Dentron Series GLA-1000 Amplifier Relay Connections
SVETLANA EL-509\6KG6 TUBES ONLY
THE STAND-BY MODE OR IN RECEIVE CATHODE BIAS IS DROPPED ACROSS THE 75K OHM
RESISTOR SHUTTING THE TUBES OFF. IDLING
PLATE CURRENT IS THEREFORE REDUCED TO A VERY LOW VALUE.
IN THE TRANSMIT MODE THE RESISTOR IS OPENED REMOVING IT FROM THE CIRCUIT.
THIS SETS TRANSMIT IDLING PLATE CURRENT TO ABOUT 100 MA.
RECEIVE MODE SIGNALS COME IN FROM ANTENNA VIA THE COAX CONNECTOR ON THE BACK OF
THE AMP (RF Out) into the relay center contact
(the one that makes or breaks) through the jumper into RF In which delivers the
signal to the reciever..
forget to install a 1N4007 diode across the relay's coil connections** The cathode (band)
the diode is soldered to point (y) ,+DC, on the schematic** and the anode of the
diode is soldered to the -DC side (GROUND).