Valve Gallery -
Screened Tetrodes And Pentodes (2)
VMS4, MS-PEN, VMP4G, SP61.
|Shown above is a Marconi Osram VMP4G, which
dates from about 1930. Threaded contact at the top would have been
tightened down onto fly wire connection. B7 base with 4v heater var
u of height 145mm.
||Shown above is a Mazda SP61 valve with Mazda
Octal base. This valve is of 103mm height and 6.3v heater.
Continue to the next Screened
Tetrodes and Pentodes gallery page
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