Mosfet amp, 5 pairs IRFP240/9240

[Federmann]

I greet all fans of the extremely low distortion. Beautiful measurement Mosfet amp, 5 pairs IRFP240/9240

 

[Federmann]

Here is the measurement

Here is the measurement Mosfet amp, 5 pairs IRFP240/9240

 

[Federmann]

The price of two modules 340 €

 

[PMA]

Here is the measurement Mosfet amp, 5 pairs IRFP240/9240

You are showing measurements of the generator. All the measurements are here:

perys | perys - hqqf_spektra ? rajce.net

And these are amplifier measurements:

http://img7.rajce.idnes.cz/d0703/5/...qf-1to5_1.1W_1kHz-bench_Ynotone-Gtone-dif.jpg
http://img7.rajce.idnes.cz/d0703/5/...1to5_15W_13w14kHz-bench_Ynotone-Gtone-dif.jpg
http://img7.rajce.idnes.cz/d0703/5/...qqf-1to5_15W_1kHz-bench_Ynotone-Gtone-dif.jpg
http://img7.rajce.idnes.cz/d0703/5/...1to5_30W_13w14kHz-bench_Ynotone-Gtone-dif.jpg
http://img7.rajce.idnes.cz/d0703/5/...qqf-1to5_30W_1kHz-bench_Ynotone-Gtone-dif.jpg

 

[Sendy]

"Original HQQF" - not Perys modification :

10kHz, 8 ohm load, limitation.

http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/10kHz_limit.jpg
http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/10kHz_hard_limit.jpg

20kHz, 8 ohm load
http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/20kHz_under_limit_stor.jpg
and limitation
http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/20kHz_over_1dB.jpg
http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/20kHz_over_2dB.jpg
http://www.valachnet.cz/lvanek/hqqf_torture/sinus_left4/20kHz_over_3dB.jpg

So much joy and fun and only 340 € 😛

 

[Federmann]

Sendy:

You do silly measure, why? You must first set the operating point. I already wrote to you, you still do not understand? Measurements should look like this

They speak only empty words.

120Vpp/4Ω

Probe 1:1 Minimum sensitivity of the oscilloscope 5V/div

 

[Upupa Epops]

These measuring was made on unit, which was personally set up by Federmann and is funny, if he is talking here about correct set up procedure...😎

 

[Sendy]

Sorry, it is not funny... hubris 😡.

 

[Federmann]

Many of the measurements is:

Measuring amplifiers HQQF-55-506W-5-1, power and frequency ranges

 

[Federmann]

Other measurements:

Measuring amplifiers HQQF-55-506W-5-1, a small impedance

500mΩ

Measuring up to 200mΩ

 

[Sendy]

What about IMD and THD vs. frequency, THD vs. level ?

No answer, as usual?

 

[Federmann]

THD is very small, is immeasurable. Measurement error is much greater than the distortion.

 

[Upupa Epops]

Really, Federmann ? On which machines it was measured ? Or is it your holy fantasy ? 😀

 

[Federmann]

Before finishes.

 

[Federmann]

Measurements up to 500mΩ.

 

[Federmann]

Measurements up to 200mΩ.

 

[Federmann]

The final version will be soon

 

[Federmann]

 

[destroyer X]

These aluminium bars to lift pcboard from heatsink

Is a very good idea!

regards,

Carlos

 

[Federmann]

Soon will prisms copper