineering-type 
analysis, not just some anecdotal stories of how well it works.

I have my 40-2CD about 8-9 feet above my TH7 (parallel elements). 20 
meters has been fine. I havn't been thrilled with 10 and 15 though. Has 
anyone else had a similar good experience mounting the 2 antennas 90 
degrees from each other?

73 Barry


Barry N. Kutner, W2UP       Usenet/Internet: barry@w2up.wells.com
Newtown, PA                 Packet Radio: W2UP @ WB3JOE.#EPA.PA.USA.NA
                            Packet Cluster: W2UP >K2TW (FRC)
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