[Amps] Different 3-500Z amplifiers

[David Craig]

	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 at 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 at paulbaldock.com>
To: "'Amps reflector'" <amps at 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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