Search found 2160 matches
- Fri Jul 02, 2021 9:32 pm
- Forum: Hardware
- Topic: How to troubleshoot a Sinclair ZX16K RAM Issue 3
- Replies: 24
- Views: 5783
Re: How to troubleshoot a Sinclair ZX16K RAM Issue 3
Not wishing to reignite the whole heat sink thing! Just curious what temperature they actually run at.
- Fri Jul 02, 2021 7:24 pm
- Forum: Hardware
- Topic: How to troubleshoot a Sinclair ZX16K RAM Issue 3
- Replies: 24
- Views: 5783
Re: How to troubleshoot a Sinclair ZX16K RAM Issue 3
A thermal camera? It would be interesting to see what temp a standard zeddy ULA gets to after being inside a case for a hour (switched on and running! )
- Fri Jul 02, 2021 3:47 pm
- Forum: Hardware
- Topic: K - then black screen
- Replies: 6
- Views: 1633
Re: K - then black screen
citizenfish wrote: ↑Fri Jul 02, 2021 12:50 pm Turned out this was a faulty composite mod. The board had been previously modded and looked a bit of a bodge. I replaced with a Rude dog Retros unit and now have a lovely clear K.
This ZX81 fixing is addictive. One more to go
- Thu Jun 17, 2021 8:47 am
- Forum: Welcome Area
- Topic: Greetings from London
- Replies: 2
- Views: 1214
Re: Greetings from London
Welcome. Its only a small step from emulators to a room full of zeddies!
- Sun Jun 13, 2021 12:59 pm
- Forum: SALES
- Topic: Sold - Issue one PCB working but with large heat sink on ULA
- Replies: 6
- Views: 3659
Re: Sold - Issue one PCB working but with large heat sink on ULA
This has now sold.
- Fri Jun 11, 2021 5:19 pm
- Forum: SALES
- Topic: Sold - Issue one PCB working but with large heat sink on ULA
- Replies: 6
- Views: 3659
- Fri Jun 11, 2021 4:15 pm
- Forum: SALES
- Topic: Sold - Issue one PCB working but with large heat sink on ULA
- Replies: 6
- Views: 3659
Sold - Issue one PCB working but with large heat sink on ULA
Hello all I have for sale a working issue one zeddy motherboard only, but the catch is that the ULA has a large heat sink attached which I doubt can be removed and won’t go in a standard case. I know some of us have zeddies in larger enclosures so it may be of use? It is working as shown - I have lo...
- Wed Jun 09, 2021 1:02 pm
- Forum: Welcome Area
- Topic: Hello from the Netherlands..
- Replies: 8
- Views: 3173
Re: Hello from the Netherlands..
Welcome on board.redhawk668 wrote: ↑Tue Jun 08, 2021 11:01 pm
For the ZX Spectrum 16/48K I designed an s-video board to replace the modulator, to provide dotcrawl free video output.
The dot crawl free board sounds interesting.
- Sun Jun 06, 2021 12:25 am
- Forum: Hardware
- Topic: ‘Tatung 81’ (ZX81 in a case)
- Replies: 29
- Views: 7803
Re: ‘Tatung 81’ (ZX81 in a case)
Thanks Mark. I transplanted my rebuilt zeddy inside and it works a treat. :D (still need to finish the switch on the ROM) Then I decided to put my ‘Spand inside. Nope…. 2D7FF549-AB06-4F0A-AA2D-339AEC1135DE.jpeg Going to hit the PSU. OK. Put back the IO expander and then mount it on that. FBC39433-72...
- Sat Jun 05, 2021 11:43 am
- Forum: Hardware
- Topic: 16K RAM Pack photos - please add yours
- Replies: 23
- Views: 10770
Re: JRS 16K RAM Pack
This is about the sixth design of ZX81 RAM pack that I have seen. Each one uses a different method or different variation of design for obtaining a -5V supply. Some use a transistor oscillator driving an inductor like the Sinclair 16k RAM pack. Some use a CMOS logic chip and capacitors to do it. So...