RM Italy 203P Manually keying the amp. parts needed?

[doffo]

Hello everyone,
I just have a picture which looks to be 2 parts needed in order to manually key the amp. A diode and a resistor inline, but hard to tell which ones they are in the picture I included. Found the facebook post doing a google search, but since I dont have a facebook (since 2022), then no real way for me to ask the person directly.

Maybe someone here would know the 2 parts needed. Thanks for all the help so far.

 

[sp5it]

Switch and wire. All you need.

 

[doffo]

Switch and wire. All you need.

What would be the reason that the resistor and the diode was included?

 

[sp5it]

No idea.

 

[doffo]

No idea.

From the post, it only mentioned that it was to take in a 4v-15v dc in from a radio to key it. I just needed it to be keyed so one can adjust the gate bias after putting in an adjustable 20k variable resistor in place.

 

[sp5it]

To put this amp in TX just short C and E of TR1

 

[doffo]

To put this amp in TX just short C and E of TR1

Much appreciate. Thank you.

 

[nomadradio]

Didn't have any luck, or the patience to snip the component layout diagram from this PDF file and insert it that way.

Find the relay RL1. The attached PDF has a layout diagram just below the schematic. RL1 is on the edge of the circuit board. At the end of RL1 nearest the midpoint of the board is a diode D5. If there is enough of the diode's lead exposed, lap-solder a wire to the NOT BANDED end of D5, the end pointing away from the edge of the circuit board. This wire will go to the center pin of a typical RCA plug matching the radio's linear-key jack. The other wire to the radio's keying jack or foot switch goes to ground.

Gotta be better than removing the pc board just to solder a wire to the solder side.

73