Search found 280 matches

by McKlaud
Thu Jul 30, 2020 7:48 am
Forum: Hardware
Topic: Ferranti ULA 5C114E info?
Replies: 9
Views: 290

Re: Ferranti ULA 5C114E info?

Hi, Interesting findings. Anyway, in Europe PAL-B/G is used and its colour subcarrier frequency is 4.43361875 MHz. In case of PAL-N, the colour subcarrier frequency is 3.58205625 MHz and a channel bandwidth of 6MHz. So, PAL-N spec is very close to the NTSC spec, and it might be a reason why Sinclair...
by McKlaud
Tue Jun 02, 2020 8:16 am
Forum: Hardware
Topic: Zx81 (Ts1000) case technical drawings
Replies: 36
Views: 2799

Re: Zx81 (Ts1000) case technical drawings

They look great and well done.

Thanks for sharing.
by McKlaud
Wed May 27, 2020 12:10 pm
Forum: Hardware
Topic: TS2068 video output mod?
Replies: 10
Views: 623

Re: TS2068 video output mod?

I think your TS2068 provides good colours for NTSC standard. Do not expect anything similar to PAL, in NTSC all colours are washed out.

There a solution, a mini board with PAL encoder like AD724 that could be connected to the edge connector. R, G, B & video signals are available there.
by McKlaud
Fri May 15, 2020 11:32 am
Forum: ZX Spectrum Lounge
Topic: Photo of my TC-2048
Replies: 9
Views: 8874

Re: Photo of my TC-2048

TS2068 PAL
by McKlaud
Thu Mar 26, 2020 7:40 pm
Forum: Hardware
Topic: I started on my new ZX-81 replacement board (kit) ZX81+38
Replies: 25
Views: 13472

Re: I started on my new ZX-81 replacement board (kit) ZX81+38

Looks great and thank for sharing.
by McKlaud
Mon Mar 23, 2020 5:55 pm
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 86
Views: 37285

Re: Jupiter ACE (again)

Working from home these days and sorting out unfinished project in mean time. Sticker to my Jupiter ACE replica's keyboard finally done.
by McKlaud
Wed Mar 18, 2020 8:18 am
Forum: ZX Spectrum Lounge
Topic: Photo of my TC-2048
Replies: 9
Views: 8874

Re: Photo of my TC-2048

The hi-res schematic attached in the ZIP file.

Regarding Mark's query, any European TC2048 has got a UHF modulator which works on Channel 36. Timex used at least two makes of them, ASTEC UM1233 and Gintek UM-236E-1.

Image
by McKlaud
Sun Feb 23, 2020 8:23 am
Forum: ZX Spectrum Lounge
Topic: Photo of my TC-2048
Replies: 9
Views: 8874

Re: Photo of my TC-2048

Hi,

Your TC2048 looks nice and I like the bright and good looking keyboard.

Anyway, there could be an issue with the RF modulator if the composite output works fine. The most accurate schematic diagram of rev.5 attached.
by McKlaud
Sun Feb 16, 2020 10:06 am
Forum: Hardware
Topic: Superfo Cartridge Interface
Replies: 5
Views: 2143

Re: Superfo Cartridge Interface

No, they are not. It was not an open project. Please see SMR where superfo sells them. If can't find any, send me a PM, because I've got one spare PCB if you are interested.