[AMRadio] GZ34 Tube

manualman at juno.com manualman at juno.com
Thu Feb 10 16:53:40 EST 2011


You can build a solid state rectifier replacement for pennies. Given the
tube lineup, a 5U4 or 5R4, with rewired socket, should also work fine.

Pete, wa2cwa
http://www.manualman.com

On Thu, 10 Feb 2011 16:47:25 -0500 rbethman <rbethman at comcast.net>
writes:
> Rewiring for a sub "may" seem to be a reasonable "fix".  However, 
> look 
> carefully at the max plate voltages, max plate current, and the 
> like!  I 
> was just looking at the different possibilities, and was pretty 
> surprised at the ratings of the GZ34 / 5AR4.
> 
> If those ratings are "really" needed, the "normal" suspects as 
> 5Y3GTs, 
> 5R4s, 5U4s won't cut it!
> 
> (Just going through a Sylvania Tube Characteristics Manual.)
> 
> Bob - N0DGN
> 
> On 2/10/2011 4:36 PM, Jim Wilhite wrote:
> > Are you sure?
> >
> > 
> http://esrc.homestead.com/vacuumtubes_tubelist_tubes_5A5-5Z4G.html
> >
> > This is the only guy I found with one,  for $65.00.  That is a lot 
> for a
> > rectifier.
> >
> > You might be advised to rewire for a sub of some sort.
> >
> > 73
> >
> > Jim/W5JO
> >
> >
> > ----- Original Message -----
> >
> >> I need a GZ34, or 5AR4 tube for my Eico 720 transmitter.
> >>
> >> Does anyone have one they can part with?  Thanks,
> >>
> >> Ron ,    WA9QNN


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