Quote:
Originally Posted by vortalexfan
Is it normal for a 6.3V Tube to glow white hot and then burn out after 3 seconds in a socket originally meant for a 3V tube in a series string set?
|
Yes.
A little factoid worth bookmarking:
A series circuit is
constant current thru the whole string.
A parallel circuit is
constant voltage across the whole (i.e., the voltage across each component is the same, tho each may draw different current).
Quote:
|
I was thinking that it was possible to install a higher voltage tube in a lower voltage tube spot in series string radios and TVs
|
A higher-voltage rated heater has higher resistance, thus runs hotter in the constant-current string (that's why the 6CB6's heater was actually seeing closer to 12 volts and blew its cookies).
Quote:
(like how you can sub in place of a 35L6 a 50L6 on old Series string radios and it would run fine.)
Am I missing something here? 
|
The 35 and 50 volt heaters are both designed for the same current (.15 A).