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LA6NCA Tube Radio Power |
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LA6NCA Tube Radio Power |
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| I have designed a new power
for old tube radios with 1.5 Volt and 90 Volt battery. This is very difficult. The radios have a loop antenna and the power is located in the middle of the loop. It must therefore not have any EMC radiation. It therefore works with 50 Hz sinus. |
The Power is here mounted in a
David Andersen radio.
| I have hundreds of 115V to
15 volt powers with transformer. I have designed a circuit board that reuses box, transformer and heat sink. |
I produce a small series of powers.
| IC1 is the 1.5V
regulator, LM317 IC2 is a stereo amplifier, TDA7297 J7 is output to the transformer. Pin 14 and not pin 15 shall be used. |