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Old 25th December 2007, 09:42 AM   #1
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Default naim gear recapped and bigger transfomer

i bet i can turn any old naim amp into a giant slayer
i have just modified a budget musical fidleity amp to kick a modern roksan into touch
naim charge a lot of money just for a re capp
i could save you megga bucks and tell you what parts to get
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Old 25th December 2007, 01:38 PM   #2
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Im all ears!
What Naim amp and parts do you suggest?
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Old 25th December 2007, 01:57 PM   #3
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hi any naim from nap 140 to 250 to naim nap 160 naim nait .and naim nait 2 & nait 3 to be honest any naim amp with bigger better spec replacement transformer, and bigger hi quality power supply caps
will sound miles better than standard maybe beating their newer more exspensive amps this musical fidelity amp has jumped from a pile of rubbish to a very end amp your amp if it is better than this will sound much much better


if you want to know what parts to use,i need to know what amp you have otherwise the transformer may not fit in the case and it would be handy to know what the ac voltage is from your current transformer easy to do if you have a muliti meter
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Old 25th December 2007, 08:44 PM   #4
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Hi, Ive got a chrome bumper nap 250, recapped with kendeil main smoothers, star earthed, feedback loop cap is now polyester, resistors in the signal path are vishay dale rn60, no coupling cap (got one on output of preamp) and an rc filter on the input of the regulator board.

What else do you suggest i do?
Cheers matt
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Old 25th December 2007, 08:50 PM   #5
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hi matt change the transformer for a very hi va at least 500 to over 800va i am not sure what your nap 250 naim transformer va is, but go much bigger and if your caps are the 10.000 make them 22.000 mf and make sure you choose one that is very low noise avondale sell them ,or you could find a good one at RS or farnel
also add inlet mains filter replace your iec soket in your amp
as this makes a big improvement if your mains is dirty which i am sure it will be
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Old 25th December 2007, 09:19 PM   #6
KLe is offline KLe  Australia
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Default SMPS

Why not simply try an SMPS ... like the ColdAmp SPS80 ...

http://www.coldamp.com/opencms/openc...S80/index.html

ciao
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Old 25th December 2007, 11:50 PM   #7
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Interesting stuff.
You should start a thread on www.pinkfishmedia.net . Loads of people modify Naim kit on that forum.
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Old 26th December 2007, 01:40 AM   #8
bob_v5 is offline bob_v5  England
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"hi matt change the transformer for a very hi va at least 500 to over 800va i am not sure what your nap 250 naim transformer va is, but go much bigger and if your caps are the 10.000 make them 22.000 mf and make sure you choose one that is very low noise avondale sell them ,or you could find a good one at RS or farnel
also add inlet mains filter replace your iec soket in your amp
as this makes a big improvement if your mains is dirty which i am sure it will be"

Sorry, dont know how to quote messages properly.

The bigger caps i understand, but then if they are of a suitable size to start with (which in most gear they probably are not) then this surely couldnt make any difference.

The transformer upgrade, is to charge the bigger caps more quickly? Again if it needs upgrading the original was too small, all for the sake of maybe 15% higher price....

What I'm trying to say is that I dont understand why people pay a lot of cash for equipment that isnt properly made! I learnt most of my electronics stuff from some old guy in my town, and some of the numbers he has shown me are shocking. I have never seen a power supply in comercial equipment that was of a suitable size.

Well, hope you had a good chrismas, sorry for the rant!
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Old 26th December 2007, 02:08 AM   #9
tyee is offline tyee  Canada
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Naim nait 2 here. What caps do I need?
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Old 26th December 2007, 06:23 AM   #10
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For a nait 2 you should look here www.acoustica.org.uk
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