• 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.

high voltage delay

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Hi together


I am new here in this forum. Sorry for my english.
I bought for 4 weeks ago a tube amplifier as kit from Boyuu (EL34).
Befor I beginn with built the amplifier I have read in many forum that many people are speaking about time delay for the high voltage. My amplifier has a tube rectifier and not a semiconducors rectifier. I ask me if it is necessary to built in a time delay for the high voltage because the rectifier tube need also time to become warm. Is my thinking correct or not ?


best regards

Michel:goodbad:
 
Hi together


I am new here in this forum. Sorry for my english.
I bought for 4 weeks ago a tube amplifier as kit from Boyuu (EL34).
Befor I beginn with built the amplifier I have read in many forum that many people are speaking about time delay for the high voltage. My amplifier has a tube rectifier and not a semiconducors rectifier. I ask me if it is necessary to built in a time delay for the high voltage because the rectifier tube need also time to become warm. Is my thinking correct or not ?


best regards

Michel:goodbad:
The short version : No


The longer version : No, it's not needed and might even be damaging.
 
OKay thank you for your very fast answer Petertub. I can now go ahead with the assembly of the amplifier.


Michel
What might be of value is one or more "bleeder resistors" that will unload
the B+ caps, this to prevent lethal voltage when working with the amp.

Some 100k might be a starting value, they might get warm during usage

thus a 2w mounted "airy" might be suggested.
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.