WTB: Six position band switch for Heathkit IG-102 RF signal generator ...

I have a large selection of rotary switches, quite a few with 6 positions. How many poles do you need? Does this switch have 2 sets of 6 positions on each wafer? If so, how many wafters does it have? What does the old switch measure between the bolts that hold the assembly together?

W4ZCB

f . n h

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:

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Thanks again, and happy holidays, M100C

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:

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. Is this correct? Are you M1OOC or M100C?

W4ZCB

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. I built a couple of those in the '70s, and repaired several others for people who messed them up.

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

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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

I'd bet most of the Heathkit shop generators used similar switches. I take it you can't repair that one? I'd suggest joining the Heathkit group on Yahoo! It is a very large and very active group.

Pete

Try this guy:

snipped-for-privacy@D8aPro.com

He's bought the rights to the legacy Heath literature and has a ton of spare parts from the company. If he doesn't have it, I'd expect you'll find a parts unit over at the Yahoo! group.

Pete