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

[Mike Hatch]

> What I'm more worried about is a spare bulb - It's a "festoon" bulb
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.
>
> What I'm more worried about is a spare bulb - It's a "festoon" bulb
> (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
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>
> Ethan.Dicks at usap.gov 
> http://penguincentral.com/penguincentral.html
>
>