sirio gpe 27 5/8 wave antenna ,how to tune help needed

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WARLOCK
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sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by WARLOCK » 21 Oct 2018, 09:48

i am fed up with fibreglass antennas so i am going to try a sirio gpe27 5/8 wave with ground planes ,is there anyone out there that can tell me how to adjust the top section ( how much to leave out ) i mainly use 27.555 ,

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by ch25 » 21 Oct 2018, 10:32

Measure SWR, that you will know if antenna is too long or too short.
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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by WARLOCK » 21 Oct 2018, 10:46

hi chris, as its such a bloody job to put the antenna up and down , ( not much room ) i was hopping someone could help me out and tell me how much of the top section to leave out heres hopping ??? what coax should i use it needs to be 40 ft would mini 8 be any good ???

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by ch25 » 21 Oct 2018, 10:57

You can tune antenna in a free space, than put on it's place.
If no obstacles in proximity and not too close to the ground it gonna work.
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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by gmham » 21 Oct 2018, 15:29

As someone who uses this very antenna would personally say give it a miss unless you have already bought one ? For the money the are a bargain,work well are very sturdy but despite generous waterproofing on my part the swr is up and down daily even with no rain !! This is similar to the finding off a few others I have spoke to and funny enough is mentioned within the couple off reviews on eham.net.

If going ahead the only advice I can give is totally weatherproof every single joint and this will help the little screws working loose . Swr wise.. for me the swr guide supplied with it was totally out. I spent a few hours up and down the ladder adjusting the swr to get it down to 1.5 on 28.300mhz and then its either steady at this or way up depending on how it felt that particular day !!

Sirio 827 is raved about and if you can get one then personally would get one over the gpe27 5/8 wave . It's next on my ever increasing buying list !!
.... Icom IC7300 HF /6 mtr
Kenwood TR751e 2mtr ssb






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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by WARLOCK » 22 Oct 2018, 08:51

AS i do not have the space for a sirio827 and the bad report on the sirio gpe27 do anyone think i should go back to a imax 2000 maybe.???

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by gmham » 22 Oct 2018, 10:22

In all honesty as good as they are personally would keep the imax2k. There are others that are well happy with the sirio and as I say for the money they are a good buy but from personal experience off using one would give it a miss if you can't easily access the re-tuning off it every other day !!
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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by 108EH002 » 23 Oct 2018, 18:50

WARLOCK wrote:
21 Oct 2018, 09:48
i am fed up with fibreglass antennas so i am going to try a sirio gpe27 5/8 wave with ground planes ,is there anyone out there that can tell me how to adjust the top section ( how much to leave out ) i mainly use 27.555 ,
You say you are "fed up with fibreglass antennas" but don't give an explanation of your fed-up-ness,I have used a S.g.m,827 in the past,and at present an Imax,I am far from fed up with my Imax,just saying.
You can talk worldwide on CB not 10 - 15 miles,
some are too far up their own @rse to admit it = snobs.

27.781.25 Fm
27.555 Usb
27.385 Lsb
27.315 Fm
27.275 Usb
27.025 Am

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by WARLOCK » 23 Oct 2018, 20:43

When i said i was fed up with fibreglass ,I was fed up with my antenna a gainmaster meaning i felt i was ready for a change ,I still feel i need a change but have been put off the sirio gpe27 because of the reports of swr problems so WAIT for it i am going to give a imax 2000 antenna another go ?????

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by Mudslinger » 24 Oct 2018, 17:44

I found the GPE 27 to be a great antenna, but you do need to put PVC tape over the jointing sleeves.

In the instructions there is a SWR chart for setting the length of the top section.

We installed four of these antennas locally and every time the SWR was correct if set according to the chart.
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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by 108EH002 » 24 Oct 2018, 18:16

Did any of the 4 gpe's swr change,when it started to rain Simon ?
You can talk worldwide on CB not 10 - 15 miles,
some are too far up their own @rse to admit it = snobs.

27.781.25 Fm
27.555 Usb
27.385 Lsb
27.315 Fm
27.275 Usb
27.025 Am

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by Mudslinger » 26 Oct 2018, 09:53

No problems at all.
Mudslinger - Simon
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There is no such thing as a Fidelity 1000 which is too good to scrap.

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liamhere
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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by liamhere » 26 Oct 2018, 10:43

mine is great.....SWR never moves
26-TM-928
26-CT-928
26-FB-928
26-DR-928

Alinco DR-135UK
Sirio GPE 27 5/8

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by Mudslinger » 26 Oct 2018, 19:33

I just took mine down after 4 years in the air due to me going QRT for a while. No evidence of water ingress. But the plastic rivet things which hold the black insulator part to the pole clamp have gone brittle and broken. It looks to be an easy repair if they are drilled and M8 nylon bolts put through.
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There is no such thing as a Fidelity 1000 which is too good to scrap.

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Re: sirio gpe 27 5/8 wave antenna ,how to tune help needed

Post by 108EH002 » 27 Oct 2018, 11:24

Mudslinger wrote:
26 Oct 2018, 09:53
No problems at all.
Ok cheers.
You can talk worldwide on CB not 10 - 15 miles,
some are too far up their own @rse to admit it = snobs.

27.781.25 Fm
27.555 Usb
27.385 Lsb
27.315 Fm
27.275 Usb
27.025 Am

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