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Old 09-01-2021, 09:45 AM
old_coot88 old_coot88 is offline
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Join Date: Sep 2009
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Quote:
Originally Posted by Electronic M View Post
I think I may have a 1U6 in my tube stash.
Be sure it's not mistaken for 1U4 or 1U5 which are different critters.

Quote:
Aside from the heater* is it compatible with the 1L6 and capable of opperating on SW?
According to the posted article it is. But I can't verify it, and online info on it is scarce.

Quote:
* The heater could be worked around with a parallel resistor to increase the current draw to match the 1L6.
The paralleled resistor (same ohms value as the filament when hot) does not increase current draw (which is a constant 50 ma.) but splits it in half for the tube. Remember that in a series circuit, current thru the whole string is constant. Whereas in a parallel circuit (imagine 6V paralleled heaters), voltage is constant across the lot. Series = constant-current, parallel = constant-voltage.
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