[Amps] "10 Meter Ban" to be lifted ...

[dcoffman at iquest.net]

What is the advantage of the second tube?  Would the original power supply 
handle the additional current requirements to drive the second tube to full 
potential?

Thanks,

Doug - N9XTF

Quoting Paul Christensen <w9ac at arrl.net>:

> "Years ago the Alpha 77Dx was manufactured with one 8877 tube and a square
> plate that could be removed to add a second 8877, making a 77Sx...."
> 
> Yes, I own one with the plate still intact.   Back in the early '90s, I was 
> also considering the purchase of the 87A as an alternative to the 77Dx. 
> While talking to Ray one day, he conveyed all those issues, including 160M 
> inefficiencies which may have gone to the point of the doorknob caps. 
> Anyway, after my discussion, I was convinced that it was just a trick to 
> foster new hardware sales.   There's more money to be made on the sale of a 
> new amp than in the sale of some parts.  But there seems to be some truth to
> 
> his assertion, although I'm still happy with the 77Dx purchase some 15+ 
> years later.
> 
> For several reasons, I've never considered adding the second 8877 to the 
> amp.  For one, I would much rather troubleshoot an amp with one tube, versus
> 
> two.
> 
> Paul, W9AC
> 
> 
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