| Author |
Message |
    
Sinker
Intermediate Member
Username: Sinker
Post Number: 307
Registered: 8-2005
| | Posted on Thursday, December 15, 2005 - 5:39 pm: | 
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OK. my new coax should soon arrive, I will probably miss this weeks net but hope to be up for the following one.
I am installing ALL BRAND NEW coax from Antenna to Polyphasers, Polyphasers to the shack and all new jumpers.
I will also re-check the SWR and make any adjustments necessary. Everything is still very well grounded as in every last piece of equipment to include switches. I am also replacing the covered #4 ground wire with bare due to an early topic.
What else can I do ???
Do I need to be concerned about the SWR reading between the radio and the amp when the amp is ON as it always seems to jump higher ???
Hope to be talking to you all again soon and on a station that is dead nuts on - Hoping anyway...
Tim
CEF-634 |
Cornbrown
Member
Username: Cornbrown
Post Number: 93
Registered: 7-2005
| | Posted on Thursday, December 15, 2005 - 8:24 pm: |
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Quote...
"Do I need to be concerned about the SWR reading between the radio and the amp when the amp is ON as it always seems to jump higher ??? "
Yes.. I would keep the SWR between the radio and amp low... I try different lengths of coax to get the SWR low going into the amp ..
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Kid_vicious
Advanced Member
Username: Kid_vicious
Post Number: 941
Registered: 9-2004
| | Posted on Thursday, December 15, 2005 - 9:02 pm: |
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cornbrown is right tim.
use a radio that has a built in SWR meter.
start with a 12 foot jumper from radio to amp.
amp should be on and on hi, ready to transmit.
key up with mic gain down, calibrate meter on ch.20
and check the SWR.
is it lower than 1.5 to 1?
if so, you can choose to leave it or try to perfect it further.
is it higher than 1.5 to 1?
if so, cut three feet off the 12 foot jumper so that it's 9 feet long and repeat the process.
is it lower than 1.5 to 1?
if so, great!
if not, keep cutting 1 foot off of the jumper, recalibrating the internal SWR meter each time.
most have found that 8.5 to 9 feet works the best, but your results may vary.
hope to hear you on the air soon!
matt |
Wildrat
Intermediate Member
Username: Wildrat
Post Number: 490
Registered: 12-2003
| | Posted on Thursday, December 15, 2005 - 10:18 pm: |
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You telling me my 3 foot jumper is going to be a problem. You know before I came here I never worried about how long my jumpers were. I usually kept them in multiples of 3. I made them long enough to get to the equipment, not too long, not to short. Then there are my 1 foot jumpers. I never had problems. Now since reading these post I start doubting what I'm doing. I guess that I will more than likely do what I've always done and use the Jo Gunn gain method of determining jumper length. I don't know who Jo Gunn is but he must be pretty sharp from the post I read. as spread out as my equip. is I can still connect everything with 3 foot jumpers, except my paint can in a bucket. It'll most likelybe 9 foot. Oh well, Sinker has been on the air, off the air more than anyone I know. I have not even got my junk up and running yet. I have my Jeep though, she can talk. Well I'm going to turn around and solder this jumper I've been working on all day.
WildRat |
Sinker
Intermediate Member
Username: Sinker
Post Number: 309
Registered: 8-2005
| | Posted on Friday, December 16, 2005 - 10:13 am: |
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Oh well, Sinker has been on the air, off the air more than anyone I know.
Well now my feelings are hurt. It's terrible being so thin skinned.
Seriously though, yeah it has been a ride and I have learned a lot with much more to come I am sure.
I will be back on the air and talking to you all again before to long I hope. If I do the beam I might even be able to get ahold of Starface and you Wildrat.
Need a few more items and some good weather to get things finished up and of course the all to allusive TIME.
Tim
CEF-634 |
Wildrat
Intermediate Member
Username: Wildrat
Post Number: 497
Registered: 12-2003
| | Posted on Friday, December 16, 2005 - 11:48 am: |
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That was not meant as a crack on you Sinker, I'm talking about me, I haven't had a station since last year and I have all the stuff to do it. You know a lot more than maybe you think. Not being able to speak the language doesn't mean you don't know it.
Wildrat |
Road_warrior
Senior Member
Username: Road_warrior
Post Number: 1059
Registered: 7-2004
| | Posted on Friday, December 16, 2005 - 11:55 am: |
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Wildrat,
When i used jumpers, i used 3 ft and never
had a problem with SWRs in my home or vehicle.
SWRs barely move for me in either location.
Get antenna to it's lowest SWR possible. |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 503
Registered: 12-2003
| | Posted on Friday, December 16, 2005 - 4:50 pm: |
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I've already got my three's made, I was going to use them anyway. I'm told that if you have to use different lengths of jumpers to adjust your SWR you have problems else where, like amp/radio matching not right, poor grounding and some other techie stuff. I did finally get my RG213 jumper made for the paint can in a bucket. I took some pictures. I'll post later.
See Ya'll
Wildrat |
Sinker
Intermediate Member
Username: Sinker
Post Number: 310
Registered: 8-2005
| | Posted on Friday, December 16, 2005 - 6:31 pm: |
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The thing about being thin skinned was a joke there Wildrat. My feelings are far from hurt. Just anxious to get back on the air myself but like you NO SHORTCUTS.
BTW - you are right and that is OK as I have learned some good stuff. I could be back on the air right now if I really wanted but after being on the Maco V-5000 I do not want to go back to the A-99, nor do I want to use marginal or questionable coax. So I like you am waiting for when I turn it on - I TURN IT ON, seems some of my stuff is in Chicago of all places go figure heheehe
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Wildrat
Advanced Member
Username: Wildrat
Post Number: 505
Registered: 12-2003
| | Posted on Friday, December 16, 2005 - 7:03 pm: |
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I hope that I will be surprised Christmas with MFJ 6 position Antena/Transceiver Switch. I have been dropping plenty of hints, plus justification. I told my wife she might as well get it for me since I will be getting it anyway. Then she says I thought when we to the Mudhole and you got your rod blank and guides that was going to be your Christmas , I said no that was my birthday, which is just a few days after Christmas. Oh well,think I'll turn around and tinker a bit.
Wildrat |
Sinker
Intermediate Member
Username: Sinker
Post Number: 310
Registered: 8-2005
| | Posted on Friday, December 16, 2005 - 7:18 pm: |
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heheehe - still have not been to MudHole since I moved here. Going to have to make that trip one of these days. Spend to much time and money at Bass Pro Shops that's for sure.
Looked like you had a lot of nice equipment in your shack already. Can't wait to hear you on the air. |
Vanillagorilla
Intermediate Member
Username: Vanillagorilla
Post Number: 380
Registered: 4-2005
| | Posted on Friday, December 16, 2005 - 7:18 pm: |
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I do not want to go back to the A-99, nor do I want to use marginal or questionable coax.
NOW "MY" FEELINGS ARE HURT! |
Sinker
Intermediate Member
Username: Sinker
Post Number: 312
Registered: 8-2005
| | Posted on Saturday, December 17, 2005 - 12:07 pm: |
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Yeah but then mine are hurt cause I don't have any cool hand made lures - so guess were even.
The A-99 is good just not as good as my Maco V-5000 IMHO that is. As for the coax not sure if it is any good as it was the stuff I had in line went hit by the lightening. I cut it down a few feet and no more burn look but someone said that the coax was probably still shot so do not want to take any chances ya know.
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Wildrat
Advanced Member
Username: Wildrat
Post Number: 508
Registered: 12-2003
| | Posted on Sunday, December 18, 2005 - 2:59 am: |
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Don't get rid of it,Bring iy overhere,I'll take care of it.
Wildrat |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 139
Registered: 3-2005
| | Posted on Friday, January 06, 2006 - 12:29 am: |
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Frist if your amp is working right SWR will be ok
This is a base so i think its a tube unit.The SWR
is the same on or off if not you have a mismach.
the facts |
Rldrake
Junior Member
Username: Rldrake
Post Number: 25
Registered: 1-2006
| | Posted on Tuesday, January 17, 2006 - 12:45 pm: |
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Al lafon, Thanks for posting "the facts" link. The basic information there is very, very good. It is written in very easy to understand terminology. This is good reading for all ! Now if everyone would just give it a read, much of all the old wive's tales, myths, and over obsessions and worry over supposedly high swr (not swr's) can be put to rest. Congratulations and thank you again for posting the link to such basic and fundamental, although so highly misunderstood, information. There are a few minor errors in the article, however...but it was written to only dispell a few common CB myths with some actual fact. It was a little bit in error on a few points...but about had to be or it would be leading alot of readers into even more confusion on the subject. |
