Search found 100 matches

by balford
Mon Nov 20, 2017 11:37 pm
Forum: Hardware
Topic: Heat sink on Spectrum ULA - is there any benefit?
Replies: 16
Views: 2890

Re: Heat sink on Spectrum ULA - is there any benefit?

The only ULA's I would definitely either put a heatsink on, or limit their use, are the 6C001E-6 ones. I've come across a fair amount of these being faulty, and they've become colloquially known as 'suicide ULA's' by others too. Thanks. Which motherboard version do these tend to reside in? Issue 3 ...
by balford
Fri Nov 17, 2017 11:08 am
Forum: Hardware
Topic: Heat sink on Spectrum ULA - is there any benefit?
Replies: 16
Views: 2890

Re: Heat sink on Spectrum ULA - is there any benefit?

The only ULA's I would definitely either put a heatsink on, or limit their use, are the 6C001E-6 ones. I've come across a fair amount of these being faulty, and they've become colloquially known as 'suicide ULA's' by others too.
by balford
Mon Sep 18, 2017 2:10 pm
Forum: Hardware
Topic: ZX Printer Belts - Available Now (sort of)
Replies: 7
Views: 1448

Re: ZX Printer Belts - Available Now (sort of)

This is a most welcome development, and always good to have multiple sources on replacement parts.

I foresee a run on the old silver bogroll though :D

B
by balford
Sat Jun 10, 2017 6:44 pm
Forum: Hardware
Topic: Create ULA for €5?
Replies: 84
Views: 8824

Re: Create ULA for €5?

I'll take a couple also :)

B
by balford
Thu Jan 26, 2017 4:15 pm
Forum: Hardware
Topic: Sparkly pixels
Replies: 65
Views: 5783

Re: Sparkly pixels

That's the Australian version, you want to be ordering a UK-spec component :D

B
by balford
Sun Dec 18, 2016 11:26 pm
Forum: Hardware
Topic: zx spectrum 128K +2 (grey, issue 1) rgb problem
Replies: 6
Views: 1734

Re: zx spectrum 128K +2 (grey, issue 1) rgb problem

Must be broken, looks from the product description that it should do the job.

Just to check, are the probes plugged into the correct sockets (middle and bottom for voltage measurements)?

B
by balford
Sun Dec 18, 2016 2:37 pm
Forum: Hardware
Topic: zx spectrum 128K +2 (grey, issue 1) rgb problem
Replies: 6
Views: 1734

Re: zx spectrum 128K +2 (grey, issue 1) rgb problem

That's almost definitely TR8 and TR9 that have failed, since you get the same results over RF as well as RGB. On the Z70700 Issue 1 boards, TR4 and other transistors are the correct way around, although you do have to relocate C31 to remove the audio mix (this is only a problem if you're using compo...
by balford
Wed Dec 07, 2016 9:15 pm
Forum: Hardware
Topic: "Different" ZX81's
Replies: 190
Views: 16348

Re: "Different" ZX81's

*Waits for B to drop his US Issue 3 PCB out" :lol: Whoops, bit late :D Anyhow, here's my US Issue 3 (right) along with a UK Issue 3 (left, *slightly* modified): https://c2.staticflickr.com/6/5518/30649937604_08a3776628_b_d.jpg https://c2.staticflickr.com/6/5486/30682095873_9a1b92485a_b_d.jpg B
by balford
Tue Dec 06, 2016 1:58 pm
Forum: Hardware
Topic: "Different" ZX81's
Replies: 190
Views: 16348

Re: "Different" ZX81's

That would make perfect sense - the UK and USA Issue 1 PCB's were necessarily different, and I guess the Issue 3 was intended to be a 'universal' PCB with provision for extra components/shielding points required for the US market.

B
by balford
Sun Nov 27, 2016 6:16 pm
Forum: Hardware
Topic: ZX8-CCB vs ZXVid
Replies: 80
Views: 6879

Re: ZX8-CCB vs ZXVid

I agree about market viability, it's simply not realistic to install a ZXVid in an unboxed Zeddy that probably cost less than the ZXVid itself. The CCB I reckon is responsible for saving a huge amount of Zeddies from oblivion, as it's a fantastic cost-effective product (and would be at twice the pri...