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Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 00:06
by HigashiJun
rubber_jonnie wrote: 23 Apr 2026 14:23
So, as described in the GitHub repo, with this display board the 7805 runs quite hot, even with the 7805 bolted down, so I am going to replace it with a Traco I think and we'll see how that gets on.
TRACOs are really good. Never had issues with them.
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 08:13
by rubber_jonnie
HigashiJun wrote: 24 Apr 2026 00:06
rubber_jonnie wrote: 23 Apr 2026 14:23
So, as described in the GitHub repo, with this display board the 7805 runs quite hot, even with the 7805 bolted down, so I am going to replace it with a Traco I think and we'll see how that gets on.
TRACOs are really good. Never had issues with them.
They're very good, I run them in my 48k Spectrums and my Science of Cambridge MK14 also has one too, very cool running indeed.
I ordered some last night as annoyingly I'd run out. That's happened a lot lately.
I put the thermal camera on the 7805 yesterday after about 10 minutes and it was already hitting 60C+ and while that's well within the spec for a 7805, I'm sure a Traco will do a lot better.
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 09:17
by HigashiJun
rubber_jonnie wrote: 24 Apr 2026 08:13
I'm sure a Traco will do a lot better.
For sure it will !
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 09:41
by rubber_jonnie
HigashiJun wrote: 24 Apr 2026 09:17
rubber_jonnie wrote: 24 Apr 2026 08:13
I'm sure a Traco will do a lot better.
For sure it will !
Looks like they may be out for delivery this afternoon, so fingers crossed the upgrade will be completed soon :)
Next I need a source of 86 pin expansion sockets if I'm going to consider upgrading it :)
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 11:09
by HigashiJun
rubber_jonnie wrote: 24 Apr 2026 09:41
Next I need a source of 86 pin expansion sockets if I'm going to consider upgrading it :)
That's the toughest part...
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 11:12
by rubber_jonnie
HigashiJun wrote: 24 Apr 2026 11:09
rubber_jonnie wrote: 24 Apr 2026 09:41
Next I need a source of 86 pin expansion sockets if I'm going to consider upgrading it :)
That's the toughest part...
You're not wrong, even Ali Express is proving difficult.
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 11:26
by HigashiJun
I've found some here:
https://wakamatsu.biz/products/detail/450742
Wakamatsu is one of my favourite supplier here in Japan.
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 12:03
by HigashiJun
And you can have some on Evil Bay too:
https://www.ebay.com/itm/192716176588
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 12:18
by rubber_jonnie
@HigashiJun Thanks for thse, but I have 4 expansion slots and that seems rather expensive...
In other news I had a package arrive today that was supposed to have the 4014 and 4040 in it for the CDP1861 remake. It contained 2 4014's. Not best pleased.
Re: It's long overdue - Cosmac Elf II build
Posted: 24 Apr 2026 12:51
by HigashiJun
rubber_jonnie wrote: 24 Apr 2026 12:18
@HigashiJun Thanks for thse, but I have 4 expansion slots and that seems rather expensive...
In other news I had a package arrive today that was supposed to have the 4014 and 4040 in it for the CDP1861 remake. It contained 2 4014's. Not best pleased.
:(
Sorry to hear that.
And yes, EOL parts tend to become increasingly expensive...