Re: [Amps] Different 3-500Z amplifiers

["Carl" <km1h@jeremy.mv.com>]

Heat dissipation is the same for identical power but the graphite version 
takes longer to reach that point, retains it a lot longer, and should be 
given an extra few minutes of fan time before shutting off.
Carl
KM1H


----- Original Message ----- 
From: "David Craig" <davidhcraig@verizon.net>
To: "'Amps reflector'" <amps@contesting.com>; "'Paul Baldock'" 
<paul@paulbaldock.com>
Sent: Tuesday, May 28, 2013 11:16 AM
Subject: Re: [Amps] Different 3-500Z amplifiers


> IMHO the graphite anode version puts out & maintains WAY MORE heat
> than the good old moly style.  Just noticed recently RF Parts has a 
> mention
> about that too.
>
> Dave N3DB
>
> -----Original Message-----
> From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Carl
> Sent: Tuesday, May 28, 2013 10:43 AM
> To: 'Amps reflector'; Paul Baldock
> Subject: Re: [Amps] Different 3-500Z amplifiers
>
> Metal anodes were produced by Eimac and China.
>
> Graphite anodes were/are produced by Eimac, Amperex, Philps, and China.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- 
> From: "Paul Baldock" <paul@paulbaldock.com>
> To: "'Amps reflector'" <amps@contesting.com>
> Sent: Monday, May 27, 2013 10:05 PM
> Subject: [Amps] Different 3-500Z amplifiers
>
>
> > I have 2 amps with 3-500Zs. The 3-500Z's have Eimac labeling. The
> > anode of these has vertical fins.
> >
> > I just acquired another amp with 3-500Zs. These tubes have no
> > lebeling and have an anode with  a horizontal disks.
> >
> > Could somebody educate me on the operational difference if any of
> > these 2 very different looking 3-500Z's?
> >
> > Thanks
> >
> > - Paul
> >
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