Elektor Fortissimo-100 amplifier...

What people are working on at the moment
Post Reply
User avatar
jack
Thermionic Monk Status
Posts: 5493
Joined: Wed Dec 29, 2010 8:58 pm
Location: ɐılɐɹʇsnɐ oʇ ƃuıʌoɯ ƃuıɹǝpısuoɔ
Contact:

#1 Elektor Fortissimo-100 amplifier...

Post by jack »

Elektor this month (November/December 2022) have an interesting amp with the following numbers: THD+N: 0.000.8 % at 50 W
into 8 Ω, maximum power 98 W into 8 Ω or 188 W into 4 Ω with THD ≤ 1 %. Uses a DC servo and is fully protected against DC on output and PSU faults... final drive is NJL3281D/NJL1302D, which are nice devices...

All PTH construction too... I've been tempted to build another "straight bit of wire with gain" amp for a while and with the PSU requirements this has, an "ideal rectifier" PSU based on the LT4320 (or similar) would be nice...

Really quite tempted...
2022-11-07 17_56_31-210364-01.pdf - Adobe Acrobat Pro (64-bit).png
2022-11-07 17_56_31-210364-01.pdf - Adobe Acrobat Pro (64-bit).png (145.77 KiB) Viewed 4929 times
Vivitur ingenio, caetera mortis erunt
User avatar
rowuk
Old Hand
Posts: 453
Joined: Sun Jun 01, 2014 2:50 pm
Location: Germany

#2 Re: Elektor Fortissimo-100 amplifier...

Post by rowuk »

Everything that I have ever built from Elektor has worked well for a short time, then failed. Amplifiers, preamplifiers, NiCad battery chargers and the like. Maybe it is me but I doubt it.
Whenever I feel blue, I start breathing again.
User avatar
jack
Thermionic Monk Status
Posts: 5493
Joined: Wed Dec 29, 2010 8:58 pm
Location: ɐılɐɹʇsnɐ oʇ ƃuıʌoɯ ƃuıɹǝpısuoɔ
Contact:

#3 Re: Elektor Fortissimo-100 amplifier...

Post by jack »

rowuk wrote: Mon Nov 07, 2022 7:08 pm Everything that I have ever built from Elektor has worked well for a short time, then failed. Amplifiers, preamplifiers, NiCad battery chargers and the like. Maybe it is me but I doubt it.
Nah. It's you!

Being fair, I've built a few things from elektor over the last 40 years or so and they've always been fine...
Vivitur ingenio, caetera mortis erunt
User avatar
Nick
Site Admin
Posts: 15707
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#4 Re: Elektor Fortissimo-100 amplifier...

Post by Nick »

which are nice devices
Though it looks a bit problematic to get hold of.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
jack
Thermionic Monk Status
Posts: 5493
Joined: Wed Dec 29, 2010 8:58 pm
Location: ɐılɐɹʇsnɐ oʇ ƃuıʌoɯ ƃuıɹǝpısuoɔ
Contact:

#5 Re: Elektor Fortissimo-100 amplifier...

Post by jack »

Nick wrote: Mon Nov 07, 2022 8:39 pm
which are nice devices
Though it looks a bit problematic to get hold of.
True. Mind you, 83 weeks factory lead time is interesting...
Vivitur ingenio, caetera mortis erunt
User avatar
Nick
Site Admin
Posts: 15707
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#6 Re: Elektor Fortissimo-100 amplifier...

Post by Nick »

jack wrote: Mon Nov 07, 2022 8:48 pm
Nick wrote: Mon Nov 07, 2022 8:39 pm
which are nice devices
Though it looks a bit problematic to get hold of.
True. Mind you, 83 weeks factory lead time is interesting...
There are lots of parts at the moment with that sort of lead time :-(
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
jack
Thermionic Monk Status
Posts: 5493
Joined: Wed Dec 29, 2010 8:58 pm
Location: ɐılɐɹʇsnɐ oʇ ƃuıʌoɯ ƃuıɹǝpısuoɔ
Contact:

#7 Re: Elektor Fortissimo-100 amplifier...

Post by jack »

Nick wrote: Mon Nov 07, 2022 8:39 pm
which are nice devices
Though it looks a bit problematic to get hold of.
In stock now!
Vivitur ingenio, caetera mortis erunt
Post Reply