Subj : Re: C64 Refurb
To : All
From : Daniel
Date : Tue May 05 2020 08:57 am
On 5/4/20 4:25 PM, Computer Nerd Kev wrote:
I just happened to look at c.s.cbm when I saw this reply. Just so you
know, there is a one-way exchange between fidonet and this newsgroup so,
while I posted this on fidonet, your reply never made it to me. And
other than the reply-to address, BBS fidonet gateway information is
stripped from my original post so you have no way of knowing that the OP
comes from a BBS. I believe they used to have two-way communication I
figure they disabled it due to increased SPAM issues during usenet's
heyday. If I hadn't inadvertently clicked on this newsgroup (I generally
don't), I may not have seen your reply for a long time. I'm glad I did,
must've been a psychic thing.
> Daniel <
[email protected]> wrote:
>>
>> I have yet to replace a chip on a board and so I ask this with respect to best
>> practices of the restoration community. Is socketing the chip a recommended
>> thing to do?
>
> The advantage is that if the chip fails it's easy to replace, the
> disadvantage is that if the chip seems to have failed, the first
> suspect is that it's just a poor contact in the socket. So easier
> to fix but _possibly_ less reliable. More of a problem if the board
> is likely to be bumped around a lot. You'll have to decide for
> yourself what you prefer.
I'll probably do a socket if it comes down to replacing the chip.
> You might also consider installing heatsinks on some of the chips
> seeing as you're doing everything else.
Funny you mention that. The thought never occured to me in doing this
until I saw this earlier. I just forgot to mention it on my to-do-list
https://www.thefuturewas8bit.com/64-repair
> In theory the originals had protection built into their design, it
> just tends to fail because they run too hot so the regulator chip
> dies an early death. Poor quality capacitors can also fail early
> and cause excessive supply ripple, more so if also overheated.
If I buy a c64 PSU, it'll come from sites specific to the C64 or
retroware. Something like this:
https://commodore4ever.net/collections/power-supplies/products/commodore-64-vic-20-power-supply-atom-retro
https://www.c64psu.com/c64psu/43-157-commodore-64-c64-psu-power-supply.html
> So if you're sure that the replacement power supply is well heat
> sinked and uses high quality genuine components, it might be
> over-kill to use a protection circuit. On the other hand if it's
> something that someone's cobbled together from cheap Chinese
> PSU modules bought off Ebay, then I'd suggest more caution.
>
> My design also indicates ripple and low 5VDC or 9VAC voltage:
>
http://computernerdkev.heliohost.org/comiemon/comiemon.htm
>
http://computernerdkev.heliohost.org/comiemon/relay.htm
Taking a look, thanks.
--
Daniel
Visit me at:
gopher://gcpp.world
--- SoupGate-Win32 v1.05
* Origin: Agency HUB, Dunedin - New Zealand | Fido<>Usenet Gateway (3:770/3)
