Need R-100 parts radio

[fasteddy64]

I need a volume pot on/off switch for an Icom R-100 receiver.
Will take a parts radio or just that part.

 

[RFI-EMI-GUY]

This "may" be the part you need:

ALPS RK0971112 (from the service manual, Section 6 VR Unit)

You might search for the part, or the specifications and try to find a similar part.

 

[RFI-EMI-GUY]

This "may" be the part you need:

ALPS RK0971112 (from the service manual, Section 6 VR Unit)

You might search for the part, or the specifications and try to find a similar part.

Looks similar. Not sure about the resistance taper code. Check the resistance, mechanical specs etc..

RK097 Series - Basic information

Rotary Type, Slide Type, Ring Type, Potentiometer, Electronic Components, Alps Alpine

tech.alpsalpine.com

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjy5uGruY3uAhWs1VkKHUBlCVoQFjAAegQIAxAC&url=https%3A%2F%2Ftech.alpsalpine.com%2Fprod%2Fe%2Fpdf%2Fpotentiometer%2Ftaper.pdf&usg=AOvVaw11cQ-8aQK6DKDQJcmIxvI4

 

[fasteddy64]

thanks.
just thought I would try this route first

 

[RFI-EMI-GUY]

Digikey or Mouser would be a place to buy small quantities.

Otherwise, buy something that fits and wire it in neatly.

Have you tried cleaning the control with 90% alcohol, solvent or control cleaner/lube?

 

[fasteddy64]

the pot itself is fine, it is the built in push button power switch that is not working

 

[WB9YBM]

Digikey or Mouser would be a place to buy small quantities.

Also Jameco & Newark are good parts sources (I've found Jameco to have the best prices, Digi-key to have the biggest selection [but prices slightly higher] with Jameco running a close second on selection size)/

 

[RFI-EMI-GUY]

the pot itself is fine, it is the built in push button power switch that is not working

That's good because you can measure the resistance and determine if it is a linear or audio taper pot.

 

[WB9YBM]

That's good because you can measure the resistance and determine if it is a linear or audio taper pot.

...or add a switch externally in parallel with the existing bad switch? Might not look nice, but might be less expensive / easier?

 

[fasteddy64]

...or add a switch externally in parallel with the existing bad switch? Might not look nice, but might be less expensive / easier?

Obviously that is an option, once again I just thought with the age of this rig I could possibly find a donor candidate out there.

 

[RFI-EMI-GUY]

Obviously that is an option, once again I just thought with the age of this rig I could possibly find a donor candidate out there.

ebay Israel and Cyprus seem to sell parts radios that appear to have gone through several wars. You might find one there.

I bought a clean donor candidate IC-970 (JDM) radio directly from Japan and decided I would rather fix its several problems than use it for a parts donor. So you have the risk of having two radios to fix!

If you cannot find a push on/off style volume/switch, consider just getting one that turns full left for off before drilling extra holes or tearing up the radio. Nobody will really notice.