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Re: Today I received.....

Posted: Sat Sep 09, 2017 8:43 pm
by danielj
Yes! You might need a new membrane though.

Re: Today I received.....

Posted: Sat Sep 09, 2017 9:22 pm
by Lardo Boffin
danielj wrote:Yes! You might need a new membrane though.


Quite likely although it looks to be intact. I will probably go with new caps and a modern power reg as well. And a ZX8-CCB composite mod... Maybe 16k of on board RAM :D

Re: Today I received.....

Posted: Sat Sep 09, 2017 9:25 pm
by danielj
Just crack on with the full 64k if you're going on-board.

d.

Re: Today I received.....

Posted: Sat Sep 09, 2017 9:48 pm
by Lardo Boffin
danielj wrote:Just crack on with the full 64k if you're going on-board.

d.


I've never done 64k - just 16! Would be interested to see how that works.

Re: Today I received.....

Posted: Sat Sep 09, 2017 11:43 pm
by error
Just my opinion, but I don't think you should build it :shock:

Complete ZX81s are so common, and such an easy build with low component count, it would instantly lose most of its curiosity / collectibility / monetary value once built. As you say, it's hard to find the kit for the reasonable price - but its incredibly easy to find one that's been built for a low price.

Sure, you would get some value out of the fun of building it, but there are tons of other electronic kits out there including the many variations of ZX80 / Spectrum clones if you want a project - as I say, just IMHO... you cannot restore it back to an unbuilt ZX81 but there is an endless supply of built systems. Once built, yours becomes Just Another ZX81, indistinguishable from any other £20 eBay jobbie 8)

Ironically, if it was a really rare system to begin with, I would say it would be worth building - since there would be no other way to own X system.

But why listen to me, there is nothing particularly logical about vintage computing as a hobby in general. If you get a kick out of it, do it. I wouldn't but I'm boring :D :lol:

Re: Today I received.....

Posted: Sun Sep 10, 2017 8:10 am
by Lardo Boffin
I wondered if this one would divide opinion.

I can understand the desires for keeping an unbuilt kit as just that but then what do you do with it? I could get a nice frame and put it in but it seems a sad waste to me.

Too often I see in eBay 'This belong to my late husband : father / father in law / grandad - I have no idea what it is and so am selling it as not working. Otherwise it goes in the bin'.

I will of course try to get my kids interested in these but ultimately when I won't reboot in the morning this will go to someone else and it may be that no one cares about them then. It will never have been built and used and may end up being recycled or worse. :cry:

For me it's not about the building of it. I refurbish enough of these not to have had that itch scratched. I no longer have any of the computers I had as a kid. The ZX81 was sold to put funds towards the Spectrum. The Spectrum was sold to help pay for the Beeb etc. To actually have a ZX81 that has never been used before (rather than one sold as having never been used - because who knows?) will be as close to getting a new one from a shop as it is possible to get. It will be MY ZX81. Not a second hand one that someone else built or bought. I certainly won't be selling it I will be using it. :D

Re: Today I received.....

Posted: Sun Sep 10, 2017 8:26 am
by jonb
I would not build it.

My first computer was a ZX81 in kit form. It took me 3 hours to build - so that is all the gratification you'll get for the huge loss in value that building it would entail.

On the other hand: we all prefer retro computers to be used instead of languishing in some "collection" somewhere. So, if you would actually use the little guy for something interesting... :)

Re: Today I received.....

Posted: Sun Sep 10, 2017 8:57 am
by Lardo Boffin
jonb wrote:I would not build it.

My first computer was a ZX81 in kit form. It took me 3 hours to build - so that is all the gratification you'll get for the huge loss in value that building it would entail.

On the other hand: we all prefer retro computers to be used instead of languishing in some "collection" somewhere. So, if you would actually use the little guy for something interesting... :)


I'm not building it for the pleasure of building one or being able to say I have. I am building it so I have a computer that feels like it is mine. Kind of hard to explain!

I will be using it - my every day zeddy is a little poorly so this is ideally timed! I'm not sure about interesting but it will be used.

I recently bought a ZX Chroma which coupled with my ZXpand with AY (colour and sound from a zeddy) makes this a very usable computer! Well, with a better keyboard... But I have one I can stick on it.

Re: Today I received.....

Posted: Sun Sep 10, 2017 9:18 am
by leenew
Lardo, I think you have explained yourself very well.
It isn't *always* about the money, or the investment.
Build it and enjoy your ZX81. =D>
Having said that... I wouldn't build it :lol:

Lee.

Re: Today I received.....

Posted: Sun Sep 10, 2017 12:19 pm
by danielj
It's yours, you can do whatever you want with it :D So long as you're enjoying it, that's the main thing (if you'd broken into a museum and destroyed the last remaining ZX81 kit, then I might have a different opinion) :D

Although, if you want to go through the building a machine that feels like yours, and want to hang on to the kit, I heartily recommend a Harlequin 128! :)

http://www.sellmyretro.com/offer/details/25385

d.

Re: Today I received.....

Posted: Sun Sep 10, 2017 12:49 pm
by Lardo Boffin
danielj wrote:(if you'd broken into a museum and destroyed the last remaining ZX81 kit, then I might have a different opinion) :D

d.

I didn't do it.
Nobody saw me.
You can't prove a thing!

I think the other unbuilt kits out there are safe for the future!

https://m.ebay.co.uk/itm/122684360126

Re: Today I received.....

Posted: Sun Sep 10, 2017 1:16 pm
by 1024MAK
Lardo Boffin wrote:I think the other unbuilt kits out there are safe for the future!

https://m.ebay.co.uk/itm/122684360126

:shock:
I think that's in the wrong thread :lol:

At that price, if you could sell ten to twenty, you could make new kits (with dodgy "remarked" ULAs, Z80's etc)...

Mark

Re: Today I received.....

Posted: Sun Sep 10, 2017 3:57 pm
by 1024MAK
Lardo Boffin wrote:I'm not building it for the pleasure of building one or being able to say I have. I am building it so I have a computer that feels like it is mine. Kind of hard to explain!

:arrow: Hang on! :!:

Before you murder a "brand new" ZX81 kit, there's the small matter of that poor ZX81 that you have broken :twisted:
You know, the one where you were trying to upgrade the poor thing from only having 1k bytes of RAM on board to a nice 16k bytes of on board RAM...

Mark

Re: Today I received.....

Posted: Sun Sep 10, 2017 5:59 pm
by Lardo Boffin
1024MAK wrote:
Lardo Boffin wrote:I'm not building it for the pleasure of building one or being able to say I have. I am building it so I have a computer that feels like it is mine. Kind of hard to explain!

:arrow: Hang on! :!:

Before you murder a "brand new" ZX81 kit, there's the small matter of that poor ZX81 that you have broken :twisted:
You know, the one where you were trying to upgrade the poor thing from only having 1k bytes of RAM on board to a nice 16k bytes of on board RAM...

Mark


On Sinclair ZX World I used the phrase 'It's definitely going to get built. Whether I am brave enough remains to be seen'.
I am well aware of my blunder thanks! :oops: :oops: :oops:
It haunts my dreams and consumes my every waking moment. I wonder the world forlorn and adrift considering what I did wrong.
All in all - not good! :lol:

Re: Today I received.....

Posted: Mon Sep 11, 2017 6:46 am
by 1024MAK
Lardo Boffin wrote:On Sinclair ZX World I used the phrase 'It's definitely going to get built. Whether I am brave enough remains to be seen'.
I am well aware of my blunder thanks! :oops: :oops: :oops:
It haunts my dreams and consumes my every waking moment. I wonder the world forlorn and adrift considering what I did wrong.
All in all - not good! :lol:

Image
:mrgreen:

Mark

Re: Today I received.....

Posted: Wed Sep 13, 2017 7:50 pm
by danielj
Another element in my collection of ancient test equipment (that is actually useful) :)

DSC_2923.JPG


Thank you for the sig-gen Chris :)

d.

Re: Today I received.....

Posted: Wed Sep 13, 2017 8:57 pm
by flaxcottage
Snap! :lol:

Re: Today I received.....

Posted: Thu Sep 14, 2017 5:55 pm
by davidb
... an MGC case and manual! (I already had the PCB.)
Image
Now I can free up the case I was using for it, though I don't think we have a shortage of cases here! :lol:

Thanks, DaveH! :D

Re: Today I received.....

Posted: Fri Sep 15, 2017 8:27 pm
by andy rea
low capacity sd cards, second hand but appear to work, ideal for retro stuff of course...
Image

Andy

Re: Today I received.....

Posted: Mon Sep 18, 2017 12:04 pm
by Lardo Boffin
A book for when my little one is not so little.

IMG_6926.JPG


Good to see they chose the right computers! :lol:

Re: Today I received.....

Posted: Tue Sep 19, 2017 1:07 pm
by 1024MAK
So yesterday, two packets arrived.

Thanks to Rob for the VideoNuLA board =D>

The other item was a small and cheap multimeter from eBay:-
IMG_5298.JPG
AN8008 multimeter front view 1

IMG_5297.JPG
AN8008 multimeter front view 2

IMG_5308.JPG
AN8008 multimeter inside 1

IMG_5302.JPG
AN8008 multimeter inside 2

IMG_5301.JPG
AN8008 multimeter inside 3

IMG_5300.JPG
AN8008 multimeter inside 4

IMG_5299.JPG
AN8008 multimeter inside 5


It has the smallest cartridge fuses I have ever seen in a meter :shock:

Also taking into account the track spacing, not really suitable for voltages of 100V or greater [-X
Fine for use on voltages below this (which is what I will use it for). Just watch out for the trap. The main frequency range is only for low voltage use (not that they say what voltages it is safe to use on mind). If you want to measure the frequency of higher voltages, you should use the AC voltage range and press the button to select frequency [-X

I've not had time to compare it's readings to a well specified multimeter yet.

Mark

Re: Today I received.....

Posted: Tue Sep 19, 2017 1:59 pm
by jonb
I'm surprised you'd bother with an ElCheapo thing like that, Mark. Surely you have an Avo or something similar in your workshop?

Re: Today I received.....

Posted: Tue Sep 19, 2017 5:02 pm
by 1024MAK
:lol:

For £14.16 I could not resist...

See a review here :wink:

Most of my other meters are pictured here and there are close ups in a later post in this thread :D

I also have some analogue meters (sorry no photos yet) and at work I have an expensive Fluke meter.

Mark

Re: Today I received.....

Posted: Tue Sep 19, 2017 8:09 pm
by cmorley
The newish cheaper flukes which were originally destined for the Asian market are pretty good value. I bought a Fluke 17B+ for around £90 IIRC and I've been very pleased with it.

Re: Today I received.....

Posted: Wed Sep 20, 2017 6:41 am
by paulv
An IFEL 4-way backplane for the A300 series that was advertised as NOS from Norway. It definitely looks like it's never been used :D

Paul

Re: Today I received.....

Posted: Wed Sep 20, 2017 7:03 pm
by danielj
Yesterday I received Trixter's GBS8200.

It no longer does sparklies:
DSC_2925.JPG

DSC_2926.JPG


Weeeee!

d.

Re: Today I received.....

Posted: Wed Sep 20, 2017 10:07 pm
by 1024MAK
What! You've removed the fairy dust, you bad boy [-X

What will the pixies play with now?

Takes all the sparkle out. And on the lead-up to Christmas as well...

Mark

Re: Today I received.....

Posted: Thu Sep 21, 2017 3:46 pm
by robheaton
Not quite today, but earlier this week a very large parcel from Vanpeebles arrived...

pic.jpg

master.jpg

copro.jpg


BBC Master 512K with internal 80186 co-pro & an external Cambridge co-pro!!
Plus several boxes of floppies.

Roll on playtime at the weekend :D

Re: Today I received.....

Posted: Thu Sep 21, 2017 4:35 pm
by Lardo Boffin
Wow. :mrgreen:

Re: Today I received.....

Posted: Thu Sep 21, 2017 5:55 pm
by RobC
robheaton wrote:BBC Master 512K with internal 80186 co-pro & an external Cambridge co-pro!!

If you've got an IDE/CF interface, I have a hard drive image that has DOS, GEM and Panos installed.