At 07:42 AM 4/3/2008, George Henry wrote:
The connection information in the following link may prove helpful:
<<http://www.repeater-builder.com/kenwood/rc210-to-tkr.pdf>http://www.repeater-builder.com/kenwood/rc210-to-tkr.pdf>
Receive audio appears to be pin 10, not 11, and pin 16 is the PTT
input for the Kenwood, not an output. You need to feed either the
TOS output (pin 24) or COS output (pin 25), to an inverter that then
pulls the PTT of the Icom low.
<----A couple of things here. First of all, Pin 10 is "RA" audio,
Kenwood's nomenclature for deemphasised audio whereas pin 11 is,
essentially, discriminator audio. Whether or not this is the one he
wants depends on how TX audio is being fed to the Icom.
As for COR out (or TOR), the TKR needs to be programmed to supply
that and should be done as active high. My suggestion is to use Aux
In/Out 5 and/or 6. I do agree he should use a buffer transistor to
the Icom's PTT input to protect the TKR.
Also, PTT Priority needs to be programmed for the TKR so it will
respond appropriately to its own repeat PTT and the external one
Ken
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