[GreenKeys] Model 33 Teletype Restoration Update and Request for Part(s)

[Jones, Douglas W]

On Aug 4, 2015, at 4:07 PM, Don Robert House K9TTY wrote:

> In your quest for terminals I suggest you pass on the GE Terminet.  The power supply could easily kill you.

But the Terminet was a beautiful machine!  When printing at full speed, it
sounded like a creeky porch swing, and the print quality was great compared
to any other printer I know of from that era that could handle 120 characters
per second.

What's so threatening about the power supply (other than the usual hassle of
reforming capacitors that may well have been idle for decades).  I've reformed
capacitors.  See:

-- http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/bugs.shtml#10

For a log describing how I reformed the capacitors in a classic DEC PDP-8 that
was last plugged in (prior to this year) in around 1978.  I reformed the
capacitors at a very low trickle of current over a fairly long time, and all
but one of them now seem to be sound -- the one was replaced.

I also replaced the PCB-laden oil filled capacitor used in the resonant
circuit of the power supply.  These have a reputation for exploding so
there's really no point in trying to nurse them back to life.

		Doug Jones
		jones at cs.uiowa.edu