[Amps] Rotary switch terminology

[Jim Thomson]

Date: Mon, 27 Nov 2017 09:13:25 +0300
From: Martin Sole <hs0zed at gmail.com>
To: amps at contesting.com
Subject: [Amps] Rotary switch terminology

<Looking for help on naming of switch types.

In the field of rotary switches

If the pole rotates between contacts in a break before make manner how 
would you name this?

###  called a ... make before break  switch.  These type have maximum break down
V between adjacent contacts. 





If the pole rotates in a make before break manner how would you name this?
##  Called a ....  make before break switch.  These type have the least breakdown
V between  adjacent contacts.  




Now the one that has me puzzled, If all the switchable contacts are 
connected to the pole contact with the exception of the selected 
position, how would you call this?

##  Hams call that a ... shorting type  switch.  switch makers like 
multi-tech industries calls them ....   a multiple pole rotor.  Instead of one
rotor, there will be several rotors, like spokes..all connected to a central hub. 
In extreme  rare cases,  some will use a solid disc, with a single notch  cut out, this
amounts to the same thing.   Some will depict in the schematic  a solid disc, with a 
notch cut out, but the actual switch is a multiple pole rotor. 

##  If specifying a multiple pole rotor it has to be done exactly.    U cant use too may rotors,
and u cant  use too few.   On my multi-tech industries model 88  switches, they were originally 
single pole rotor types.   10 position switch  with  36 deg indexing.   After the 5 pole  sequential rotors installed,
only 6 useable switch positions remain.   IE: when  switch is on 10M position, the other 4 x  rotors are sitting on the
15, 20,40, 80m positions.   This is on a 10-15-20-40-80-160m,  6 band amp.  Draw it out carefully on paper, twice, 
once for the lowest band, then again for the highest band. 

Jim   VE7RF   




Thanks

Martin, HS0ZED