[Amps] Proof of idiocy

[HAROLD B MANDEL]

Many Jennings vacuum variables have this neat little
set screw in the top cap that stops the thread somewhere near
the end of it's travel.

Alpha used this to prevent tuning up on 10 meters in the
77dX days and one of the "allowed" 10 meter mod steps was
to crank this set screw out a few turns.

Hal
W4HBM
On Mon, 13 Mar 2006 23:03:30 -0500 "Will Matney" <craxd1 at verizon.net>
writes:
> Bill,
> 
> What I was thinking is that if that capacitor has an odd number, and 
> a counter an even, if you wanted to set the counter up to read 100 
> when the capacitor is fully meshed, or a 0 when fully out, it might 
> not be possible, and the counter would hit a stop at 100 making the 
> cap stop before it's fully meshed. If one wanted to set up a gear 
> train to do this, it would be impossible to do with stock gears, 
> sprockets, or timing belts. Plain belts though could be used with 
> the correct size pulleys. Now I mentioned earlier that a 20 and a 23 
> tooth gear/sprocket could be used but the problem here is a 23 tooth 
> gear is an odball size and non-standard. Most all stock gears off 
> the shelf are in even numbers and multiples of 10, 11, 12, and so on 
> in full numbers. When 23 is divided by 2, you cant get a whole 
> number from it so it would be the smallest makable. They go as low 
> as 10 but under that undercut of the tooth flanks is bad and they 
> dont recommend it. Most use multiples of 10 thru 20.
>   This because most gear trains are figured to come out on even 
> number ratios or rarely 1/2 numbers like 10-1/2 to 1. Another reason 
> is the center distances between shafts come out measurable in inches 
> by using standard sizes. An oddball size will give an oddball center 
> distance. A 23 tooth could be ordered, but again, that's an extra 
> cost. Anyhow, that would be a mess to get a dial to count correct 
> for the full mesh and unmesh.