| Stereo Tool https://forums.stereotool.com/ |
|
| Mpx cable maximum length https://forums.stereotool.com/viewtopic.php?t=5691 |
Page 2 of 2 |
| Author: | bumm [ Sat Oct 18, 2014 6:22 am ] |
| Post subject: | Re: Mpx cable maximum length |
ahh this is good alternative...i can try this option...Very thanks.. |
|
| Author: | weskeene [ Sat Oct 18, 2014 3:41 pm ] |
| Post subject: | Re: Mpx cable maximum length |
But keep in mind any extra heliax will reduce power input to the antenna because of line loss. So you'll want to look up the specific cable you're using to carry the RF, figure out its line loss, and up your TPO precisely to compensate. |
|
| Author: | bumm [ Sat Oct 18, 2014 3:57 pm ] |
| Post subject: | Re: Mpx cable maximum length |
Of course !, talking to a local technician recommended I use the rg59, another technician recommended me utp cat6. you think? |
|
| Author: | oldiesstation [ Sat Oct 18, 2014 7:04 pm ] |
| Post subject: | Re: Mpx cable maximum length |
cat 6 should work, what about a fiber link? |
|
| Author: | Bojcha [ Sat Oct 18, 2014 7:24 pm ] |
| Post subject: | Re: Mpx cable maximum length |
RG213 or CFD400 |
|
| Author: | bumm [ Sun Oct 19, 2014 4:25 am ] |
| Post subject: | Re: Mpx cable maximum length |
who think of using a balun utp like these? http://www.amazon.com/gp/aw/d/B007XUU6E ... 15&simLd=1 |
|
| Author: | Clipper [ Sun Oct 19, 2014 3:43 pm ] |
| Post subject: | Re: Mpx cable maximum length |
From my perspective I still think your best choice is to move the exciter to the PC, use a long length of good heliax from the exciter to the power amp stages and adjust the exciter to compensate for the loss in the 50 metre run of heliax. Though 50 metres of decent heliax is going to cost you hundreds of dollars. Maybe a cheaper option is to run your program signal (+4 balanced) to the computer for 50 meters and then a very short cable from the computer to the MPX input of your exciter. Costs you 100 metres (50 Left, 50 Right) of decent co-ax about $150. |
|
| Author: | bumm [ Sun Oct 19, 2014 4:01 pm ] |
| Post subject: | Re: Mpx cable maximum length |
my problem is this: my driver can not be separated from the transmitter, and the computer is a 30, 35 meters. computer is used to air can not put it next to the transmitter. so my question is: can be balanced with balun and unbalance on the other end? |
|
| Author: | Clipper [ Sun Oct 19, 2014 5:38 pm ] |
| Post subject: | Re: Mpx cable maximum length |
You could try the balun but I think you may find the stereo separation suffers. It is something you'd have to try to see what the results are. Maybe put a signal into one of them and look at the result on the other end. At a guess I would say the transformers in those baluns are 75 ohms to 110 ohms (75:110). The CAT 6 would give you about 25ns delay skew for 30 to 35 metres and probably about 1 degree phase error at MPX frequency. It's worth a try if you've got a pair of those baluns on hand. C. |
|
| Author: | bob53bob [ Fri Oct 24, 2014 1:00 am ] |
| Post subject: | Re: Mpx cable maximum length |
Using coax between the exciter and transmitter will only cause reduced power if the exciter is running at full power now. Most exciters operate at lower than maximum power....say a 50 watt exciter runs at 30 watts. If you lose 2 watts in the longer coax, turn the exciter power up by 2 watts to compensate. It's very unlikely for power loss to be a significant problem. Run this by your RF transmitter guy to confirm it first, then move the exciter to where the ST computer is located. End of story. |
|
| Page 2 of 2 | All times are UTC+02:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|