| Author |
Message |
    
Radioreddz
Intermediate Member
Username: Radioreddz
Post Number: 133
Registered: 9-2006
| | Posted on Tuesday, October 29, 2013 - 5:55 pm: | 
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I want to move my band width higher to get a better SWR into 10 meters do I turn the rings towards the bottom or do I turn them up towards the top. |
Tech833
Moderator
Username: Tech833
Post Number: 2274
Registered: 8-2002
| | Posted on Wednesday, October 30, 2013 - 2:08 am: |
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Toward the top.
Your radio 'Mythbuster' since 1998
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Dale
Senior Member
Username: Dale
Post Number: 1988
Registered: 12-2002
| | Posted on Wednesday, October 30, 2013 - 12:55 pm: |
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i maybe wrong but dont those rings tune the same way a mobile antenna tunes.if so then you,d go
down with the rings for 28mhz
and go up for 26 mhz
i know this is how mobile antennas work ,i thought the a99/imax rings worked the same
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
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Tech833
Moderator
Username: Tech833
Post Number: 2275
Registered: 8-2002
| | Posted on Thursday, October 31, 2013 - 12:17 am: |
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Nope, the opposite.
Your radio 'Mythbuster' since 1998
|
Radioreddz
Intermediate Member
Username: Radioreddz
Post Number: 134
Registered: 9-2006
| | Posted on Wednesday, October 30, 2013 - 8:21 pm: |
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so going to the top would actually shorten the antenna which would be the same as a mobile antenna and making the stinger shorter. I just want the part of the 10 meter band up to 28495 that seems to be where the band is more lively when open. I hear a lot of guys talk about cutting the top of the A99 I'm hopping I can get close with just the ring adjustment. |
Tech833
Moderator
Username: Tech833
Post Number: 2276
Registered: 8-2002
| | Posted on Thursday, October 31, 2013 - 12:19 am: |
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There's nothing wrong with cutting the top of the A99 to tune it into the 10m band. I ended up cutting close to 12 inches off the top of one and it covers the whole 10m band under 1.2:1 now. It's about 1.7:1 on the CB band.
Your radio 'Mythbuster' since 1998
|
Dale
Senior Member
Username: Dale
Post Number: 1989
Registered: 12-2002
| | Posted on Thursday, October 31, 2013 - 3:58 pm: |
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thank you tech 833.. learn new stuff every day
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
|
Dale
Senior Member
Username: Dale
Post Number: 1990
Registered: 12-2002
| | Posted on Thursday, October 31, 2013 - 4:01 pm: |
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and i agree with tech 833 about cutting it.
however once ya cut it thats it,cant be put
back on. i would use the tuning rings first.
then if there maxed out and swr is still not
where it needs to be then start cutting. but id
only cut 1/8-1/4 inch max at a time
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
|
Tech237
Moderator
Username: Tech237
Post Number: 1709
Registered: 4-2004
| | Posted on Thursday, October 31, 2013 - 11:22 pm: |
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Took 6 inches off mine and had 15_10m
Tech237
N7AUS
God made me an athiest, who are you to question his wisdom?
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Tech833
Moderator
Username: Tech833
Post Number: 2277
Registered: 8-2002
| | Posted on Sunday, November 03, 2013 - 11:43 am: |
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Dale- Valid point. Keep in mind that the A99 has a very wide bandwidth, so if you run the rings all the way up, then begin cutting and accidentally go "too far", you can always run the rings back down to regain lower resonance.
Also, there is no magic to the A99 top section, one could easily replace it with a stainless whip (cut to length of course) or a cut down Firestik mobile antenna, or whatever. You should have no fear about trimming an A99 top section.
Your radio 'Mythbuster' since 1998
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Dale
Senior Member
Username: Dale
Post Number: 1994
Registered: 12-2002
| | Posted on Thursday, November 07, 2013 - 4:18 pm: |
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right on tech 833, you must have read my mind
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
|
Starface
Senior Member
Username: Starface
Post Number: 3269
Registered: 1-2005
| | Posted on Friday, November 08, 2013 - 5:10 am: |
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Or you could buy the GPK and have a replacement with 3 spares. As they are the same as the top section. Just a thought.
George
KI4NBE
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Tech833
Moderator
Username: Tech833
Post Number: 2278
Registered: 8-2002
| | Posted on Saturday, November 09, 2013 - 11:58 am: |
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Great point, George!
Your radio 'Mythbuster' since 1998
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