| Author |
Message |
    
Boxcar
| | Posted on Sunday, March 09, 2003 - 10:14 pm: | 
|
Just wanted to see if anyone knew what kind of coax that's RG62 can be used on? I stumbled on quite a bit the other day and wanted to know if this was the same kind that you could use on scanner use or is it the same kind for cable and/or satellite use? Thanks!!! |
Bigbob
| | Posted on Monday, March 10, 2003 - 12:01 am: |
|
Cable/satelite. |
Kc0gxz
| | Posted on Monday, March 10, 2003 - 2:19 am: |
|
I wouldn't use it for any transmitter purposes because of it's high impedence but it should work ok for a receiving antenna such as a scanner. If i'm wrong, someone please correct me. |
Boxcar
| | Posted on Monday, March 10, 2003 - 6:15 am: |
|
Thanks!!!!!!!!!!! |
bruce
| | Posted on Monday, March 10, 2003 - 8:50 am: |
|
its 93 ohm coax |
Crafter
| | Posted on Monday, March 10, 2003 - 12:35 pm: |
|
Low loss good for a scanner. |
ryan
| | Posted on Monday, March 10, 2003 - 1:48 pm: |
|
if its 93 ohm, wouldnt it work better for co-phase than say 75 ohm? |
Simon
| | Posted on Tuesday, March 11, 2003 - 10:03 am: |
|
KC0GXZ,
Actually youCAN use for transmitting with a lowloss and an SWR that shouldnt exceed 1.5:1 IF EVERYTHING else is done right.Ive been using alength ofiton 2m for 4 years now and no problems -other than fitting a PL259 canbe a tad harder. |
Kc0gxz
| | Posted on Tuesday, March 11, 2003 - 2:42 pm: |
|
Hey Simon.
I'm curious to know if you experimented with different lengths to get your end results of 1.5. And what effect did it have, if any, on your antenna as far as broad-banding is concerned?
Jeff, kc0gxz. |
Stepchild
| | Posted on Tuesday, March 11, 2003 - 4:02 pm: |
|
How do you check ohms on coax and antennas?I've got an A99 that the bottom section has no contact between the center conducter and the top.I bet it's time for a new one,it's a '84 model,Thanks Stepchild |
Bigbob
| | Posted on Tuesday, March 11, 2003 - 7:55 pm: |
|
Stepchild,it's supposed to be that way,capacitively-coupled for your protection,in case the top section falls on high-tension lines.Dead short at center pin and bottom metal sleave,complete open between center pin and metal bushing at top of bottom section,aok!As long as your swr is 1.5 to 1 or below you're in business. |
Stepchild
| | Posted on Tuesday, March 11, 2003 - 10:34 pm: |
|
Bigbob,That's it they are extreamly high.I don't understand what happened,one day it worked and I took it down and put it back up 2wks later,this.I changed coax,tried to set swr with the rings,nothing changed.Like I said,it may be just old and something came loose on the inside.By the way how do you check ohms on coax,antennas and such?I really don't know how. |
Simon
| | Posted on Wednesday, March 12, 2003 - 9:39 am: |
|
No experiments were done -Just used a length I had left over after installing a Sat Tv system. First used aswe were short a length of coax for Field Day. SWR on that antenna (2m halo) was checked using anMFJ antenna analyser. Ive used it athome since.Length was around 60ft(guestimated). |
Bigbob
| | Posted on Wednesday, March 12, 2003 - 10:29 pm: |
|
You don't really if you have any resistance it's due to water or corrosion in the coax,the 50 ohms is the impedence the coax,antenna or accessorys offer to the rf.The output of your radio is tuned to 50 ohms of impedence,but your coax should show zero resistance pin to pin,barrel to barrel,complete open pin to barrel. |
|
