04-08-2015, 07:00 PM
Next mount the Valve Holders properly and the Terminals.They were meant to be all mounted with the Index 'Down' but the B7G didn't clear the IO so they're all to the Right:-
Now a bit of scruffy Wiring and some Cable Ties to make it look civilised:-
The Eagle-eyed will have spotted by now that there's an extra Terminal. It dawned on me that I'd nowhere to park a Top Cap Lead so added one in
I figured it was a bad idea to have the bottom open as I was bound to pick it up Live one day so a bit of MDF and Feet fills it in.
It Buzzes and Meggers OK.
Finally some Labels for when I forget which way round the Terminals go, and a coat of Laquer to make sure they stay there:-
So, best try it. I have half a dozen EL42 which claim to be NOS but who knows.
The easy way to try them was to tack in a couple of Resistors as per the Data Sheet and measure the Anode Current.
The Sheet says 26mA and that's what they all measured, at least within the limits of my Tests.
Onward and upward
Alan
Now a bit of scruffy Wiring and some Cable Ties to make it look civilised:-
The Eagle-eyed will have spotted by now that there's an extra Terminal. It dawned on me that I'd nowhere to park a Top Cap Lead so added one in
I figured it was a bad idea to have the bottom open as I was bound to pick it up Live one day so a bit of MDF and Feet fills it in.
It Buzzes and Meggers OK.
Finally some Labels for when I forget which way round the Terminals go, and a coat of Laquer to make sure they stay there:-
So, best try it. I have half a dozen EL42 which claim to be NOS but who knows.
The easy way to try them was to tack in a couple of Resistors as per the Data Sheet and measure the Anode Current.
The Sheet says 26mA and that's what they all measured, at least within the limits of my Tests.
Onward and upward
Alan
