Scored Two NOS GZ34s

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Scored Two NOS GZ34s

Postby kt88pppamp » Tue May 21, 2013 1:42 pm

In a shop somewhere I scored two NOS GZ34 tubes for $50. They are a US Made Sylvania and a British General Electric. What do you think?

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Re: Scored Two NOS GZ34s

Postby kheper » Tue May 21, 2013 2:16 pm

For a few years - before I went SS, I paid $90 a pop for NOS Amperex Bugle Boy 5ar4s. Those tubes will perform on par with the Amperex, at only $25 per tube.
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Re: Scored Two NOS GZ34s

Postby Geek » Tue May 21, 2013 2:54 pm

kheper wrote:...I paid $90 a pop for NOS Amperex Bugle Boy 5ar4s....


U got h0z3d (sick) :$
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Re: Scored Two NOS GZ34s

Postby battradio » Tue May 21, 2013 2:59 pm

I had bad luck with the , the Sylvaina 5AR4's , had 3 NOS would drop more voltage than a 5U4GB .
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Re: Scored Two NOS GZ34s

Postby kt88pppamp » Tue May 21, 2013 5:34 pm

We will just have to see what B+ comes out to be on the Sylvania.
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Re: Scored Two NOS GZ34s

Postby kt88pppamp » Thu May 23, 2013 8:35 pm

My Sylvania delivers 490 volts B+ in my modded MKIII at full load.

No dud tube there. battradio, what circuit did you use your bad 5AR4's in. Statistics say there are bad apples in every bunch. Circuits that draw more current will obviously be affected more.
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Re: Scored Two NOS GZ34s

Postby EWBrown » Fri May 24, 2013 8:50 am

I have one "Dynaco" labeled GZ34, which tests as having absolutely no emissions, the filament lights up, and there is no "white fog" on the glass.

I'm thinking that the anode pins may need to be re-soldered, as they may have corroded "open"... :/ *) (???) :'(

I guess I can't complain too loudly, it was a freebie, just one, in a box o' plinkers...

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