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 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) .