Very cool. Remember that tubes don't start as quickly as silicon. I thought something was wrong -- I just had to wait a little. Nice design. Well made. Carefully packaged. Recommended. This circuit uses a 5V regulator and a string of diodes to bring the 12V input down for the heater.
Very cool. Remember that tubes don't start as quickly as silicon. I thought something was wrong -- I just had to wait a little. Nice design. Well made. Carefully packaged. Recommended. This circuit uses a 5V regulator and a string of diodes to bring the 12V input down for the heater.