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Trialmo receiver schematic

Geschreven door Thierry Magis op 02. Mei 2006 20:19:07:

Hello,

Found this week-end this Trialmo model 411 receiver. Seems to be dated 1930 (hand-write inside).

All tubes ok, but alas, some of the wire-wound resistors are cut.

Mains 110V DC supply, tubes : B406, A409, A425, A442, 1904. Heaters are serial-connected, with resistors parallel on each tube heater.
The 1904 + 6 wirewound resistors are serial connected with the heaters. All of this is directly connected to mains via a big inductor.

Anod voltage come directly from mains, via inductor + smoothing capacitors.

I'm searching the schematic of this appliance... I'd wish to hear it playing :-)

I don't know the values of the dead resistors, and also I'm not sure of the tubeset (maybe some tubes replaced in the past?)

Many thanks !

Greetings from Belgium
Thierry







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