[AMRadio] mercury vapor tubes

[JAMES HANLON]

Rick,

If your "diode substitutes" throw the voltages all off, something is wrong.  The forward drop across an 866 is only about 11 volts.  The drop across a single silicon diode is about 0.7 volts.  Several in series would have correspondingly more drop.  But the drop across a silicon diode substitute should not be that different from the drop across an 866, and if it does throw the voltages off then something else is going on.

Jim, W8KGI