How do I hook up this PT

menger66 · Post by **menger66** » Tue Jun 23, 2015 3:27 pm

I pulled this from a reel to reel it ran 2 12ax7 6aq5 and a ez80, but there's no high voltage center tap I'm hoping I can use a tube rectifier these is a extra 6.3 filaments I just don't understand how they did it. Mark

ampgeek · Post by **ampgeek** » Tue Jun 23, 2015 3:30 pm

Full wave bridge (diode) rectifier maybe?
See the attached for a couple of examples.
Cheers,
Dave O.

martin manning · Post by **martin manning** » Tue Jun 23, 2015 3:52 pm

Could it be that the original circuit was half-wave rectified?

menger66 · Post by **menger66** » Tue Jun 23, 2015 4:00 pm

The thing is that this was being used with tube rectifier some how I should under 300volts the problem is rated @ 50ma not sure if I can run a el84

Smokebreak · Post by **Smokebreak** » Wed Jun 24, 2015 3:55 am

How about a hybrid bridge?
http://www.valvewizard.co.uk/bridge.html

JazzGuitarGimp · Post by **JazzGuitarGimp** » Wed Jun 24, 2015 7:13 am

Smokebreak wrote:How about a hybrid bridge?
http://www.valvewizard.co.uk/bridge.html

Smarty pants!

Stevem · Post by **Stevem** » Wed Jun 24, 2015 10:49 am

With only 50ma that's gonna be tuff, I would thing about may be a ECL82!

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