[personal] Re: WTB: DEC PC04 Paper Tape Reader/Punch

That style lamp is still readily available over here (UK) as a car spare used usually for number plate lights, my Fiat uses them. What's the voltage ?, the available type are obviously 12V. I have a paper tape sensor head taken off a reader for an SDS9300 system, 8 track (5 sprocket 3), if its of any use. Best regards, Mike Hatch Web - www.soemtron.org Email - mike at soemtron.org Looking for a PDP-7 (some hope!) ----- Original Message ----- From: "Ethan Dicks" <ethan.dicks at usap.gov> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Sent: Monday, August 18, 2008 9:47 AM Subject: [personal] Re: WTB: DEC PC04 Paper Tape Reader/Punch > On Sun, Aug 17, 2008 at 02:00:02AM -0400, der Mouse wrote: >> >> Speaking of the PC-04 Paper Tape Reader/Punch, I have one for my PDP >> >> 8/e system, but one of the ten phototransistors in the monolithic >> >> array is shorted, making it pretty useless for reading tapes. >> > Read the tape, flip it upside down, read it again, flip the bits, >> > merge. >> >> I'm moderately sure that the paper tape I used back when I had a PDP-8 >> was not symmetric in the way needed here - the line of feed/timing >> holes was not on the centreline of the tape. > > You are remembering correctly - they are not. > > *But*, you could read the tape one way, flip it _and_ read it backwards. > Syncing up the two passes is just an exercise for the student ;-) > > Personally, my PC04 is the primary load device for one of my PDP-8/Ls. > I'd be hurting if I lost a phototransistor - the SMT idea sounds handy. > > (the kind commonly used for older automobile dome lights - it looks > like a large AGC-type glass fuse, with an axial filament), but trying > to cross it with a modern one from Osram or others has drawn a blank > for me. Has anyone found a modern substitute? > > -ethan > > > -- > Ethan Dicks, A-333-S Current South Pole Weather at 18-Aug-2008 at > 08:40 Z > South Pole Station > PSC 468 Box 400 Temp -81.8 F (-63.2 C) Windchill -126.1 F (-87.8 > C) > APO AP 96598 Wind 14.6 kts Grid 31 Barometer 668.9 mb (11050 > ft) > > Ethan.Dicks at usap.gov > http://penguincentral.com/penguincentral.html > >