Search found 1432 matches

by Lardo Boffin
Fri Mar 26, 2021 3:27 pm
Forum: Hardware
Topic: Composite mod issue: left side of screen missing - solved!
Replies: 64
Views: 3637

Re: Composite mod issue - left side of screen missing

I think the electrolytic caps only affect the reset circuit or similar so won’t have an affect. I have composite modded 30 or 40 zeddies and not seen that with the left border but then I have always used the ZX8-CCB. Superb bit of kit. I have on occasion seen some ‘almost colour’ on the screen befor...
by Lardo Boffin
Sat Mar 20, 2021 2:45 pm
Forum: Hardware
Topic: ZX81 Letters
Replies: 15
Views: 4788

Re: ZX81 Letters

I use a very fine brush and model paint (can’t remember which one) and it looks pretty good. Admittedly I have had plenty of practice now! Give the existing surface a really good clean and get a large blob of paint (well large relative to the brush) and put it in the centre part of the letter you ar...
by Lardo Boffin
Tue Mar 16, 2021 8:36 am
Forum: Hardware
Topic: Spectrum 128K toastrack jail bars?
Replies: 17
Views: 2221

Re: Spectrum 128K toastrack jail bars?

Thanks Deano! Will have a play with the settings.
by Lardo Boffin
Fri Mar 12, 2021 8:33 am
Forum: Hardware
Topic: ZX Spectrum - recommended upgrades?
Replies: 17
Views: 1926

Re: ZX Spectrum - recommended upgrades?

The cap kit from Retroleum comes with some extra bits for the composite mod:

https://www.retroleum.co.uk/zx-spectrum-capacitors
by Lardo Boffin
Fri Mar 05, 2021 9:28 pm
Forum: Sinclair Misc
Topic: 40 years ago...
Replies: 7
Views: 1102

Re: 40 years ago...

Moggy wrote: Fri Mar 05, 2021 8:38 pm A toast also to Lardo whose most excellent refurbished zeddies will probably be around for another 40 years. :D

8-)

Just standing on the shoulders of giants.
by Lardo Boffin
Fri Mar 05, 2021 12:01 pm
Forum: Sinclair Misc
Topic: 40 years ago...
Replies: 7
Views: 1102

Re: 40 years ago...

Happy days!!!
by Lardo Boffin
Fri Feb 26, 2021 9:39 am
Forum: Hardware
Topic: Spectrum 128K toastrack jail bars?
Replies: 17
Views: 2221

Re: Spectrum 128K toastrack jail bars?

I think you have to replace all caps initially. Then replace C28 with a 47uF capacitor (original is 22uF, right of the 5 way keyboard connector) Replace caps C7 and C8 with 1uF ceramic capacitors (next to IC12 and IC13 RAM chips, bottom left of the board). You could also add 1uF caps underneath the...
by Lardo Boffin
Fri Feb 26, 2021 9:38 am
Forum: Hardware
Topic: Spectrum 128K toastrack jail bars?
Replies: 17
Views: 2221

Re: Spectrum 128K toastrack jail bars?

For jailbar reduction you could add caps to the memory chips.. https://youtu.be/R_E3eX3Gtas The vertical white lines was something I came across before, the RGB signal was too strong for the monitor, and I was able to adjust monitor settings to fix https://m.facebook.com/story/graphql_permalink/?gr...
by Lardo Boffin
Tue Feb 23, 2021 4:32 pm
Forum: Sinclair Misc
Topic: Over the top
Replies: 3
Views: 505

Re: Over the top

Does seem a ‘little’ (lot) excessive!
by Lardo Boffin
Mon Feb 22, 2021 5:16 pm
Forum: Hardware
Topic: New to repairing ZX's
Replies: 23
Views: 1593

Re: New to repairing ZX's

It will probably be worth cleaning the legs on the Mostek RAM - they always seem to tarnish badly.