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 Sigma Venom Silver Hot Rod 5/8 wave (tinkering)

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Savwafare10
New Member
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Savwafare10

Call Sign : 2-CT-351
Posts : 5
Times Thanked : 0
Join date : 2020-07-09
QTH or Location : Greeley / Evans
Equipment Used : Kenwood TS450s TS440s Icom 706MK2 Sigma Venom 5/8 wave with home brew ground radials (8) Drake R 4B- T 4xB (twins) 4el LFA soon to go up in the air/

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PostSubject: Sigma Venom Silver Hot Rod 5/8 wave (tinkering)   Sigma Venom Silver Hot Rod 5/8 wave (tinkering) Icon_minitimeWed Oct 13, 2021 1:34 am

I ordered one of these Sigma Venom 5/8 wave and I got to say over my Imax 2000 that had a factory defect. I feel  almost back in the 80's.  I had a Radio Shack Crossbow64 back then, and of corse the conditions were crazy back then.  I also aquired the Rigexprt 35zoom about a yr ago,  then just had to get  the Nano VNA, the rigexprt has now quit working and out of warrenty...oh well...  any who, I took the seeming silly 3 short radials off the Sigma,  added 2) maco V1500 Ground plane hubs and running 8 radials. Seems I changed the take off angle a little more tah I should have. Works "ok" for local, but shines even better when DX is in...  I should note on the tune of the Sigma for the USA possable buyer,  they tune 1.0 :1 swr @50ohms around 27.500/600 in stock form. With the ground radials, it seemed to "widen" the  low SWR range. I'd say a good 60/70 Channel spread. Impedance does change a bit when you get awat from  your "sweet spot" of a tune. But nothing crazy. I get Snow, Ice, Wind, Rain,  here at my location. Last winter, I thought I lost it, wind and sleet made for heavy ice build up and a serious "lean".  Took it down and got the "kinks" out and back together...  Tower may go up soon, my climbing abilities are fading. May have to resort back to a imax 2000 a top of the 4el LFA. Just have to see.  This cycle 25 so far, has been a great awakening and  a re kindle of those ol  1980's days on air. Antenna theory hasn't changed though. 73 2CT351.

Alan - Mirror Man, Roboed and Rjbingham like this post

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Alan - Mirror Man
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Alan - Mirror Man

Call Sign : 108CT233
Posts : 193
Times Thanked : 14
Join date : 2019-12-01
QTH or Location : Central Scotland
Equipment Used : CRT SS9900 Beofeng UV5R Yaesu FTDX1200 CRT Micron CRT FP00 Sattelite 2000 antenna ZS6BKW X30 co-linear

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PostSubject: Re: Sigma Venom Silver Hot Rod 5/8 wave (tinkering)   Sigma Venom Silver Hot Rod 5/8 wave (tinkering) Icon_minitimeMon Oct 25, 2021 2:31 pm

It does seem you can't go wrong with the original Silver Rod style antenna at times, I have just made several Short Skip contacts with my half wave Ringo vertical and I am pleased to say that included several Charlie Tango stations.  Great bandwidth and not so noisy when the weather isn't so great either I notice over the fiberglass antennas.
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