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Old 21st April 2013, 12:42 PM   #191
AndrewT is offline AndrewT  Scotland
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measure the voltage across it (Vds)
measure the current through it (Id).
multiply the results to get the power (Pq).
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Old 22nd April 2013, 04:59 PM   #192
george_ct is offline george_ct  Romania
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I plan to build it. I have not yet built it, so I don't have what to measure.

Last edited by george_ct; 22nd April 2013 at 05:03 PM.
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Old 22nd April 2013, 07:57 PM   #193
Loudthud is offline Loudthud  United States
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Quote:
Originally Posted by georgesco View Post
I plan to build it. I have not yet built it, so I don't have what to measure.
Judging from the voltages on the schematic the idle dissipation is under 250mW so a heat sink is not required.
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Old 21st July 2017, 11:05 AM   #194
jpdunord is offline jpdunord
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Default irf640

Hello all
I know that this thread is old but i want to know if we can use irf640 instead irf610?
I have some irfp240 or irf044n in stock and i want to use them.

Thanks a lot and sorry for my bad english

Jp
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Old 21st July 2017, 11:44 AM   #195
Zen Mod is online now Zen Mod  Serbia
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Plh
yes , you can
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Old 21st July 2017, 11:46 AM   #196
jpdunord is offline jpdunord
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thanks a lot zen i will try it and i will come back.

Thanks

Jp
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Old 3rd September 2017, 11:12 PM   #197
diegomj1973 is offline diegomj1973  Argentina
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An innovative way to implement something similar to PLH, maybe with some advantages .

DLH Amplifier: The trilogy with PLH and JLH amps

Regards
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Old 4th September 2017, 01:00 AM   #198
2 picoDumbs is offline 2 picoDumbs  Australia
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Very nice circuit.
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Old 4th September 2017, 01:06 AM   #199
2 picoDumbs is offline 2 picoDumbs  Australia
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If you can modify circuit to use 2sj74 at input, and get rid of input cap, while maintaining same basic operation I would give that circuit a try.
Hard to beat Aleph J/J2/F6 circuits but this is also very nice.
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Old 4th September 2017, 01:47 AM   #200
diegomj1973 is offline diegomj1973  Argentina
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Quote:
Originally Posted by 2 picoDumbs View Post
If you can modify circuit to use 2sj74 at input, and get rid of input cap, while maintaining same basic operation I would give that circuit a try.
Hard to beat Aleph J/J2/F6 circuits but this is also very nice.
Where I live, unfortunately I do not get a variety of elements to be able to fly in my designs. I must limit myself to using very limited elements. It's a shame.

Anyway, I have many tools to evaluate with enough precision circuits, without having to mount anything, and get the projection of how this circuit will work once it is assembled. With feedback circuits, I rarely had to deviate too far from the projections, making value adjustments.

For example, with LabView and Multisim 14, I could literally hear how the schematic of an amplifier would sound, by importing a real .wav sound file and injecting it into its input. In the output of the schematic, I export the .wav file of how it would listen.

Likewise, I can emulate ripple noises and see how they are reflected in the output. Or I can analyze the crosstalk, for example, by giving the parameters of the actual wiring layout of the power supply to the amplifier channels.

With these tools, everything is limited by our imagination.

My greatest regards
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