[GreenKeys] Looking For Bits

[Ralph Mowery]

As long as you get perfect print, there is no reason to go to a high voltage.

There are two reasons I know of to go to a higher voltage.

1.  The older equipment like the modle 15 needs it to keep the oil and dust burnt off the keyboard contacts.

2.  If there is enough inductance (coils) in the circuit, the selector will not operate fast enough.  This is mostly important on radio circuits where there are lots of things to upset the timming already.  The 70 volts should be plenty in your case.


  ----- Original Message ----- 
  From: Keelan Lightfoot 
  To: Green Keys 
  Sent: Saturday, August 27, 2011 11:14 PM
  Subject: Re: [GreenKeys] Looking For Bits


  This made me think of a more general question... My current loop supply outputs somewhere around 70 VDC; is there any need to go to 135 VDC when I'm running only local loops? As I understand it, the high voltage was needed to overcome the adverse electrical characteristics of a long loop.

  The only anecdotal evidence I can provide is that my M28 and M32 both seem more than happy operating on a 70 volt loop.

  - Keelan