TS 1000 bad ULA?

General Chit Chat about Sinclair Computers and their Clones
User avatar
Andy Rea
Posts: 1267
Joined: Fri May 09, 2008 1:48 pm
Location: notts UK

Re: TS 1000 bad ULA?

Post by Andy Rea » Wed Oct 04, 2017 3:22 pm

Well just to ruffle the fur a bit more... the zeddy isn't entirely 'closed'... so sone heat does escape...

Just saying :mrgreen:
6 x ZX81, 1 x TS1500 , 1 x +3e, 1 x timex 2040 printer, 1 x timex 2020 cassette deck, siclair printer and some spectrum

User avatar
siggi
Posts: 760
Joined: Thu May 08, 2008 8:30 am
Location: Dauernheim, Germany
Contact:

Re: TS 1000 bad ULA?

Post by siggi » Wed Oct 04, 2017 3:42 pm

Andy Rea wrote:
Wed Oct 04, 2017 3:22 pm
Well just to ruffle the fur a bit more... the zeddy isn't entirely 'closed'... so sone heat does escape...

Just saying :mrgreen:
and due to its black case, it is nearly a perfect black radiator, able to emit a lot of energy as thermal radiation :mrgreen:
My ZX81 web-server: online since 2007
http://zx81-siggi.endoftheinternet.org/index.html

User avatar
1024MAK
Posts: 1779
Joined: Mon Sep 26, 2011 9:56 am
Location: Looking forward to summer in Somerset, UK...

Re: TS 1000 bad ULA?

Post by 1024MAK » Wed Oct 04, 2017 4:30 pm

siggi wrote:
Wed Oct 04, 2017 3:42 pm
Andy Rea wrote:
Wed Oct 04, 2017 3:22 pm
Well just to ruffle the fur a bit more... the zeddy isn't entirely 'closed'... so sone heat does escape...

Just saying :mrgreen:
and due to its black case, it is nearly a perfect black radiator, able to emit a lot of energy as thermal radiation :mrgreen:
Maybe, but the thermal conductivity of the ABS plastic is not exactly great...

A warm Zeddy does work nicely as a hand warmer. Just need two in winter, one for each hand :mrgreen:

Incidentally, if you have a fan in your machine and that results in a forced airflow over the ULA (and 7805 if you are still using a series voltage regulator), then the ULA does not need a heatsink...

Mark

gary2000
Posts: 10
Joined: Sun Jun 19, 2016 3:46 pm
Location: USA

Re: TS 1000 bad ULA?

Post by gary2000 » Sun Nov 05, 2017 1:44 pm

composite and 16k
Attachments
20171103_182439.jpg
20171103_182439.jpg (1.69 MiB) Viewed 103 times
20171103_180000.jpg
20171103_180000.jpg (1.57 MiB) Viewed 103 times

Post Reply

Who is online

Users browsing this forum: No registered users and 1 guest