Spectra A7 Head "mystery switch"

[phillipsc84]

Can anyone help identify the purpose of the switch in the picture of the A7 head?

http://www.pwhome.net/misc/CIMG3474.JPG

Anyone who can help I look forward to your replies.

[Jim202]

What switch, all I see is a wire soldered onto the back of the head circuit board.

Jim

Can anyone help identify the purpose of the switch in the picture of the A7 head?

http://www.pwhome.net/misc/CIMG3474.JPG

Anyone who can help I look forward to your replies.

[Will]

What switch, all I see is a wire soldered onto the back of the head circuit board.

Jim

Yah, what switch?

[Will]

What I do see is a added red wire from pin 7 and a black wire from PTT. Seems a good way to lockup TX.....

OPPS.. Sorry, Jack IS correct, the black wire IS connected to ground.

So what does the front side look like????

[jackhackett]

I think if you look a little closer you'll see that the black wire (it's a little tough to spot, I didn't even notice it until Will mentioned it) is connected to pin 1 on the mic jack, which is ground.

The red wire appears to be connected to one side of the pads for a jumper. I don't have diagrams for that exact head, but a similar head has jumper spots in that area related to the "VIP out" functions. Since those jumpers aren't normally in, this may have been just a convenient place to pick up an unused connection from the head into the radio, or maybe to the rear accessory connector.

A few questions for the original poster:
Are there any modules inside the radio, or signs that one may have once been there and then been removed?
What type of switch is it, momentary pushbutton, toggle, something else?
Do you know what kind of service the radio was formerly used in? Was it a police radio?

[SlimBob]

Is the Spectra one of the radios that has to have MIC HI grounded to program the EEPROM?

[Will]

Is the Spectra one of the radios that has to have MIC HI grounded to program the EEPROM?

NO

[com501]

This looks like an old Transcrypt or Cimarron mod. Look for a scrambler or special signalling board in the radio.

[phillipsc84]

Sprry for the delayed response. The Switch is just a small togel switch right above the MIC jack. The CH was bought seperately so I do not know any details on teh original radio used with it. Again sorry for the failure to mention that the switch is on the front and the red and black wires are what connect to it.

[phillipsc84]

Additionaly there do no appear to be any other mods done to this CH. Nothing looks removed or added except for the togggle switch.

[WB6NVH]

There were a bunch of those heads on eBay awhile back; small toggle switch above the mike jack. I think the heads were surplus from the feds...