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Posts : 27 Times Thanked : 0 Join date : 2021-01-30 QTH or Location : Manningtree Equipment Used : None
Subject: Antenna tuning Sun Jan 31, 2021 4:35 pm
Hi
I've been reading about checking antenna tuning. If you buy a decent Antenna would it still need to be tuned? Hamish
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NUBSTER 10 + Year member
Call Sign : 26 CT050 26 FB080 26 WT105 26 TE171 Posts : 948 Times Thanked : 51 Join date : 2019-06-27 QTH or Location : NORTH LONDON Equipment Used : ORIGINAL President Lincoln, President Teddy , Silver Eagle microphones , Gainmaster antenna, use a AMP ofcourse I do sometimes Age : 66
Subject: Re: Antenna tuning Sun Jan 31, 2021 4:53 pm
Yes all antennas have to be tuned (SWR ed) as we call it via using a SWR meter
Alan Pilot Major contributor
Call Sign : 163-CT-220... Posts : 2632 Times Thanked : 70 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7610,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 16
Subject: Re: Antenna tuning Sun Jan 31, 2021 6:00 pm
As above all 11m antenna's need tuning not hard to do but you will need a SWR metre. Unless it's a
SQBM500P MkII .
Just having a laugh it's Sunday.
Haggis New Member
Posts : 27 Times Thanked : 0 Join date : 2021-01-30 QTH or Location : Manningtree Equipment Used : None
Subject: Re: Antenna tuning Sun Jan 31, 2021 6:32 pm
Alan Pilot wrote:
As above all 11m antenna's need tuning not hard to do but you will need a SWR metre. Unless it's a
SQBM500P MkII .
Just having a laugh it's Sunday.
Sorry straight over my head !
Alan Pilot Major contributor
Call Sign : 163-CT-220... Posts : 2632 Times Thanked : 70 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7610,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 16
Subject: Re: Antenna tuning Sun Jan 31, 2021 6:38 pm
Just winding our Martin up. The SQBM500P MkII id a dual band 2m/70cm aerial comes pre-tuned.
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NUBSTER 10 + Year member
Call Sign : 26 CT050 26 FB080 26 WT105 26 TE171 Posts : 948 Times Thanked : 51 Join date : 2019-06-27 QTH or Location : NORTH LONDON Equipment Used : ORIGINAL President Lincoln, President Teddy , Silver Eagle microphones , Gainmaster antenna, use a AMP ofcourse I do sometimes Age : 66
Subject: Re: Antenna tuning Sun Jan 31, 2021 6:42 pm
It's a dyslexic antenna LOL Actually did wonder what you was on about at first
Alan Pilot Major contributor
Call Sign : 163-CT-220... Posts : 2632 Times Thanked : 70 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7610,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 16
Subject: Re: Antenna tuning Sun Jan 31, 2021 6:48 pm
NUBSTER wrote:
It's a dyslexic antenna LOL Actually did wonder what you was on about at first
Are pictures better they are for me lol. https://www.moonraker.eu/sqbm500p-mkii-dual-band-2-70-vertical-super-gainer-so239-3635
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NUBSTER 10 + Year member
Call Sign : 26 CT050 26 FB080 26 WT105 26 TE171 Posts : 948 Times Thanked : 51 Join date : 2019-06-27 QTH or Location : NORTH LONDON Equipment Used : ORIGINAL President Lincoln, President Teddy , Silver Eagle microphones , Gainmaster antenna, use a AMP ofcourse I do sometimes Age : 66
Subject: Re: Antenna tuning Sun Jan 31, 2021 7:14 pm
Cheers Alan pics are better ,I know what it is now my mate has one
Sydthecat CT Directors
Call Sign : 2E0VRX Posts : 776 Times Thanked : 47 Join date : 2019-06-27 QTH or Location : Yorkshire dales Equipment Used : Yaesu FTdx 101d, MD200 mic ,Mosley 3ele Yagi Age : 59
Subject: Re: Antenna tuning Sun Jan 31, 2021 7:24 pm
Alan Pilot wrote:
As above all 11m antenna's need tuning not hard to do but you will need a SWR metre.
Unfortunately not true at all , not all 11m antennas need tuning but ANY antenna / install needs checking with a SWR meter
Most 11m antennas come pre tuned and providing your coax and plugs are all in order then no tuning will be needed but I can’t stress enough how important it is to check everything out with a meter
Craig
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NUBSTER 10 + Year member
Call Sign : 26 CT050 26 FB080 26 WT105 26 TE171 Posts : 948 Times Thanked : 51 Join date : 2019-06-27 QTH or Location : NORTH LONDON Equipment Used : ORIGINAL President Lincoln, President Teddy , Silver Eagle microphones , Gainmaster antenna, use a AMP ofcourse I do sometimes Age : 66
Subject: Re: Antenna tuning Sun Jan 31, 2021 7:39 pm
Craig matey I can agree with 11m homebase antenna are 90% pre tune once put together but I haven't come across a mobile one where I haven't had to tune it ,that's what OP was asking about originallly ,mobile antennas in another thread which I was helping him with, but at least he knows that it's best to check anyway .
Alan Pilot Major contributor
Call Sign : 163-CT-220... Posts : 2632 Times Thanked : 70 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7610,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 16
Subject: Re: Antenna tuning Sun Jan 31, 2021 7:57 pm
I agree with you Craig but i think we all have the urge to adjust fine tune them. If you put a silver rod up what are the chances of a 1 to 1 swr. You check the swr and in most cases you will adjust it so tune it sort of I put a pre-tuned gainmaster up last year but wasn't happy with the swr so i altered it. Can't think of any aerial i have ever put up that was spot on first go first was a dv27 in the mid 70s and yes on a biscuit tin top of the stairs.
stephen Gunrunner Major contributor
Call Sign : 26CT526/MR021/M6XXX. Posts : 277 Times Thanked : 11 Join date : 2019-06-27 QTH or Location : wooler north northumberland or some were near it Equipment Used : mobile 4000hp base A99 radio base magnum257hp mobile magnum 257 standed power Age : 67
Subject: Re: Antenna tuning Wed Feb 03, 2021 2:13 pm
my sirio 4000 hp and 5000 performer in my try mag were checked from new and 1,2 and 1.3 so happy no cutting and happy they perform fantastically
Alan Pilot Major contributor
Call Sign : 163-CT-220... Posts : 2632 Times Thanked : 70 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7610,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 16
Subject: Re: Antenna tuning Wed Feb 03, 2021 2:55 pm
I must admit they seem to be a lot better today than they where back in the late 70s early 80s.
Northern Crusader Major contributor
Call Sign : M0GVZ / 26CT1760 Posts : 536 Times Thanked : 35 Join date : 2019-11-13 QTH or Location : IO94SA Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike Age : 54
Subject: Re: Antenna tuning Wed Feb 03, 2021 3:37 pm
stephen Gunrunner wrote:
my sirio 4000 hp and 5000 performer in my try mag were checked from new and 1,2 and 1.3 so happy no cutting and happy they perform fantastically
But put them on my car which has a hole in the roof mount and loads of bonding done and the SWR would be over 3 and they'd be resonant at 26MHz or slightly lower due to the much more efficient RF ground. I ended up having to cut 3 inches off mine to move it up ~ 1.5MHz to cover EU Ch1 to UK Ch40.
That's why you need to check the SWR when you install an antenna and not just assume they'll be OK out of the box because no two installations are the same.
Today at 9:47 am by VanRougeT4
Subject: Antenna tuning 
