On Mon, Jul 17, 2017 at 7:56 PM, shadoooo via cctalk
<[email protected]> wrote:
> Hello Tony,
> I read you have an R80 for 730.
> I have such machine, unfortunately the 80 is broken, I suppose the HDA is
> gone.
> The belt is also almost gone.
> That's why I would really like to find replacements.

Alas the belt is one thing that is missing from my R80, so I was planning
on using the RA80 belt. And I am not sure about the condition of either
HDA (the original R80 one or the one in the RA80) but as that's about the
only part I can't repair I do want to keep both so as to have as many
spares as possible.

So I don't think I can be any help.


> I probably don't need the servo card (I hope it's not broken), so if Greg
> takes the board, I would really like to buy from you at least the main
> mechanical parts.

Since the printset for the R80 (and that for the RA80, actually) is on
bitsavers, surely any electronic fault can be repaired. There are custom
ROMs on the the logic boards but apart from that it's all standard.

A bit of history of my unit...

I dismantled the R80 to move it and never put it back together. I did have
all the parts properly stored. Alas the box containing the screws,
ribbon cables, gas strut brackets, etc go lost in a house-move, the
chassis, HDA, motor, PSU, PCBs, etc all made it.

A friend of mine, downsizing his collection, gave me an untested RA80.
I mentioned this on the list about a year ago. My intention (not done yet)
is to strip the RA80, use the brackets (the hardest bit to make), screws
(not easy to get in the UK and some are special anyway, like the upper
chassis hinges) and cables (trivial to make, but why bother) to rebuild
the R80.

I have mentally divided the RA80 parts into 4 subsets :

1) Bits I need (see above, along with the HDA)
2) Bits I could use as spares but would be prepared to part with if somebody
needs them (PSU, spindle motor, processor board [1], R/W board, servo
board.
3) Bits that I don't need but are not hard to store (personality board and
its external cabling, front panel switch board)
4) Bits that I don't need and are a pain to store so may well get scrapped
(chassis)

[1] The processor board is the same in the R80 and RA80 other than the
ROMs (some of which are 8755 ROM/IO chips). So it's a good source
of componets for the R80.

-tony

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