[TowerTalk] Let's give COMTEK it's earned reputatioin ref10m COMTEK 4 sq unit

[Brooks90@aol.com]

Hi All,  I have to agree with Dinsterdog that COMTEK has a fine circuit, has 
been very reliable in my following of 4 sqr. development.  Also, Jim Miller , 
 K4 SQR, is honest as the day is long and what I'm missing here is if he  has 
been consulted about this issue, as I'm sure he will do whatever to make it 
right, whether or not there is a part, etc. problem.   Both his design and 
his reliability/back up are "right on".  Cheers,  Steve  K1PEK 



In a message dated 3/18/2001 5:05:15 PM Eastern Standard Time, K3BU@aol.com 
writes:

<< In a message dated 3/18/2001 15:19:50 Eastern Standard Time, Dinsterdog 
 writes:
 
 > 
 >  From my experience of using the comtek system, I suggest first to measure 
 F/
 > B.  If you don't noitce any,  check the dummy load connection.  If it is 
 > hooked up right, and you see the power dump varying across the band, then 
 you 
 > have some sort of array action going-  Also, look for a resonant jump in 
 the 
 > array vs were the individual dipoles are tuned.
 >  
 >  Sounds like you already know about these types of test, but just very 
 > curious as to the spacing, dimensions of the dipoles, etc......can you 
give 
 > some information regarding this???? 
 >  
 >  I have had a few years of experience with Comtek Systems and have found 
 > their equipment to be very, very relaible- Maybe you got a hybred coupler 
 > accidently shipped to you for the wrong band? Will be interesting to see 
 > whats up-
 
 Well, 10m unit behaves much differently than 160 and 80 ones I have, testing 
 with noninductive resitors plugged right into the connectors. Never mind 
what 
 is connected to the box. Coupler doesn't work on any other band, the "best" 
 band is 10m, but it is all confused.
 
 The array is quarter wave spaced 4 square of vertical (Al abt 1") tubing 
 dipoles. They check out as modeled, no problem with coaxes, double checked, 
 MFJ dipped, etc.
 If the box will be OK (fixed ?) the question is can it handle radiators with 
 abt 110 ohms impedances? Books say nothing.
 
 Yuri
  >>

--
FAQ on WWW:               http://www.contesting.com/FAQ/towertalk
Submissions:              towertalk@contesting.com
Administrative requests:  towertalk-REQUEST@contesting.com
Problems:                 owner-towertalk@contesting.com