UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Mike Brett · 23rd Jul 2013, 8:09 am

Hi Les
I was going to fit a toggle switch to protect my 20v heater meter when using the jump lead between the two blue terminals. I am also waiting for another 48v relay I have ordered to protect the meter when turning the Function switch to the 0 position. I was going to power this extra relay from RL2. When the Function switch 0 position is selected RL2 is energized and this would also energize the extra relay thus cutting the 45v to my 20v heater meter.
I thought at least this way I could not forget to operate a switch and destroy another meter. Can you see any problem with this idea.
Mike

23rd Jul 2013, 8:09 am	#907
Mike Brett Retired Dormant Member Join Date: Dec 2005 Location: Wisbech, Cambridgeshire, UK. Posts: 452	Re: The "Sussex" Homebrew Valve Tester. Hi Les I was going to fit a toggle switch to protect my 20v heater meter when using the jump lead between the two blue terminals. I am also waiting for another 48v relay I have ordered to protect the meter when turning the Function switch to the 0 position. I was going to power this extra relay from RL2. When the Function switch 0 position is selected RL2 is energized and this would also energize the extra relay thus cutting the 45v to my 20v heater meter. I thought at least this way I could not forget to operate a switch and destroy another meter. Can you see any problem with this idea. Mike