Search found 2584 matches

by jonb
Fri Jan 17, 2020 11:06 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 18
Views: 337

Re: Which soldering iron?

+1 for the Hakko. Although mine seems to have a temperamental plug at the moment. Why they chose a DIN plug to connect the iron to the station is beyond me. The other thing is the solder. I use NOS Kester 60/40 rosin cored solder (that is, the "old fashioned" stuff) and it flows way better than mode...
by jonb
Thu Jan 16, 2020 2:44 pm
Forum: for sale / freebies
Topic: Free to collector Archimedes swag
Replies: 25
Views: 1678

Re: Free to collector Archimedes swag

No, I am trying to avoid the hassle of boxing them up, so collection only for now
by jonb
Wed Jan 15, 2020 5:14 pm
Forum: for sale / freebies
Topic: Free to collector Archimedes swag
Replies: 25
Views: 1678

Re: Free to collector Archimedes swag

Yes looks like it. I found the manual - I expect the disks are floating around somewhere.

Also have a PC emulator here, as well as a bunch of other odds and sods.

Please, someone come and take it off my hands!
by jonb
Wed Jan 15, 2020 2:54 pm
Forum: for sale / freebies
Topic: Free to collector Archimedes swag
Replies: 25
Views: 1678

Re: Free to collector Archimedes swag

Yes, I will PM you the address.
by jonb
Wed Jan 15, 2020 12:41 pm
Forum: for sale / freebies
Topic: Free to collector Archimedes swag
Replies: 25
Views: 1678

Re: Free to collector

Apart from the Arthur ROMs, the rest of this mini haul is still up for grabs, as of today (15th Jan 2020)!

Come on Archimedes fans, one of you must want this stuff!
by jonb
Wed Jan 15, 2020 11:50 am
Forum: for sale / freebies
Topic: Free to collector: Microvitec CUB 451 monitor
Replies: 11
Views: 958

Re: Free to collector: Microvitec CUB 451 monitor

This monitor is still available...!
by jonb
Sun Dec 22, 2019 12:51 pm
Forum: general
Topic: Today I received.....
Replies: 5600
Views: 466005

Re: Today I received.....

Oh gawd, I'd best switch back to working on the 6128 uIDE-16 drivers then... Mark, has anyone done anything with the uIDE-16 that you know of? I supplied them to a few CPCWiki guys.
by jonb
Sat Dec 21, 2019 11:51 am
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

Now for an update. I reassembled the thing having had no success with the replacement display - in fact, it is worse than when I pictured it. I am waiting for a spare keyboard from the same very generous fellow; then I might be able to initialise it. I did try doing the CTRL-@ initialisation again a...
by jonb
Mon Dec 16, 2019 5:08 pm
Forum: wanted
Topic: WANTED Epson HX-20 Display Module
Replies: 0
Views: 166

WANTED Epson HX-20 Display Module

HI

Has anyone got a spare HX-20 display module?

Cheers
JonB
IMG_6347.jpg
Front of unit
IMG_6346.jpg
Back of unit
by jonb
Sun Dec 15, 2019 3:04 pm
Forum: acorn atom and system
Topic: My Acorn Atoms
Replies: 22
Views: 511

Re: My Acorn Atoms

Oh I dunno, the little chopped up Atom looks kid of cute. Keyboard does, anyway.
by jonb
Thu Dec 12, 2019 8:59 am
Forum: for sale / freebies
Topic: New Finds from the Attic/Workshop - Taken : But now more
Replies: 7
Views: 535

Re: New Finds from the Attic/Workshop

Yes please Dave.

I'll PM you an address..
by jonb
Thu Dec 12, 2019 8:57 am
Forum: hardware
Topic: PLCC Chip Extractor
Replies: 9
Views: 506

Re: PLCC Chip Extractor

Gosh, there must be a lot of variance in the manufacturing of the cheap extractors. I have one and it's fine.
by jonb
Sun Dec 08, 2019 9:59 am
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

I said all options drop into the monitor. Screen is still bad but there is enough shown to see it’s in the monitor. It doesn’t look like there’s any special ROMs, so the other options showing are hard to explain. The screen hardware is faulty. This module was sent to me by someone and he said it has...
by jonb
Sat Dec 07, 2019 1:54 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

Well, I think I will have to do something about the keyboard first, as it cannot get into BASIC without a working "2" key..
by jonb
Fri Nov 29, 2019 1:49 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

Well I've been sort of lucky. A guy in the Netherlands sent me a replacement display module and I am seeing stuff on the screen. IMG_6325.jpg That is part of the menu. There are six options that come up, with every other line garbled. Each option when selected drops into the monitor, apart from the ...
by jonb
Tue Nov 26, 2019 2:09 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

Ohh hang on. I turned it on and got two beeps. Wiggling the display cable made the screen flicker. Nothing sensible displayed, just lines.
by jonb
Tue Nov 26, 2019 2:00 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Re: Another broken computer: Epson HX-20

Standard pitch as it turns out.


IMG_6320.jpg


It's still dead. I need some technical docs for it. Maybe the battery is so depleted it is unable to hold any charge at all.
by jonb
Tue Nov 26, 2019 12:14 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 726

Another broken computer: Epson HX-20

Hi Just got one of those HX-20s from a well known auction site , "untested". I've opened it up and I can see why, now. The NiCD battery has leaked and the display and cassette ribbon cables are eaten away. Question is, how viable is it to repair? Ideally I'd be looking for spares, but I could just w...
by jonb
Thu Nov 21, 2019 7:32 pm
Forum: general
Topic: Today I received.....
Replies: 5600
Views: 466005

Re: Today I received.....

Too late I expect. Haven’t opened it up yet..
by jonb
Thu Nov 21, 2019 1:05 pm
Forum: general
Topic: Today I received.....
Replies: 5600
Views: 466005

Re: Today I received.....

I've had a bit of a break in the "retrocomputer collection" madness, until now. IMG_6311.jpg IMG_6312.jpg I wanted the HX-20 as it was one of the first machines I wrote commercial software for. All three of them are sold as "untested" so basically parts only, but I think it is possible I can resurre...
by jonb
Wed Nov 06, 2019 8:33 pm
Forum: general
Topic: Today I received.....
Replies: 5600
Views: 466005

Re: Today I received.....

Happy days Mark.

I was a Psion registered developer. Designed and co-wrote Psion Accounts and Expenses. Not a big money spinner, we got 50 pence royalty per copy!
by jonb
Wed Nov 06, 2019 7:03 pm
Forum: general
Topic: Today I received.....
Replies: 5600
Views: 466005

Re: Today I received.....

Not just very similar. Exactly the same, bar the label. Brilliant machines.
by jonb
Sat Oct 26, 2019 9:46 am
Forum: off-topic
Topic: LOLPRICE
Replies: 2955
Views: 285220

Re: LOLPRICE

Elminster wrote:
Sat Oct 26, 2019 8:39 am
I had completely forgotten about that one. I had that back in the day, I ate a lot of weetabix and belonged to the weetabix club. Ah the memories of cutting out tokens from boxes and posting them off ......
You need neat wheat, mate!
by jonb
Tue Oct 22, 2019 2:31 pm
Forum: other vintage computer hardware, software and games
Topic: Tatung Einstein 256 Machine and Information Wanted
Replies: 23
Views: 873

Re: Tatung Einstein 256 Machine and Information Wanted

About Tattie Elite - It's a direct port of the Speccy version. Looks exactly the same.

By the way, I'm one of those heretics who prefers the Speccy version... as I spent many hours on it in my "yoof".
by jonb
Fri Oct 18, 2019 10:55 am
Forum: software & utilities for the pc, mac or unix
Topic: Greaseweazle - £2 disc archiver!
Replies: 9
Views: 1151

Re: Greaseweazle - £2 disc archiver!

Mind if I ask a couple of questions? What can you do with the file it generates? Can it be converted to a format readable by, say, cpmtools? Can the device write the images back (for creating boot disks from downloaded images, for example? Reason I ask is I was rather impressed by this : http://cowl...
by jonb
Sat Oct 12, 2019 11:22 am
Forum: off-topic
Topic: Advice request: optical solid state relays
Replies: 15
Views: 546

Re: Advice request: optical solid state relays

This is the protection circuit with 4x4700 16v banked capacitors. KCProtector.jpg I had a discussion with the author and he thinks 10,000uf might do it. He explained that the circuit works as I thought - caps charge on the low power let through by the 470R +68R resistors, then discharge when the clo...
by jonb
Fri Oct 11, 2019 12:44 pm
Forum: off-topic
Topic: Advice request: optical solid state relays
Replies: 15
Views: 546

Re: Advice request: optical solid state relays

The guy who designed the protection circuit posted another document (attached). I think this is a bit better, his waveforms show a 300v EMF spike after the solenoid is triggered. Maybe my scope setting is all wrong! He also clarified that it’s 16 millifarads or 160000uF. Blimey. I’ll experiment a bi...
by jonb
Fri Oct 11, 2019 8:43 am
Forum: off-topic
Topic: Advice request: optical solid state relays
Replies: 15
Views: 546

Re: Advice request: optical solid state relays

Mark, I'm going to try building the protection circuit that is shown in the document attached to the first post. The only thing I'm not sure about is the capacitor it uses to store energy to kick the solenoid when the battery runs low. I assume what the circuit does is to charge the cap while the cl...
by jonb
Thu Oct 10, 2019 8:24 pm
Forum: off-topic
Topic: Advice request: optical solid state relays
Replies: 15
Views: 546

Re: Advice request: optical solid state relays

The scope trace isn’t lying.

That was measured across the solenoid connections using single shot. It triggered when the solenoid fired. Have I misinterpreted it?
by jonb
Thu Oct 10, 2019 2:07 pm
Forum: off-topic
Topic: Advice request: optical solid state relays
Replies: 15
Views: 546

Re: Advice request: optical solid state relays

Mark, I updated the previous post with a description of the winding mechanism.

I measured the coil and it is 12.4 ohms but remember there's a 100 Ohm resistor wired across it. So the solenoid on its own should measure 14.15 Ohms.