[Amps] New Amps at Dayton

[Roger (K8RI)]

Bob Maser wrote:
> The same socket is used for the 4CX1000A and the 4CX1500B(p/n 
> SK800B).  The 4CX1500A uses a different socket(SK831). Increasing the 
> screen voltage does wonders for output.  That is how owners of the 
> 30S1 were able to improve performance.
>
That makes sense. The ones I had must have been the A version as they 
used a conventional type socket. It's been almost 20 years which is a 
good memory test. Now if we could still get the 4CX1600B which I believe 
is the one Alpha was going to use in their 6-meter amp.  I called to 
order one (The Alpha 6-meter Amp), they didn't have any tubes in stock, 
and would let me know when they got some in. A month or so later the amp 
was no longer offered. I think the ARRL Handbook still lists projects 
using that tube.

Bout 20 years ago I was inactive (no time), very busy (in college full 
time), and no hope of getting back into building that I could see so I 
sold off all my parts. Really cleaned house.  Now that I've been retired 
over 11 years I'd sure like to have some of those parts back and 
particularly those 4CX1500s and other tubes.
> Bob
As to tuning and grid current, if the mistake can be made I'm most 
likely the one who can make it. Hence my desire for rugged tubes. <:-)) 
Or...solid state with lots of good protection circuits.


Thanks for the update,

Roger (K8RI)