Issue 1 80K Spectrum
Here's the other Spectrum I acquired last weekend. It's an Issue 1 with an ELR SP80 daughterboard
It's a shame, but this machine doesn't power up and I don't have any other Issue 1's to test that the SP80 is working.
I'm happy for the daughterboard picture to be used in the SP80 Infoseek entry :)
...and can we have one of the two of you together?...
It's a shame, but this machine doesn't power up and I don't have any other Issue 1's to test that the SP80 is working.
I'm happy for the daughterboard picture to be used in the SP80 Infoseek entry :)
...and can we have one of the two of you together?...
Post edited by jp on
Comments
Ahem, judging by it's appearance the D15 diode (underneath the heatsink) is cooked...
It should be quite a sinple fix as Winston has pointed out, sibce the issue 1 board is so much simpler than the issue 2+, there's far less to go wrong :)
Let me know if you need some hard to get bit to fix it, Imay have it here. I don't have many of my spares available to me right now, but you never know :)
That could get hit on the keys!
Nice line of ICs along to top too. Wow.!
First point of call would be to get a multimeter across the voltage regulator to check if its getting volts and if its putting any out.
Devices that do nadda are often simple fixes, the 1st rule of electronics is to check the power supply, the second rule is to check it again.
Erm, I purchased it a part of a collection...
Issue 1 80k (boxed with 1st editions of manual and introduction)
Issue 2 80k
Interface 1 (Issue 1)
2x Microdrives
ZX Printer (boxed)
A shedload of microdrive cartridges (Spectrum and QL software)
Books and manuals
...for NZD $423.55 (including shipping) - so that's roughly GBP ?155.
That might seem steep, but it's not often you see all that together on this side of the hemisphere.
Nearly forgot to mention that a ZX80 was also included ;)
Or are you kidding us?
Then you definitely got a good deal...
Frans.
Seriously, I'm not kidding... there's also a ZX80. I don't know if it works yet as the PSU was missing. I've got a replacement being delivered over Christmas so there's something more for me to fiddle about with during the holidays.
Never even seen an Issue 1, let alone a ZX80. What condition is the Z80 case? Its paper thin plastic from what I have heard, have seen a number of very yellow Z80s on ebay which have the corners knocked off.
By the way JP - that CD arrived on Friday, many thanks for that. Good timing too, my amp and speakers arrived from the UK last week, which paired with my NZ$61 trademe Arcam CD player (was faulty, isn't anymore ;) ) sounds amazing.
You don't see many Zx80's for sale in NZ, that is the one model which I do not have.
Cheers Jon
There is some discolouration of the case, a few dinks in the plastic and some case parts missing: the ZX81 keyboard overlay, the 2x foam feet, 2x "W" buttons to hold the board to the case, 1x keyboard rivet. The 5x rivets to hold the case together have been replaced with screws, washers and nuts.
Here's some shots of the board, IC2, and the upper case.
I'm just pleased that it powered up :)
Not sure if it works or not but from the pic at least it looks mint.
Can't wait for it too arrive.
Nice. I too have a ZX80, but I'm too afraid to open it and can't remember how to check for a rom version. By the looks of the system font it does look like the original ZX80. I also have the Microace clone but never tested it.
It's a shame that there's not a lot of software for it online, and the few people who have ZX80's websites have not preserved the software that they have.
If you ever have a chance, read the 'Sync' magazines from the archive. There will find amazing projects and things that were being done with ZX80's long ago. One guy even described how he used his ZX80 to go "online".
It's got it's original polystyrene packaging.
Case is yellowed a bit.
ROM looks original stamped "ROM contents copyright 1980 Sinclair Research Ltd"
Zilog Z80A CPU
No modulator? Video out?
PSU is in bits. Circuit board is cracked. Pretty sure its not original as it's made by Teerad and is only 6v 450ma. Isn't the ZX80 9V? Will a ZX81 PSU work?
That all sounds pretty good
Erm, should be here as per yer photo
A normal Spectrum aerial lead will work OK. The ZX80 shouldn't be generating a composite video signal so probably best to tune in on an old tube TV.
I grabbed a digitor AC International Adapator from Dick Smiths for $33. It's switchable and comes with a bunch of adapters. I set the voltage at 7.5V - which works like a charm. Make sure you've got the correct adapter and you've set the polarity right though!
Yeah I was wondering if it produced a composite video out as there is no modulator (Markings on circuit board for one).
I've got a selectable power supply I used for a ZX81 so will try that. Just got to get an adaptor for the TV Out (Can't remember what that style is called). Hopefully Dick Smith has something if not Jaycar might.
Can you post a photo? Wouldn't mind seeing the condition of the board...
Blimey!, don't quote me on this, but perhaps it is kicking out a composite signal...
The plug on the back is a PL259. Dick Smith sell adaptors too BNC and I can go to RCA from that.
I'm starting to think this was a kitset as there is no sign that the modulator was removed.
Might be a composite output you got there.
Why not just try it and see what happens ?
You won't destroy anything if it turns out to be RF anyway.
Let us [i.e. WOS] know how you get on with it, I really do hope it's a runner as I think you've got something pretty special there.
I totally agree that it does look like a kit set - as you say, there's no sign the modulator was ever removed as the underside of the board looks really clean.
No doubt will see you at the next TM auction - for a white 16K rampack! ... :)
It works perfectly using 7.5v. Composite video signal out of the PL259. All keys work as well.
Only issue is with the placement of the PL259, I cannot plug anything into the cartridge slot as it is blocked by it.
I feel like when my dad brought home my first ZX81.
I may look at replacing the PL259 with a RCA socket but have real issues even thinking about modifying anything.