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Jeb-D. 4th February 2009 12:21 AM

VR tubes in single ended circuits
It seems that VR tubes can be a little tricky to incorporate as regulators in single ended designs. I get a significant speaker pop when the ionization voltage is reached on power up (because it quickly drops to the regulation voltage).

I know others are using them, but I have yet to hear anyone mention similar problems. The only solution I can think of is to apply B+ before the heaters. Though this is generally bad practice. Anyone got any tricks?

For the time being, I'm using a Zener diode. Though it would be cool to use a VR tube instead (they look cool and I have a quantity of them).

dsavitsk 4th February 2009 12:31 AM

Mine pops too. So, no help from me other than you could use a timer to connect or disconnect the speakers. And, I have also resorted to zeners in places.

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