[App_rpt-users] wire length...

[Doug Bade]

I had a 33 ft usb cable for one of the repeaters at the site.. it ( the USB
dongle .. a USB URI )  crashed on occasion so I made it shorter and it
stopped crashing. They do manufacture usb cables with booster amplifiers in
them, to increase length range beyond 16 feet. In this case, length it is
more about signal losses, than timing.... 

Doug
KD8B  






-----Original Message-----
From: app_rpt-users-bounces at ohnosec.org
[mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Jon Rorke
Sent: Monday, December 05, 2011 8:48 AM
To: 'app_rpt mailing list'
Subject: Re: [App_rpt-users] wire length...

I just extend the wiring from the radio to the fob/URI. I use 8 cond. 
18AWG shielded cable. My cables are ~20 feet long to get from a wall rack to
the radio rack.

Jon

On 12/4/2011 11:04 PM, Scott Weis wrote:
> The spec for USB is 16 feet max.  I have used a USB to cat 5 extender 
> and extended over 100 feet and the URI worked fine.
>
> -----Original Message-----
> From: app_rpt-users-bounces at ohnosec.org 
> [mailto:app_rpt-users-bounces at ohnosec.org] On Behalf Of Bryan D. Boyle
> Sent: Sunday, December 04, 2011 9:24 PM
> To: app_rpt mailing list
> Subject: [App_rpt-users] wire length...
>
> wondering...there's a legitimate length restriction on USB 
> cables...but, from the dongle to the radio...the audio and control
signals...analog...
>
> Reason for asking...have my asterisk computer in the spare basement 
> room here...right next to the radios.  All the nice dongles blinking 
> in unison..but...thinking (I know...dangerous) it would be nicer to 
> actually have the computer in the same room as the rest of the shack, 
> and the radios out in the other room so the fans on the power supply don't
intrude, etc.
> And be able to sit at my work area, rather than standing in front of 
> the rack...when I'm hacking at the configuration files, or...???
>
> so...thoughts about how long the cables from the dongle to the radio 
> itself could be before running into trouble?
>
> Not thinking of using JK (the old Bell 2-pair station wire, believe it 
> or not, have a couple boxes left from the 80s...:)) or UTP...but, have 
> a nice spool of belden 8451 (2 stranded conductor, shielded) that's 
> used almost as a given in most commercial radio stations etc and we 
> never had a problem with l-r phase shift or degradation (and this was 
> running audio signals in a transmitter room with 25KW boxes and STLs, and
the like floating around...).
> *shouldn't be a problem, right?*
>
> Just thinking out loud...I know, try it and see.
>
> BB
>
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