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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 30th Jun 2020, 12:29 pm   #1
David Simpson
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Default Old & New Rotary Switches

Cor, F-A-Duck ! Has anyone seen the cost of modern Rotary(Wafer) Switch assemblies recently ?
Referring to the "Roberts" valve tester thread in "Test Eq"., decided to delve into a huge plastic box of mainly an NOS RS Switch Construction Kit, plus a decent handful of salvaged/recovered/given older "yaxley type paxolin & ceramic wafer switches. Was looking for single pole/10 way wafers, plus some lesser combinations, for the "Roberts Revival Hybrid" which might(or might not)go ahead.
I've just got an old set of RS Catalogues from 2008, and was amazed by the cost(even back then) of individual(or in 10's) wafers, and all the mechanical switch assembly bits & bobs. Just leafed through a page or two & quickly got to a rough estimate of 100 for just a couple of handfuls of wafers. Then roughly estimated the rest, plus all the mechanical bitties - total = what - 300 to 400 effing quid !
Originally, the wafer kit came mainly in 5 of those lovely big yellow RS 6" x 10" 18 compartment plastic boxes with clear Perspex lids. But I needed them for heaps of nuts, bolts, washers, wee bulbs, etc.
God forbid that anyone needed to replace a switch or two in an AVO VCM, or HP gear, etc. with more robust ceramic or modern composite insulated wafers, instead of RS's basic plastic ones.
PS. The old Roberts switches are in the bottom l/h corner of the table.

Regards, David
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Old 30th Jun 2020, 10:52 pm   #2
joebog1
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Default Re: Old & New Rotary Switches

I buy beautiful ceramic double contact wafer switches from that site. They are available in hundreds of combinations and patterns. My latest purchase was 9 pole 4 position, so three wafers with nice ball indent clicker plate. They were $5 aussie dollars each, post free and took 6 days to get here from China.
Search " Ceramic rotary switch". it should pull up hundreds of different styles.

Joe
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Old 1st Jul 2020, 5:00 pm   #3
David Simpson
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Default Re: Old & New Rotary Switches

Thanks Joe for that info. Right enough, those ceramic wafers would be ideal. On eBay, the ones from China are flogged through the USA, so one sw. costing a fiver attracts a postage & customs charge of $30!
I'll delve through my RS "MAKA - SWITCHES" box of kit meantime, and see what combinations I could use. A lot of the older 2nd hand ones I have are paxolin wafers & need de-soldering. To obtain the best combination for valve testing I'll need a minimum of nine 1pole/10 way wafers(break before make), plus two or three others. The other factor I have to consider is the cabinet depth which is 3".

Regards, David
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Old 1st Jul 2020, 6:14 pm   #4
Keith956
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Default Re: Old & New Rotary Switches

I guess the rules don't allow me to be more specific but there are Hong Kong based sellers on ebay that will sell you rotary switches with free postage, I recently bought a 4p 8w one for 5.73, came with a knob too.
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