Toy12 Plasma tweeter Diy-4

This week finish audio amp. (6C45pi) and IF modulation (ECL82) circuit.


For good shielding reason I design to build a small space for IF module.
But this cause it's hard to hand make and modify circuit.


Finish IF high-voltage and prepare for 6C5pi,ECL82,PL519 heater test.
Meanwhile I measure PL519 (insert already) heater voltage only 36.4V.
I got check spec. of  PL519.  So far the transformer of heater  is one way ticket.



The PL519 heater light is turn on.