[Amps] EIMAC 3-400 vs. 3-500 how to ID??

[R.Measures]

=F0  An Eimac 3-400 is c. 0.62" shorter than a 3-500 - and it has a=20
shorter fins on its anode cooler. However peak emission is the same, as=20=

is PEP output, for both bottles.

On Jul 1, 2004, at 3:54 PM, bearlabs at netzero.net wrote:

>
>
> Due to lack of personal experience over the years with these tubes
> I don't know the answer, do you?
>
>  - Is there a reliable way to ID an EIMAC 3-400 vs. a 3-500 beyond
> reading the silkscreened info? Assume it is rubbed off completely.
>
>  - Q2. is there *any* reason in a standard ham two hole linear=20
> amplifier to *not run a 3-400 with a 3-500?
>
>  TIA,
>
>      _-_-bear wb2gcr
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org