The system operates, on 445.560 MHz using minus (-)5 MHz shift and is PL'ed at 146.2 Hz. If your Radio supports CTCSS decode, you can use Encode/Decode at 146.2 Hz. This way your receiver is muted until it decodes the 146.2 Hz and opens your receivers audio. If configured as before it also will eliminate most of the squelch crashes.

The KJ6ZD repeater is made of an Hamtronics R-305 synthesized receiver set to 440.560 MHz  and a Hamtronics T-304 Exciter at 445.560 MHz. As of August 2011, the system has been coordinated by SCRRBA  to the before mentioned Frequency Pair.

The receiver is somewhat sensitive to the slightest de-tune of Duplexer and  will blow the receiver front-end right into silicon heaven, if the de-tune is excessive. I have replaced most of the RF section a few times. This is a problem that might be found with high power Solid State amplifier. The Duplexer must be tuned to the exact operating frequency and some transmitter noise may never be completely notched out, especially at levels greater than 50W. The 70cm Exciter is actually working quiet fine but has some power drifts that I personally don't like. All over impression is that if you want to use the HAMTRONICS stuff, you'll have to finish the design in certain areas. Out of the box, trust me, it will cause problems if you are not experienced. Although, not claimed to be, it is not plug and play and the other phrase applies more "PLUG AND PRAY". Also, without the proper test equipment it may cause frustration since the gear is very sensitive.

The repeater system can be remotely switched to low power output. while the system runs on battery. On AC loss a special macro that hopefully senses the loss of AC power will execute and switch the system to low power automatically via dropout relay to protect the Henry from being driven dry. The Amp would drain the Battery in no time with about 20 Amps pulling out of the 55Ah battery. Therefore, the high power is inappropriate during Emergencies and the system was meant to cover the local area only. The 146.2 Hz tone is used as incoming and outgoing squelch. Your Radio can be set to mute other signals, perhaps present on the frequency.

The Arcom RC210 repeater controller is directing the received audio to the appropriate output ports. This controller has a total of three ports. The repeater operates on Port One. On Port Two is another set of HAMTRONICS receiver/transmitter via custom circuit connected. It has actually formed a 2m  transceiver operating on a simplex frequency. The separate modules where chosen to be able to convert the system over to a repeater. The Echo-Link is connected to Port Three  By using the HAMTRONICS gear audio problems can be solved on all ports since the modulation index is the same within their line. The individual ports can be linked or unlinked, making them stand alone ports. A Scheduler would normally take care of the linking and unlinking at certain times. Unfortunately, the Controller resets, gets hung up in limbo and resets for whatever the reason maybe. If this happens the Clock (Real Time) gets lost and the scheduler does not work, of course. Until I have figured out what causes the random resets it will not have any timed schedules.

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