Serviceman's Valve Tester - UK Vintage Radio Repair and Restoration Discussion Forum

Radio Tech · 20th Nov 2014, 2:31 pm

Re this thread: https://www.vintage-radio.net/forum/...d.php?t=111345

Hello Ed

Here is the circuit of the project I am going to build with regard to Switches and Pots that I wanted.

Regards

Ken

Ed_Dinning · 20th Nov 2014, 9:19 pm

Hi Ken, I'll reply fully by PM, but it looks like I may have a 1P 23W switch for heaters; probably only rated at about 1A though, so you would need to be careful with opower valves or use the switch to drive small relays to do the actual switching.
S4 to S13 would be best as lever keys as they are compact and need to be individual
1P 3W switches. I probably have sufficient but they will take up some space.

Ed

Top Cap · 21st Nov 2014, 12:32 am

Hi Ken, I looked at a similar design some time ago before I built the Sussex.
I was going to use the clever on-on-on toggle switch for the 3-way electrode selectors. These ones on RS are only £1-71 each, probably the cheapest toggle switches on their site. Many people get stuck trying to work out how to wire them, even I get confused still at times

.

I think I have it right in the attached sketches, but they could be a clever option if you cannot locate the sliding version.

BTW have you ever tried cutting the slots for these switches?

A reason I would rather just drill a hole

Cheers, Les

20th Nov 2014, 9:19 pm	#2
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,195	Re: Serviceman's Valve Tester Hi Ken, I'll reply fully by PM, but it looks like I may have a 1P 23W switch for heaters; probably only rated at about 1A though, so you would need to be careful with opower valves or use the switch to drive small relays to do the actual switching. S4 to S13 would be best as lever keys as they are compact and need to be individual 1P 3W switches. I probably have sufficient but they will take up some space. Ed

21st Nov 2014, 12:32 am	#3
Top Cap Octode Join Date: Mar 2006 Location: Watford, Hertfordshire, UK. Posts: 1,270	Re: Serviceman's Valve Tester Hi Ken, I looked at a similar design some time ago before I built the Sussex. I was going to use the clever on-on-on toggle switch for the 3-way electrode selectors. These ones on RS are only £1-71 each, probably the cheapest toggle switches on their site. Many people get stuck trying to work out how to wire them, even I get confused still at times . I think I have it right in the attached sketches, but they could be a clever option if you cannot locate the sliding version. BTW have you ever tried cutting the slots for these switches? A reason I would rather just drill a hole Cheers, Les Attached Thumbnails __________________ Whether the Top Cap is Grid or Anode - touching it will give you a buzz either way!