RK05 head alignment -- how difficult?

Noel Chiappa jnc at mercury.lcs.mit.edu
Mon Jul 24 14:25:47 CDT 2017


    > From: Fritz Mueller

    > Perhaps it is time to find/train a younger apprentice :-)

'Yes, my master!' :-)


    > If anybody has a decent picture of a clean/fresh RK05 head, I would
    > appreciate seeing it

Here ya go:

  http://gunkies.org/wiki/File:RK05Head.jpg

That head (NOS) came out of a sealed plastic bag, so it should be in perfect
condition.

    > in particular, what should the "wings" near the record/erase gap look
    > like when clean and intact?

Not sure exactly what you're discussing here, but I took this image:

  http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/jpg/RK05HeadRefl.jpg

using reflected light; is that crucifix-shaped area of low reflection the
thing you're speaking of? It's only visible in reflected light, not direct
light; I'm not sure what it is, perhaps crystals oriented in a different
direction from the rest of the head?


    > It doesn't look like anything you'd want to try and fly a head over.

:-)

    > If there are reputable resources for fresh media that folks know about
    > I'd like to hear about that too!

Given that there is no use for these things now, I would guess that there are
no news ones, and the only hope would be NOS stuff - and I'd bet those are
incredibly rare.

	Noel


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