Naim
- Thread starter Oldlady
- Start date
Send it in. That 60's tech stuff for board school girls . There are four elements to it. Maligned transformer 230V/30V , simple as fu..k rectifier bridge in full wave action , two bazuka capacitors (o.22 quid in wholesale to justify the cost of the whole affair) and three legged most primitive regulator originating in 50's concepts . Those blue beads are Nec tantals which likely are not the culprit but occasionally do short. They never need to be replaced but they are to justify the cost of "Naim recap"Go on, stick your tongue on one, I triple double dare ya!
Craig B
Re:trophile
I meant, stick your tongue across one of those reservoir capacitors and then tell us there is only 24V floating about within a HI-CAP. This is, assuming you can type, let alone talk, afterward.
This isn't the pfm DIY room, regardless, the OP has demonstrated some ignorance wrt working with electronics. As such, the correct advice is to recommend seeking professional assistance.
DiBosco
Active Member
If the unit has been switched off for a long time, even if there was rectified mains across the caps you'd be fine. It's staggeringly unlikely you'd die from a charged cap even if it was up to 340V and only just been switched off.
With all that said, always, always treat anything mains powered with the UTMOST respect and always power it down before opening it up. Mains is bastard dangerous.
In this case you have thirty something volts tops across the big caps, so as long as you don't lick 'em you'll be fine. The output tants have a tiny amount of charge in them.
I think they're 10u at 35V.
With all that said, always, always treat anything mains powered with the UTMOST respect and always power it down before opening it up. Mains is bastard dangerous.
In this case you have thirty something volts tops across the big caps, so as long as you don't lick 'em you'll be fine. The output tants have a tiny amount of charge in them.
I think they're 10u at 35V.
I had a 72 / 140 which I then added a hi-cap to. I am pretty sure that the 62 worked like the 72 - that changed when I went to 135s and you had to have a HiCap to power the 72. I seem to remember needing a black DIN plug to go into the 72 though when you worked without the HiCap. This takes me back ... I had 72 / HiCap / 135s / IBLs ... and a NAT01 ... selling the NAT01 was my biggest hi-fi "mistake".
Craig B
Re:trophile
15,000uF 63V
DiBosco
Active Member
15,000u tants? I think not!
Suffolk Tony
Aim low, achieve your goals, avoid disappointment.
As long as you're careful, there's no reason why you shouldn't do this yourself if you're proficient at soldering.
(Best to post such queries in the DIY section, then you'll avoid all the anti-Naim noise...)
Whats this noise your referring to ?
We are nearly two pages in and I haven't seen any noise yet ?
Maybe we see things different ?
(PS, I already happily own several Naim boxes including a Hicap - if that makes any difference to your comment ?)
Craig B
Re:trophile
Of course, I was referring to the reservoir capacitors. Must have had a wire crossed someplace.15,000u tants? I think not!
Hungry Halibut
pfm Member
Before soldering things, have you checked that the Snaic 5 lead is OK?
Craig B
Re:trophile
Claims to have done so, but no mention of having used a multimeter which would also allow one to test for the absence of 24V out on either rail of HI-CAP without so much as having to slide the sleeve off (i.e. set meter to VDC, remove SNAIC5, and test across HI-CAP socket 4, pins 1 and 3, as well as between pins 5 and 3).
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The tantalums are 10uF 35v and can be gotten from most suppliers, the large electrolitics are a little bit more difficult
Hi I would like to thank you very much for your help, I ordered the Tants and replaced them all, I also put the Hi cap on soak to boost the electrolytic capacitors, it cost me £4.50 to sort it out, luckily I have had 40+ years of soldering so that wasn’t a problem at all, I didn’t need to use the hob to do it like some of the sarcastic comments I got, I really appreciate your help thank you again
Well done! There are lot's of tw*ts on internet forums, but fortunately some good ones who actually want to help!Hi I would like to thank you very much for your help, I ordered the Tants and replaced them all, I also put the Hi cap on soak to boost the electrolytic capacitors, it cost me £4.50 to sort it out, luckily I have had 40+ years of soldering so that wasn’t a problem at all, I didn’t need to use the hob to do it like some of the sarcastic comments I got, I really appreciate your help thank you again