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Old 2nd July 2012, 02:47 PM   #2561
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My honey badger inspired amp with CFP outputs instead of EF.
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Old 2nd July 2012, 05:03 PM   #2562
osscar is offline osscar  Latvia
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amc184 : very good work done!

my latest phono is not as handsome as your:

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its based om TNT-indiscreet phono with some modifications. It sounds similar to Le Pacific / Salas Jfet Phono IMHO.
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Old 3rd July 2012, 12:58 AM   #2563
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ok, I finally decided to go with blue led's, Green are nice too, but I like blue better. and the bad thing when you got for a small chassis, you do not have enough room to proper locate boards, power supply, transformer etc. I was tired of big amps so I went for a small amp but with some juice too!

PS: it measure approximated W= 8 H= 2 1/2 D= 12
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Old 3rd July 2012, 04:47 PM   #2564
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Lanchile: Nice and tidy! ... +/- Rail voltage? Type of amp? (Power MOSFET?)
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Old 3rd July 2012, 09:31 PM   #2565
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May I present my newest amp: ZIRCLON140
This is a Circlotron amplifier and I have it documented on diyaudio.
On my homepage is these detailed description in German.
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Old 3rd July 2012, 11:51 PM   #2566
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Quote:
Originally Posted by FastEddy View Post
Lanchile: Nice and tidy! ... +/- Rail voltage? Type of amp? (Power MOSFET?)
45vdc per rail, but they can work from 30vdc to 60vdc, since I did not have more room for a bigger transformer I had to use this 300vac that I had around. These kits are the M400 from hdamp.com take a look http://www.hdamp.com/M400.html. This is so far the best amp I have ever had, and I had good ones like Bryston amp
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Old 4th July 2012, 01:38 AM   #2567
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If you mount the MOSFETs on their side to the heatsink, with wires connecting the leads to the pads, it's wiser to solder the gate stopper between the wire and the gate lead (+ wire link where the gate stopper resistor was)
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Old 4th July 2012, 01:47 AM   #2568
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Quote:
Originally Posted by jacco vermeulen View Post
If you mount the MOSFETs on their side to the heatsink, with wires connecting the leads to the pads, it's wiser to solder the gate stopper between the wire and the gate lead (+ wire link where the gate stopper resistor was)
Will that improve something?
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Old 4th July 2012, 09:12 AM   #2569
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Quote:
Originally Posted by lanchile View Post
Will that improve something?
To reduce the possibility of high frequency/parasitic oscillation. But of course, it seems that it will be just a waste to lift the 220R gate stoppers, knowing that the amp has more than enough compensation ("too" big input cap filter, caps across inverting and non-inverting input, RC filters next to gate stopper. Strangely, it doesn't have one across FB resistor).

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This is so far the best amp I have ever had, and I had good ones like Bryston amp
They (M400 and Bryston) are in a very different category. Bryston is pro-audio oriented. M400 is 3-stage amplifier with latfet output. The strength point of this topology is the monotonic THD spectrum, especially the non-symmetrical one. If you build the non-symmetrical one and replace one VAS transistor with a bootstrap, you will even hear sweeter vocal. This second harmonic things make comparison become subjective.

Well, the ESP P101 (the non-symmetrical version of the topology) is in the same category with M400. That's if you want a fair and less subjective comparison.
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Old 4th July 2012, 02:48 PM   #2570
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Quote:
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RC filters next to gate stopper
Any decent examples of RC snubbers from the Vas output to the rails ?
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