Syntor X control head jumpers
Posted: Fri Jun 29, 2018 12:27 am
Hi Guys,
I am trying to revive an old Syntor X radio with using old factory cables and control head. I have bought these stuff on Ebay a few years ago. All of these came from different sources, so I had to reconfigure the pins in the control head cable.
The control head now acts as a basic Systems 90 cable for 8 channels, with no scanning (http://www.onfreq.com/syntorx/syntorx/csys90bas32x.html).
The radio itself is a VHF high-band type, Model number is: T74VXJ7D04BK.
The control head housing is HLN4008, inside there are two boards: TRN4344A and a TR4395B. It is a non-scanning, basic 8 channel Systems 90 head.
When I connect all these stuff together, the control head lights up, I am able to change channels, I can control the volume and the squelch. The radio can TX and RX, everything seems fine, except one thing:
On some channels I can hear a loud buzzing from the speaker. The buzzing quits only when I unplug the purple connector (this has the channel selector wires). At this state the radio selects Mode 1 by default. The radio can TX and RX on Mode 1 and there is no buzzing from the speaker.
With the purple connector still unplugged: when I manually short the Mode pins on the J1 connector manually, the radio switches channels and receives/transmits on those without any issue and withput buzzing.
I assume that the TRN4344A board's jumpers are not configurated properly, and this is why the head acts strange.
Unfortunately I didn't find any information regarding the so-called clamshell type or the Systems 90 type heads' jumper settings.
Can comeone point me to the right direction or send the manuals needed?
Thank you in advance.
I am trying to revive an old Syntor X radio with using old factory cables and control head. I have bought these stuff on Ebay a few years ago. All of these came from different sources, so I had to reconfigure the pins in the control head cable.
The control head now acts as a basic Systems 90 cable for 8 channels, with no scanning (http://www.onfreq.com/syntorx/syntorx/csys90bas32x.html).
The radio itself is a VHF high-band type, Model number is: T74VXJ7D04BK.
The control head housing is HLN4008, inside there are two boards: TRN4344A and a TR4395B. It is a non-scanning, basic 8 channel Systems 90 head.
When I connect all these stuff together, the control head lights up, I am able to change channels, I can control the volume and the squelch. The radio can TX and RX, everything seems fine, except one thing:
On some channels I can hear a loud buzzing from the speaker. The buzzing quits only when I unplug the purple connector (this has the channel selector wires). At this state the radio selects Mode 1 by default. The radio can TX and RX on Mode 1 and there is no buzzing from the speaker.
With the purple connector still unplugged: when I manually short the Mode pins on the J1 connector manually, the radio switches channels and receives/transmits on those without any issue and withput buzzing.
I assume that the TRN4344A board's jumpers are not configurated properly, and this is why the head acts strange.
Unfortunately I didn't find any information regarding the so-called clamshell type or the Systems 90 type heads' jumper settings.
Can comeone point me to the right direction or send the manuals needed?
Thank you in advance.