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 Ocf wire - results ? 
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Post Ocf wire - results ?
Anyone here running a full size 80 to 10 mtr windom ocf type wire antenna? Be interested to see what sort off results you are getting on the various bands and how you have it set out within your property and at what height is the centre ?

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Fri Oct 20, 2017 2:02 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Guys this is the rear garden where the full size wire will be going. Another idea is to fix the centre box off the windom to the wooden facia board on the rear off the house and slope the two lengths down to eithe side fence , or have support poles either size to raise the ends to around 20 foot in height.

Anyone advise / add any suggestions ?

Link : https://i.imgur.com/HcM5NZT.jpg

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Sat Oct 21, 2017 12:42 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Well I knocked up a OCF around 67ft fed it with ladderline back to 4-1 then a choke then a small run of coax to the shack, its only 40ft high and flat top it does ok I've worked stateside and India on voice a few times.
My delta loop was better on long range dx but I'm sticking it out with the OCF for a bit.
This is quiet on noise though compared to a dipole I had up fed directly with coax, I guess one dx wire totally different to a inter G wire, with this OCF I have put up I can work 40-10 easily and the 4-1 and ladder fed seem to like each other.
I did try a Carolina windom 10 years ago a 80special and that did ok if I remember but it had the two cylindrical devices one a balun and the other a line isolator if I'm not wrong and they weighed a bloody ton no good for flat top it look like a saggy pair of tits when up, really needed a centre support.
That's why I did mine with a dipole centre and ladder feed totally lightweight for 2 punting point either side nice and tight when hoisted up.

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Mark M0VMT
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Sat Oct 21, 2017 1:12 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
my home brew OCF is 45/90ft the short leg comes from the tennamast to the tower supported here into a 4-1 fed direct with coax.then runs out to trees .works ok ,but i get quite abit of noise.

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Sat Oct 21, 2017 1:44 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Ok cheers guys is there anything available that will support either end off the windom. The fibreglass telescopic versions don't look as if they would take the strain.

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Sat Oct 21, 2017 6:12 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
M0VMT wrote:
Well I knocked up a OCF around 67ft fed it with ladderline back to 4-1 then a choke then a small run of coax to the shack, its only 40ft high and flat top it does ok I've worked stateside and India on voice a few times.
My delta loop was better on long range dx but I'm sticking it out with the OCF for a bit.
This is quiet on noise though compared to a dipole I had up fed directly with coax, I guess one dx wire totally different to a inter G wire, with this OCF I have put up I can work 40-10 easily and the 4-1 and ladder fed seem to like each other.
I did try a Carolina windom 10 years ago a 80special and that did ok if I remember but it had the two cylindrical devices one a balun and the other a line isolator if I'm not wrong and they weighed a bloody ton no good for flat top it look like a saggy pair of tits when up, really needed a centre support.
That's why I did mine with a dipole centre and ladder feed totally lightweight for 2 mounting points either side nice and tight when hoisted up.

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Mark M0VMT
RSARS


Sat Oct 21, 2017 6:29 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Had a Carolina windom 80special here myself Mark and although I was impressed with the performance the total weight off the down section as you say was such that it caused series sag in the length. My new off centre fed is so much lighter, uses a better grade wire and was a fraction off the price. Seriously considering mounting the centre to he wooden facia board and having the two lengths in a v shape keeping the height off the ends to around 20 feet or so.

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Sat Oct 21, 2017 6:54 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
guys got a six foot metal support mast rising above the gutter level off the house. question is can I directly mount the balun off this off centre fed dipole to this metal pole and have both lengths off the wire sloping down to another further two metal support mast at the ends off the wires . coax would be coming from the balun mounted directly to the pole and down the pole and then along roof to shack window.

so from the above description ie. would using a metal support mast to hold the balun / coax effect the ant tuning etc. enough to make it a no no ? can use insulators at the far ends off the wires to keep the metal poles effecting anything .

any advice would be great.

_________________
Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Sun Oct 22, 2017 7:34 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
I would extend the metal mast a little so the balun has a little room away from the metal maybe use a small fibre glass stub, regards the other ends just make sure you use some form of insulation from the points or they may become part of the antenna :D

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Mark M0VMT
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Mon Oct 23, 2017 5:51 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Thanks Mark that's great yep got insulators for the ends off the wires and good idea re using a small fibreglass stub as obviously the balance within the box weighs very little so no problem there.

Going to need a new length off coax, where do you guys normally get your cable / connectors ? Probably require a max off around 25 feet max , decent rg8 mini okay on the sort off length or go for decent rg213 ?

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Mon Oct 23, 2017 10:28 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Not sure if your intended setup is going to work ,22 foot of the coax is part of the antenna system and should be vertical with a 1:1 choke.
I could never get mine to work that good, probably because i couldn't get the whole thing in the clear and high enough.

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Tue Oct 24, 2017 6:29 am
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Could be wrong and hopefully I am but the vertical radiator section was unique to the Carolina windom and was said to be debatable if the vertical radiator section idea actually worked.

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Icom IC7300 / Kenwood TS711e
5/8 wave 10mtr vertical ( Sirio 2016 ) / 80-10mtr OCF dipole / 10ele vine Yagi for 2mtr
Datong ASP ( TS711e )
Ameritron als600x s/s HF linear

QRV on 10 / 2 and 6 mtrs.


Tue Oct 24, 2017 7:09 am
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
I have a full size CW80 strung between two guyed 40ft masts, due to the weight of the feed section the feed point drops about 6 foot. I've got small winches with dacron on each end and I'll stick with the feed droop as I'm not wanting to put any more tension on the system.

It is running NNE - SSW and has given good ssb and cw contacts into VK / ZL, excellent into the states. Only use it for 40 & 80 so can't comment on the other bands.

imho, it can perform quite well but is a bit of a pig due to the baluns, choke and coax drop. I have considered to fit a fibreglass support for the feed point but it's working well enough - if it falls down then that'll be mkII :lol:

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Tue Oct 24, 2017 7:43 am
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
gm1zvj wrote:
Could be wrong and hopefully I am but the vertical radiator section was unique to the Carolina windom and was said to be debatable if the vertical radiator section idea actually worked.


It might have been designed so that the coax radiated ,yours might still do anyway so it might be still worth putting a choke in line to stop it.
Hope it all goes ok.

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Tue Oct 24, 2017 4:32 pm
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 Ocf wire - results ? 
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Post Re: Ocf wire - results ?
Main station antenna here for over 10 years.
Balun is attached to TV pole at chimney height, long leg back garden (plus a bit of friendly neighbours), short leg to lamp post on front boundary.
If noise level is low I can work Europe, Middle East, States, done some of Asia, (not a DX chaser) probably not high enough for great DX but very good NVIS.
Dimensions came from a Google back then, so not sure exactly, but is a 80m - 10m antenna, plus I get results on 6m too.
Also works on 5Mhz (probably due to not being brilliant SWR on 40m, but a happy mismatch)
Has a low profile so good for neighbours (most don't even notice) and no TVI reports!

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Tue Oct 24, 2017 4:55 pm
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