Moderator: Section Moderators

Joined: November 8th, 2010, 2:36 pm

December 13th, 2010, 4:11 am #11

Cobra 148, I was also disappointed and the GM was slugish at first when I had it lower than 23' feet. When I got it up to about 28' feet it responded noticeably better. I also had my AstorPlane (a Sirio Top One) up at 40' feet to the hub, and it was only 35' feet away from the GM. I feel the GM was affected. You can check my three Signal Reports posted above and see where I changed the height of the GM relative to the AP...and the results of those changes.

After this comparison work I took the AP down and thus far I see from 0 to 1/2 an Sunit better signals, so I think the GM is very sensitive to stuff around the bottom choke area and maybe it was being ill-affected a bit by the AP being close. I would caution any user to be aware the GM needs to really be out in the clear and well above its surroundings.

The qualities I find amazing are the low noise level, the clear RX signals I hear, and I also hear reports that my audio clarity is improved on the GM. The GM is also very broadbanded too. As reported by others as well, I can sometimes copy traffic on the GM that I can only hear on the AP. I have my GM up by itself now, and for further comparisons I'll be testing with only one antenna on the same mast and coax. I'll miss being able to compare these qualities on the GM...when I can no longer just switch antennas using my switch box. This is a new approach in comparison work for me, but I think maybe it's better in the minds of most operators...to compare antennas on the same mount using the same coax.

Thus far I have no complaints of RFI/TVI, and my Field Strength Meter doesn't respond inside the shack, even at 100 watts, like it did with some other vertical antennas I own. I have high regards to the old AstroPlane, but IMO the Gain Master is a winner if it holds up to the wind and weather.
Ole' Grandpa South of Corpus Christi, Texas

I run an original Starduster @ 47' feet. If I can hear you, I can talk to you...if you're listening!

Quote
Like
Share

Joined: November 8th, 2010, 2:36 pm

December 13th, 2010, 4:48 am #12

Offplanet wrote:
wrote:showed the wife but she just looked at me like i was a weirdo....lol
That'd be right Mark - for some reason, they just don't get it!

Sounds like some amazing results with the Gain Master - Marconi's results with the Astroplane shows that that antenna is quite a performer too.
Thanks Offplanet for noticing that the Sirio Top One is also a good performer considering it only has a 4' foot top radiator and is only 12' feet tall. Most don't notice that distinction when looking at those reports, but that is why I was moving the GM around in height. You see that the TO outperforms the GM when the tips are at the same height, but that happens with all comaparisons I make. When the tips are at the same height...the shorter antenna with the highests relative feed point always shows the better signals.

Richy, if I understand your question correctly, yes the AP is an old Sirio Top One knockoff of the Avanti AstroPlane. The Signal Reports are random RX readings only. I do not talk antennas on the air with my bunch of old radio characters, because of the argumensts that are sure to ensue. So the reports are generally taken on a morning before the static rises and the traffic dies off. Reports from each station are taken at the same time using a switch box however and I only focus on one station at a time. These are all local contacts with milage between stations noted, no DX at all. When DX rolls, I stop recording signals. Variations from one report to another can be due to many reasons. Conditions, beams, amps, different radios, etc., and sometimes an operator doesn't show up or stops talking before I can monitor. I would like to get two-way info, but that would cause all kinds of greef with the bunch of old hard-headed, know it all's, I talk to.

Richy, if that doesn't answer your specific question, them ask-up with specifics.
Ole' Grandpa South of Corpus Christi, Texas

I run an original Starduster @ 47' feet. If I can hear you, I can talk to you...if you're listening!

Quote
Like
Share

Joined: September 24th, 2010, 9:41 pm

December 13th, 2010, 6:16 pm #13

hi there marconi many thanks for the reply. i was just curious as to what ap you had ! i just wondered if there would be any difference between the two types of ap antennas as i know the avanti was a straight through design and lets face it made better as well! and the new sirio has i believe a gamma match!! but just reading your last post i noticed you said an OLD sirio! i assume with no gamma match? many thanks 73s.
Quote
Like
Share

Joined: November 8th, 2010, 2:36 pm

December 13th, 2010, 7:48 pm #14

richy wrote:hi there marconi many thanks for the reply. i was just curious as to what ap you had ! i just wondered if there would be any difference between the two types of ap antennas as i know the avanti was a straight through design and lets face it made better as well! and the new sirio has i believe a gamma match!! but just reading your last post i noticed you said an OLD sirio! i assume with no gamma match? many thanks 73s.
Thanks Richy. I've only heard one report on Sirio's New Top One and that was posted on Copper's Forum, and we all know how promotional minded those guys are. Anyway, the report was stellar and the claim was...the NTOne was better and more broad banded than the original AstroPlane or the old Top One.

I was tempted to get one, but the new Gain Master came out and I am comparing it to my Top One as we speak. The GM is working great for me and I love how quiet it is on receive. I have posted three comparison reports, I call my Signal Reports, above and although the GM reports a better signal than the TO/AP when antennas are mounted at their base on the same or similar support, the TO/AP is still in my mind a top performer. You just have to get it up higher so the tip is close to as high as the competition and you'll see it work good then.

I just took my GM down after testing vs. the TO/AP and I have installed my A99 on the same pole, so I'm going to take some new local only signal reports and publish as soon as I record what I can. I've always had real good luck with my A99 that I found used in 1992, so I don't know yet how it will compare with the GM.

I'll keep you posted with my Signal Reports as I compare my GM, Imax, I-10K, Wolf .64, and my Antenna Specialists origninal Sigma4 with my local bunch of sideband operators.
Last edited by Marconi on December 13th, 2010, 7:52 pm, edited 1 time in total.
Ole' Grandpa South of Corpus Christi, Texas

I run an original Starduster @ 47' feet. If I can hear you, I can talk to you...if you're listening!

Quote
Like
Share

Deleted User
Deleted User

December 13th, 2010, 10:47 pm #15

Marconi wrote:
richy wrote:hi there marconi many thanks for the reply. i was just curious as to what ap you had ! i just wondered if there would be any difference between the two types of ap antennas as i know the avanti was a straight through design and lets face it made better as well! and the new sirio has i believe a gamma match!! but just reading your last post i noticed you said an OLD sirio! i assume with no gamma match? many thanks 73s.
Thanks Richy. I've only heard one report on Sirio's New Top One and that was posted on Copper's Forum, and we all know how promotional minded those guys are. Anyway, the report was stellar and the claim was...the NTOne was better and more broad banded than the original AstroPlane or the old Top One.

I was tempted to get one, but the new Gain Master came out and I am comparing it to my Top One as we speak. The GM is working great for me and I love how quiet it is on receive. I have posted three comparison reports, I call my Signal Reports, above and although the GM reports a better signal than the TO/AP when antennas are mounted at their base on the same or similar support, the TO/AP is still in my mind a top performer. You just have to get it up higher so the tip is close to as high as the competition and you'll see it work good then.

I just took my GM down after testing vs. the TO/AP and I have installed my A99 on the same pole, so I'm going to take some new local only signal reports and publish as soon as I record what I can. I've always had real good luck with my A99 that I found used in 1992, so I don't know yet how it will compare with the GM.

I'll keep you posted with my Signal Reports as I compare my GM, Imax, I-10K, Wolf .64, and my Antenna Specialists origninal Sigma4 with my local bunch of sideband operators.
Well done Marconi.......it's nice to see you guys spending the time testing the Gain Master. I'm real glad others are finding the same as I did. I know The Wizard and a few others in Europe tried it at the same time as me. But I posted what I found at my QTH.......some were Cynical of my findings (not on CT or WWRF I may add). But I'm sure now the truth is emerging from a number of sources Sirio will sell them like hot cakes. I see Thunderpole in the UK have got their price below £130 for it too.....10/10 for that as well. I feel as they sell more....they may hit the £100 mark here in the UK. ;)
Quote
Share

Deleted User
Deleted User

December 14th, 2010, 11:45 am #16

I was with a man yesterday and we tested the antenna v a Sirio Vector 4000. The Vector was on a 3m pole and the Gain Master was on another 3m pole some 90ft apart. Using Airflex cable and exactly the same run of coax. Tested with 50w from a Yaesu FT897D on FM 27.385mHZ and the Gain Master was 1 1/2 S points up on the Vector..

BUT......................

Vector on a 6m Mast and with the Sirio on the same mast and NOT touched the Vector was winning by 1s point

SSB

Same radio, same power and antennas on the same 3m mast the GM was again 1s point at least up and quieter on the rx side of things

Was -15c @800m when we made the tests. I need wait any links as was not my test and was being done for an Austrian Shop, so seems there is a difference but you can also mitigate it with some other circumstances :doh:
Last edited by Guest on December 14th, 2010, 11:45 am, edited 1 time in total.
Quote
Share

Deleted User
Deleted User

December 14th, 2010, 1:37 pm #17

This writing below was lifted from another forum: But it answers another 827 v GM antenna test. So if am allowed to post it then here it is, and if not then please PM me and will send you a link to the place it was mentioned:
From another Forum wrote:hi all
well havent had alot of time on the radio with my gainmaster but what time i have had been getting great reports ive had breakers 45miles away sayin ive gone up 2-2.5 s points!!!!!!!!!!!!!!! even some stations say they can now hear me and couldnt with my 827!!! so all in all WOW! very happy will give it a good test over the next couple weeks as i got some time off over christmas and there are alot of dx events happen ing on diff modes!

for info purposes the gainmaster is on the same poles exactley the same height in the same location on the same coax with a slightly lower swr!overall (many happy smilies)
Last edited by Deleted User on December 14th, 2010, 2:43 pm, edited 1 time in total.
Quote
Share

Deleted User
Deleted User

December 14th, 2010, 1:52 pm #18

In this photo for Marconi is the replacement bits from 2x GM insides. This is the cable that runs down the inside of the antenna from around the area of the join mid-way down. GM Owners know where I mean.

This is the new revised piece without the rubber and the NEW NEW revised piece from the last GM here that shows the last revision
EDIT - Picture resized and inserted into Post
resized1.jpg
Last edited by VoG on December 14th, 2010, 2:48 pm, edited 2 times in total.
Quote
Share

Deleted User
Deleted User

December 14th, 2010, 2:55 pm #19

Well Ladies and Gentlemen.

President Harry III
RM KL203
Sirio Gain Master


Another Inside is Burned and Antenna Broken, Not even with high power or nothing. Have emailed Sirio as not sure what is happening here. I was bla bla bla away, then smelled amplifier had issues and turned it off. Check SWR and was bust to buggery.. Took apart and there is powder black inside and the piece is burned and smells bad. Amplifier now bust as tx with no antenna basically and the Harry Shows little output too now. So, KL203 now killed off my antenna, and this was with the modified (without rubber coated) ending.
EDIT - Picture resized and inserted into Post
resized2.jpg
Last edited by VoG on December 14th, 2010, 3:17 pm, edited 2 times in total.
Quote
Share

Joined: November 8th, 2010, 2:36 pm

December 14th, 2010, 7:23 pm #20

Simon see if I understand this just to be sure, OK?
resized3.jpg
Gain_Master_new_pig_tail_repair.jpg
Last edited by Marconi on December 14th, 2010, 10:51 pm, edited 4 times in total.
Ole' Grandpa South of Corpus Christi, Texas

I run an original Starduster @ 47' feet. If I can hear you, I can talk to you...if you're listening!

Quote
Like
Share