In article ,
"Michael A. Terrell" wrote:

"Harold E. Johnson" wrote:

All,
The switch has two wafers (decks A and B in diagram below), six
positions and rotates 180 degrees. The Heathkit part number is
63-212. The diagram gives significant detail as to the functioning of
the switch:

http://www.nostalgickitscentral.com/...schema_ig102.g
if

Thanks again, and happy holidays,
M100C

That AR section is a killer, I don't have a wafer with the open circuit
seeking section. But it appears from the schematic that that section is not
used.


You need to look again. That wafer A, rear section is used to short
out the coils for the bands that are not in use. It is a very special
switch, and the basic design was used in multiple brands of low end
signal generators.

The same type of "open circuit seeking" switch was also used as an input
selector in Hi-Fi preamps and amplifiers.

--
Regards,

John Byrns

Surf my web pages at, http://fmamradios.com/

You need to look again. That wafer A, rear section is used to short
out the coils for the bands that are not in use. It is a very special
switch, and the basic design was used in multiple brands of low end
signal generators.

The same type of "open circuit seeking" switch was also used as an input
selector in Hi-Fi preamps and amplifiers.

--
Regards,

John Byrns

Well, the OCS switch was used in a lot of places. Every Ledex switch ever
made had one in it to stop the rotation when the selected position was
satisfied.

The schematic I find, is very difficult to read, but importing it into
Photoshop where I can blow it up, I see now that the wafer pins are numbered
to tie to the front section. Sorry M0, I can't help you.

W4ZCB