[Amps] Alpha 8410 using 4CX1500B - why?

Prem va3uma at gmail.com
Tue Oct 28 17:32:37 EDT 2014


The first thing that comes to my mind is, the grid dissipation is 0W
(4CX1000A), and the plate dissipation is lower than a 4CX1500B.

I'm not sure about the o/p being lower in the 4CX1500B; should be higher as
per specs.

73,
Prem.

On Tue, Oct 28, 2014 at 4:35 PM, Peter Sils via Amps <amps at contesting.com>
wrote:

> I recently acquired a slightly used 8410 (mfg 3/2014). I was surprised to
> learn it had 4CX1500B tubes rather than the 4CX1000A's.
>
> Looking at the RF Concepts website for tubes I notice the price is lower
> on the 4CX1000A ($475) than the 4CX1500B ($525).
>
> From what I have gathered the drive requirement is higher and the output
> is lower.
>
> Can anyone shed light on why Alpha chose to go with the 4CX1500B's?
>
>
> TNX in advance of your insights!
>
> 73 Peter
> KD0AA
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