Search found 265 matches

by dessony
Sat Sep 05, 2020 5:11 am
Forum: Hardware
Topic: ZX81 generates high pitched sound on CRT
Replies: 28
Views: 1443

Re: ZX81 generates high pitched sound on CRT

Mrtind,

Real cool to look at a few pictures of your monitor's CRT neck and its printed circuit board! However, how is your monitor's all of the electrolytic capacitors' health?

Cheers,
DesSony
by dessony
Fri Sep 04, 2020 4:44 pm
Forum: Hardware
Topic: ZX81 generates high pitched sound on CRT
Replies: 28
Views: 1443

Re: ZX81 generates high pitched sound on CRT

mrtinb, What are your monitor's brand name and its model number? We might find a schematic and troubleshoot a source of the noise. After opening your monitor's back case, a good chance that you will see these electrolytic capacitors' tops might be bulged or "dried" leaked from its bottoms. Cold or d...
by dessony
Fri Sep 04, 2020 2:37 am
Forum: Hardware
Topic: ZX81 generates high pitched sound on CRT
Replies: 28
Views: 1443

Re: ZX81 generates high pitched sound on CRT

To people who don't understand German, I just web-translated Tiger's message into English: [ Maybe you can understand German because unfortunately, I can't put it this way in English: In the case of tube devices (CRT), a line transformer is used in the high-voltage part, which generates a high volta...
by dessony
Wed Sep 02, 2020 9:54 pm
Forum: Hardware
Topic: ZX81 generates high pitched sound on CRT
Replies: 28
Views: 1443

Re: ZX81 generates high pitched sound on CRT

Mrtinb, It is a good chance that noise might come from an arcing cracked flyback transformer. To confirm it, dim your room light, turn on your monitor and check into the monitor's ventilation slots. If you see a blue arc dancing around the monitor's board then it clearly is a cracked flyback transfo...
by dessony
Sat Aug 15, 2020 1:14 pm
Forum: Hardware
Topic: CZ1500 ( TS1500 ) composite video mod done
Replies: 7
Views: 1310

Re: CZ1500 ( TS1500 ) composite video mod done

Mark (1024MAK) and the rest of you,

I found a website on a printed circuit board based on your video transistor buffer amplifier circuit design! :o Just take a look; http://jupiter-ace.co.uk/hardware-KF-video-board.html

Sincerely yours,
DesSony
by dessony
Sat Aug 15, 2020 12:53 pm
Forum: GAMES
Topic: 3D OXO Game
Replies: 1
Views: 1134

Re: 3D OXO Game

I found this game program from "Your Computer Magazine"; June 1984; pages 174 and 177. The magazine is based in the United Kingdom.

Cheers,
DesSony
by dessony
Sun Aug 02, 2020 11:16 pm
Forum: GAMES
Topic: 3D OXO Game
Replies: 1
Views: 1134

3D OXO Game

Hey everybody,

I just typed in a program from a magazine. I hope that you will enjoy this game! :lol:

Thank all of you very much in advance.

DesSony
3D OXO.zip
(10.92 KiB) Downloaded 54 times
by dessony
Sun Aug 02, 2020 11:10 pm
Forum: Hardware
Topic: CZ1500 ( TS1500 ) composite video mod done
Replies: 7
Views: 1310

Re: CZ1500 ( TS1500 ) composite video mod done

I concur with Mark (MAK1024)! Well done! :D Thumb up! You are welcomed!
by dessony
Thu Dec 12, 2019 9:36 pm
Forum: Welcome Area
Topic: Hello from Italy!
Replies: 3
Views: 1904

Re: Hello from Italy!

Welcome to these forums! You'll discover here about an RF video modulator change to the ZX81/TS1000.

DesSony
by dessony
Mon Dec 09, 2019 12:07 pm
Forum: Software
Topic: Hot ZII?
Replies: 26
Views: 8861

Re: Hot ZII?

English: Computer sound cable system hooking up problem clearly solved! Thanks! :D XavSnap, now, how do I determine the sound measuring level coming from our cassette recorders' ear sockets? Multimeter? Oscilloscope? I have both of these pieces of equipment here. What are the settings for these tool...