[TowerTalk] Balun for HyGain TH7DX and Weep Holes

Don W7WLL w7wll at arrl.net
Sat Jan 20 13:31:35 EST 2018

I purchased and mounted a Balun Designs 1115s on a TH7DX to replace that 
'wonderful' BN-86 (second one). I made a SS sorta U bolt to hold it on the 
boom. Makes a secure mount. My recollection is pics can't be placed in text 
on this site but I've pics showing the mounting and the U bolt. If 
interested, contact me.

By the way, this is what Balun Designs noted in an email to me:

". . . Weep holes, however, are another question. Typically they are highly 
recommended to allow an exit path for condensate that will inevitably build 
up in any balun.  Unless the unit is hermetically sealed, the change in 
atmospheric pressure and humidity cause the problem. We recommend 2 holes no 
larger than 1/16 but I imagine there are still insects that can fit through 
that size so it would be your call..."

Because of how the BD box sits when mounted on the TH7 it was easy to 
determine where to put weep holes in the corner for easy drain.


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