Batboard

I have a problem, thanks for listening.
We have an MSF 5000 repeater that was working with a Spectra-TAC
voter system which went bad. We are interfacing a Doug Hall voter
system with the MSF 5000 and have reached a stopping point. The new voter has been modified with a tone control board so that it creates all the control tones for the MSF 5000 line input in place of the old Spectra-Tac. It works fine BUT... Local audio from the repeater comes out line 2 and has the 2175 tone on it. When the voter uses external audio from a link radio, it keys the 5000 and the audio goes through like a champ. but when the audio is local from the repeater, the local receiver drops the 2175 tone but will pass no audio to the voter while the transmitter is keyed. When I remove the local receivers input (from my service monitor or a radio on the input frequency), the 2175 returns and everyting seems fine. If I remove the voter from line 1, the 5000 works like a regular repeater and passes local audio just fine.

I am sure this is proobably a setting in the software but I just need help in finding it to keep the local audio from muting during receive.

Thanks in advance for any help, I've got to get this fixed quickly.

Jeff
WB4WXD

Every time I read your post, I wonder to myself which Model MSF5K you have C_ _CLB or a C_ _CXB7106_T? You never indicated how the Spectra-TAC T1786B comparator failed ... Surge or otherwise. Perhaps a Surge got it, then possibly that also hit your MSF5K too.

On the other hand, you could have your station's TRC board set up for 2 Wire Half Duplex rather than 4 Wire Full Duplex on the Wire Line (Yellow Berg Jumpers) which it should be.

I would take a scope probe connected to your service monitor, looking for either unsquelched audio noise or recovered 1 kHz audio tone from the station's receiver Wire Line terminals.

Dan
Thanks for the reply. We are going down and check out both items you suggest and as the site is bout 40 miles away it takes a while to get there.
I am going to try and read the parameters out of the 5K and save them. We are kind of coming into this project with no previous experience with this unit. I was wondering if any of the Spectra-TAC settings in the programming (delay, etc) might have been changed/need to be changed.
Thanks for everybody's thoughts.

Jeff

Thanks to all for your help, the problem turned out to be a setting that
somehow changed in the programming. The repeater was not set to
full duplex mode and thus shut off the local receiver when the repeater
keyed. We're at a loss why the setting changed, but happy that it was corrected

Thanks
Jeff

My two bits worth:
Why not repair the Spectra-Tac comparator?