|
Nederlands Forum over Oude Radio's |
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
- Another picture Thierry Magis 02.5.2006 20:20 (0)