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Chip Amps Amplifiers based on integrated circuits

Chip amp power supply- a beginners guide
Chip amp power supply- a beginners guide
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Old 21st September 2018, 10:01 AM   #801
jemraid is offline jemraid  United Kingdom
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Join Date: Aug 2004
Location: NE Derbyshire
Hello all,

I'm going to make MickF's minimalist LM3886 amp: Three-resistor LM3886 chipamp

And make a no capacitor power supply.
I have 4 bridge rectifiers and have found 10 MUR860 diodes.
I wondered if it would be worth buying 6 more diodes or just use the bridges?

Cheers
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Frugel Horn FH3 using very simple tools P2P Gain Clones, LM3876 & LM3886 https://frugelgain.blogspot.co.uk/
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Old 21st September 2018, 03:16 PM   #802
jemraid is offline jemraid  United Kingdom
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Join Date: Aug 2004
Location: NE Derbyshire
Hmmmm just looked closely at my MUR860's and am sure they are fakes.
Please ignore the question above I'll use my bridges.

Apologies - Jem
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Old 23rd September 2018, 08:33 AM   #803
Puffin is offline Puffin  United Kingdom
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Join Date: Feb 2006
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Hi Jem, I got an email that you had made post 801. I made many gainclones years ago, several LM3886 amps and some nice LM3875 monoblocks sit gathering dust! I wondered if you were aware of a site called Decibel Dungeon run by Nick Whetstone (TNT reviewer) There is a lot of good stuff on there. One thing I tried was the T-Network for the feedback. As he says it does sound more detailed, not necessarily better, Where did you get your MUR860's?

Link to DD site Building a Gainclone chip amp with T-network feedback network.
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Old 23rd September 2018, 11:48 AM   #804
jemraid is offline jemraid  United Kingdom
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Join Date: Aug 2004
Location: NE Derbyshire
Hello Puffin,

Many thanks for your message and for the links, I did know of Nick's site and have modified a Philips CD723 using his instructions.

I have also written to Mick_F asking about his two resistor amp: Mick Feuerbacher Audio Projects I prefer this and will build it.

The 'MUR860's' have U860 on them, but I will use a pair of bridge rectifiers, these plus two transformers are already in a box I'd made for an LM3875 GC which sounded rather weedy.

Cheers
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