20-07-2020, 02:17 PM
(This post was last modified: 20-07-2020, 02:18 PM by Mike Watterson.)
Here we are:
https://www.radiomuseum.org/forum/replac...rs.html#13
From 2011
A good simple test on mains sets with parallel valves, or a Series system where you use external HT, or the rectifier isn't part of the series heaters, or you stick a 1N4007 in the rectifier socket is to measure all the g1 pins and g2 pins with no valves fitted. The g2 pins should all be HT and the g1 pins all 0V, except in special cases. Or use a +90V test supply normally used by a battery valve radio.
The VRAT article is long gone.
https://www.radiomuseum.org/forum/replac...rs.html#13
From 2011
A good simple test on mains sets with parallel valves, or a Series system where you use external HT, or the rectifier isn't part of the series heaters, or you stick a 1N4007 in the rectifier socket is to measure all the g1 pins and g2 pins with no valves fitted. The g2 pins should all be HT and the g1 pins all 0V, except in special cases. Or use a +90V test supply normally used by a battery valve radio.
The VRAT article is long gone.
