[ARC5] Why "Noodling" About Sweep Tubes

[Kenneth G. Gordon]

On 25 Oct 2013 at 18:14, Ian Wilson wrote:

> > 803's are another possibility but perhaps getting too bulky to
> > package this up and fit into the original location.
> > 
> > 73, ian K3IMW

803 is unusually tall. I really like them though. They are superbly reliable 
tubes.

I have a bunch here with ceramic bases....some of which I have had to 
re-glue with furnace cement.

I've always thought it odd that the 803 is a pentode while the 805 is a triode. 
Seems like it ought to be 'tother way around.

Also, I have never really been able to understand why 803 is termed a 
"beam-power pentode". AFAIK, it has no "beam forming" plates.

Ken W7EKB