[VHFcontesting] CushCraft 729B Matching

[mikflathead at aol.com]

 Something from M squared?

 

 

-----Original Message-----
From: jimk8mr--- via VHFcontesting <vhfcontesting at contesting.com>
To: vhfcontesting <vhfcontesting at contesting.com>
Sent: Thu, May 5, 2016 3:11 pm
Subject: [VHFcontesting] CushCraft 729B Matching

Not exactly a contesting question, but I've encountered a problem with my CushCraft 729B 432 yogi. (And until I figure it out, I won't make many contest QSOs on 432  :-)   )


I noticed a higher than expected SWR - 2.5 or so - and figured it was probably a hardline connector problem. Went up the tower, no issues with the connector. Same VSWR looking into the antenna. I brought it down to ground level, working off a wooden deck at 10 feet. No adjustment of the matching network gets a good SWR at 432 MHz. I can get a good match around the 420 and 448 MHz range, but not at 432.


The matching network black box (a rigid coax phasing line) is clean & dry inside.


Any thoughts or experience with this issue? Any good replacement driven element assemblies that I might substitute?




73  -  Jim  K8MR 
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