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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 1st October 2017, 05:22 PM   #1
zman01 is offline zman01  Bangladesh
diyAudio Member
Join Date: Feb 2011
Location: Dhaka
Power switch options
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I was going through the gallery of Tubelab amps built by diyA members. Unfortunately some of the pics are no longer visible due to broken links.

One thing I noticed that the most common style of switches are toggle type ones. I've used rocker type switches, and I guess others use that too. What about latching switches - something like this?

22mm Waterproof 12V Self locking or Reset ring illumination Black Latching Anti vandal push button switch-in Switches from Home Improvement on Aliexpress.com | Alibaba Group

Would this be a safe/good choice? Any concerns with in-rush current or plate voltages?
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Old 2nd October 2017, 06:26 PM   #2
w5jag is offline w5jag  United States
diyAudio Member
Join Date: Feb 2007
Location: Arkansas
I use a round rocker, with an outline LED illumination, for the AC mains on my SSE. It's been trouble free.

If you want a latch switch, that switch seems like it would be fine - it's rated for 5 amps at 220VAC, and claims 2000 volt insulation. You can get the LED ring in about any color or voltage up to 220 volts.

One thing that is a little unclear to me, is the actual operation of the LED itself. The LED in my switch runs right off the AC main voltage, without rectification. The schematic for that switch shows a series resistor, but nothing else, so you may need some additional circuitry.

Win W5AG

edit: price may be a bit high - not sure of parts availability in Bangladesh. I pay about that for a similar switch at Radio Shack. I would expect it to be a bit cheaper when the middlemen are out of the distribution system.

I guess I need to order some more - the type I use has been marked down to $2 USD from $7 USD. RadioShack SPST 125-Volt AC Illuminated Switch

Last edited by w5jag; 2nd October 2017 at 06:40 PM.
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