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RE: [TowerTalk] 40/30 SteppIR

To: "'Jerry Keller'" <>, <>
Subject: RE: [TowerTalk] 40/30 SteppIR
From: "Joe Subich, K4IK" <>
Date: Thu, 7 Oct 2004 20:08:55 -0400
List-post: <>

> Could one not (eventually) obtain a "replacement" DE for a 
> MonstIR? Perhaps that could replace a 3L or 4L DE? 

It might be possible to substitute a MonstIR DE into the 3L 
yagi (20-6) but the 22:50 Ohm un-un would be a problem on 
40 and 30 meters.  Mike and Jim would need to design a relay 
switching arrangement to take out the un-un on 40 and 30 where 
the antenna would perform like a rotary dipole. 

> With a custom arrangement using replacement components, I'd 
> guess that the problem would be programming the controller, 
> but the possibility might eventually develop to "roll your 
> own", from a dipole to a long-boom multi-element yagi.

Reprogramming the existing controller isn't a big deal if one 
has access to the ATMEL tools.  The issues are a limit of five 
stepper motor drivers and no relay outputs to handle impedance 


   ... Joe, K4IK 


See:  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

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