Calor amp 40 Watts Class A

All my knowledge and experience are futile value if they went with me one day under the ground, and I have not conveyed to others!
Well said ... :cool:
Would you mind if I derived from the calor to make a high power version
"slew" IPS ?

A question ... there seems to be 2 FB loops , one VFA/one CFA.
Does this split any voltage gain between the two stages ?

I was thinking of using a cheap standard dual op-amp , use one for servo ...
one for the main "deal" (amp). Also , standard hawksford as VAS.

OS
 
calor gold

small progress in calor gold.
 

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CALOR GOLD

First test successfully ended.
First time, amplifier tested at +/-24v from two regulated power supplies.
Second test with two transformers ,one +/-16v and other +/-8v in series.
All under control.
All small signal transistors BC550C,560C.
Out fets IRFP240,9240.
Sorry Dr.but i have these on hand now.
Tomorrow i will have a small listening test.
Some pictures from first test.
I guess it is not permissible to show the copper side.
 

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calor gold measurements.

Power suplly +/-30v
33.000uf/rail
R dummy=7R
Idle current =800mA./pair
1v RMS input give 20v RMS out./7R dummy=26db
20v RMS/7R=57W RMS just before clip.(1000Hz)
 

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