• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

heater sec voltage 6.3v

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jamesfeline

jamesfeline

Bespoke Constructor
Joined 2006
Paid Member
Hello

Just a quick question fellow forum members ... is it ok to use a 6V sec ac instead of a 6.3 sec transformer for the heaters (EL34)

Its just that most of the transformers (high current) are 6v .. the 0.3v drop would make no difference ??

regards
 
AquaTarkus

AquaTarkus

Member
Joined 2017
Yes, in theory, that will be fine. Generally, you need to stay within +-10% of the nominal 6.3V. However, how do you know that you actually have 6VAC? Mains voltages are almost never standard, and load on the transformer will tend to cause the heater voltage to sag. So you probably won't know for sure without taking measurements under load.

Sent from my phone with Tapatalk. Please excuse any typpos.
 
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