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

[teletypeparts at comcast.net]

Yeah, we worked on just a few of these at WU.  The belt with the characters looked like little matchsticks out of a book of matches.  
Wayne 
KB1FDW 

----- Original Message -----

From: "Douglas W Jones" <douglas-w-jones at uiowa.edu> 
To: "GREENKEYS BULLETIN BOARD" <greenkeys at mailman.qth.net> 
Sent: Tuesday, August 4, 2015 5:48:27 PM 
Subject: Re: [GreenKeys] Model 33 Teletype Restoration Update and        Request        for Part(s) 

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 
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