Neat idea. Delays B+ coming up in a radio and does away with an added resistor. One negative, requires some rewiring.
:::Cathode stripping or bombardment would only occur with a lot higher B+ voltages. Consider radios with a selenium rectifier. These never have any problem with instant B+
::I thought I read somewhere that the 6AX5 was a safe replacement for the 6X5?
:Hi Elton and the whole forum,
: I agree with all that was written above. I commonly restore radios from the 1950's that have selenium rectifiers. Some still have their original power output tubes, not cathode stripped.
: To maintain the time delay, though I wonder what you think of this idea. Replace the 6X5G tubes with the diodes as before, but do not use the resistor. Diconnect the transformer center tap and connect it to the cathode of the 6X5G, then ground its plate or take the plate to where the center tap had gone if not ground.
: Now the 6X5G tube will still create the timed turn on and drop the extra voltage, eliminating the need for the 150 Ohm resistor. If an H-K short develops in the 6X5G, it will not be a big problem as no voltage on the tube will be much above ground.
: What do you think?
:All the Best,