[50mhz] 6M power divider

KD5SFA divenut1 at sprynet.com
Fri Apr 28 15:53:23 EDT 2006


I wasn't aware that LMR-600 was available in 75 ohm.
Now that I've seen the data sheet....of course the connectors 
are different too...

73,
Jon
KD5SFA
-----Original Message-----
>From: Gary  - N3JPU <n3jpu at speakeasy.net>
>Sent: Apr 28, 2006 3:39 PM
>To: 'Lance Collister' <w7gj at accessoutwest.com>
>Cc: 'World Wide Six Meter Club' <sixclub at mailman.qth.net>, '50 MHz Reflector' <50mhz at mailman.qth.net>
>Subject: RE: [50mhz] 6M power divider
>
>How does the loss compare to other power divider methods?
>
>On my original stacked 6M antennas there was no LMR 600 and used RG-11
>before I knew better. It did not hold up well and got very flaky with power.
>
>Gary Mitchelson
>N3JPU Montgomery Co. MD  FM19
>USAF MARS and SHARES: AFA1PU/AFF1MD/AFF1M 
>http://www.mitchelson.org/ 
>
>-----Original Message-----
>From: Lance Collister [mailto:w7gj at accessoutwest.com] 
>Sent: Thursday, April 27, 2006 21:27
>To: Gary - N3JPU
>Cc: '50 MHz Reflector'; 'World Wide Six Meter Club'
>Subject: Re: [50mhz] 6M power divider
>
> 
>Hello Gary,
>
>I suggest you look at using two 1/4 wavelength pieces of 75 ohm LMR600.  
>That will enable you to have a very low loss power divider capable of 
>handling plenty of power. If you want to be extra safe about it, you can 
>always use a T connector in the middle using a 7/16 DIN connector, and 
>also get DIN connectors for the center end of each 1/4 wavelength section. 
>
>You can trim the coax pieces to the proper length by using something 
>like an MFJ Antenna Analyzer.  A quarter wave line section at 50.150 
>will also be a half wavelength at 100.300 MHz.  If you short the far end 
>of that line section, it also should look like a short at 100.300 MHz.  
>Just keep trimming it off and shorting the end until it comes up to that 
>frequency.  That is exactly the method I used to tune my phasing lines 
>to a multiple of a half wavelength in my EME array.
>
>GL and VY 73, Lance
>
>-- 
>Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8)
>P.O. Box 73 Frenchtown, MT  59834  USA
>QTH: DN27UB
>TEL: (406) 626-5728   
>URL: http://www.bigskyspaces.com/w7gj
>2m DXCC #11, 6m DXCC #815
>
>
>
>Moderator: Ray Brown, KB0STN
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