20 Jul
2010
20 Jul
'10
7:59 a.m.
On Mon, 19 Jul 2010, Tony Duell wrote:
In other words, if oyu know what the valve is, fine,
but there's no way
you'll work it out from the type number. But if somebody says to me
'EFM1', I know it's a combination signal pentode and 'magic eye'
indicator (yes, such a device did exist!) with a 6.3V heater on a P side
contact base. And a UCH81 is a triode-hexode freqeucny changer with a
100mA series-string heater on a B9A base. And so on
And that even (mostly) works with the old Telefunken scheme, e.g. REN904
or RENS1374d.
Christian