[Wswss] [FFMA] Re: [PNWVHFS] Re: M2 6M5

Mon Jul 20 02:00:25 EDT 2015

Hal,
    Off hand I would think the matching stub is frequency dependent and 
the same for either type antenna but maybe they were different? They are 
probably rather broad in frequency range. I have 2 of the original the 
6M5 antennas and the UHF N center pin was defective on one of the 
blocks. I ordered another UHF connector from M2 which came with the 
potting material. Digging out the old potting material was a chore and 
soldering was a bit of fun and hard to see what your were doing.  
Possibly the 70 ohm stub is defective  from lightening or some other 
reason like high power or high SWR? You may have a short, open or bad 
connection inside one of the blocks. I would think that would show as a 
SWR problem on that antenna. You could substitute a 50 ohm dummy load 
for each antenna one at a time or use four to check out the phasing 
lines? I would assume your SWR is good for the system? 
    73 and good luck    Phil N0KE

'Hal Goodell, N7NW' n7nw.hal.lt at comcast.net [FFMA] wrote:
>  
>
> Hi Lance and all,
>
> I just had a problem with my four 6M5X's. The T Matching blocks on my
> antennas have UHF fittings. One block center pin had deteriorated and was
> arcing on transmit. Had affected my receive for quite a while. When I 
> took
> the antenna down to fix it is when I found the problem. My neighbor 
> had a T
> Matching block from a older 6M5. Cool, we cut it to the length of the 
> 6M5X
> block Additionally it had a N connector. So that was also. good. After
> replacement and up in the air I did some tests. NO ECHOS AND CANT HEAR A
> THING OFF THE MOON. I think the phase of the 6M5 modified match is
> different.
>
> So will be taking the antenna off once again and replacing the match with
> one that I know is in phase with the rest. I haven't confirmed this yet,
> hope to do so tomorrow, but it is the only think I can think would 
> give me
> the effect I am seeing.
>
> So just a caution about trying to match the 6M5 antenna with a 6M5X. The
> modification kit just has you cut the length of the matching block 
> elements.
> They may be out of phase!!
>
> Hal, N7NW
>
> -----Original Message-----
> From: Lance Collister, W7GJ
> Sent: Sunday, July 19, 2015 7:09 PM
> To: Shane Autrey ; 50mhz ; newsvhf at mailman.qth.net ; RMVHF+ ;
> FFMA at yahoogroups.com ; PNWVHFS ; Western States Weak Signal Society
> Subject: [PNWVHFS] Re: M2 6M5
>
> Can anyone help KI4M find a second M2 6M5 yagi? I guess he is looking for
> the one
> prior to the 6M5X, but I am sure a 6M5X would be OK too, since he could
> probably
> still get the conversion kit to make his 6M5 a 6M5X. TNX and VY 73, Lance
>
> On 7/19/2015 8:54 PM, Shane Autrey wrote:
> > Lance;
> > If you don't mind can you keep an ear out for anyone wanting to part
> > with the original design 6M5 antenna? I have one here that needs a mate
> > and would like to find one to stack with.
> >
> > 73 sir
> > Shane KI4M
> >
>
> -- 
> Lance Collister, W7GJ
> (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ, E6M, 
> TX5K,
> KH8/W7GJ, V6M)
> P.O. Box 73
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>
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>
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> Posted by: "Hal Goodell, N7NW" <n7nw.hal.lt at comcast.net>
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