is this the same use in shredder machine and copiers. .one is led and the other one is phototransistor and it is activated by a lever between it which blocks the led light thus preventing the photo transistor from conducting.
No, it's not same optoresistor change resistance from 500000ohm to 50ohm, optotransistor just conducting.
sir is it possible for your dc protect to make it stereo and also your short circuit protect so that there will be not too much pcb.should i parallel resistor on 150k and how about the short circuit.what should i add to make it stereo.and should cut the line in middle between those pins of the relay to make it stereo is that possible?
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Hello sir. Thank you for sharing knowledge is very valuable. I would like to learn more about class H three steps. About VERTEX noticed a resistance value of R100 is different. I did not understand the "COUTI"nor the lm082. HER156 has similar?. I want to build the PCB of VERTEX. Will this work? Thanks!
thank you so much mr apex. coz i want to try your class h design right now me and my officemates are planning to build your amp.you have been very helpfull.
hi sir apex,
i have a trafo, that has a specs of 220v primary, 50v 0v 50v 2.5kw..
can i use it for your h900?
i have a trafo, that has a specs of 220v primary, 50v 0v 50v 2.5kw..
can i use it for your h900?
thanks sir,,
i have also a 2 trafo from my old amp 45v 0v 45v 1kw each,
can i use this for h900, pls advice,, i like to build your h900 sir im so interested with this class h amp.
regards,,
i have also a 2 trafo from my old amp 45v 0v 45v 1kw each,
can i use this for h900, pls advice,, i like to build your h900 sir im so interested with this class h amp.
regards,,
bias voltage
dear apexaudio
greetings can you please tell bias voltage across emitter resistances .33 in vertex driving stage supply voltage 70 0 70 dc
thanking you
andrew lebon
dear apexaudio
greetings can you please tell bias voltage across emitter resistances .33 in vertex driving stage supply voltage 70 0 70 dc
thanking you
andrew lebon
zener diode heating
hi apex audio
greetings yesterday i tested second channel of h900 sound is clear
no distortion but the 15 VOLT ZENER DIODE GOING TO NSL32 IS VERY HOT this problem i did not encounter in any of my h900 i have made before any reason
why this is happening base voltages supply voltages are correct load was 8 ohms output transistors are not very hot normal temprature
thanking you
andrew lebon
hi apex audio
greetings yesterday i tested second channel of h900 sound is clear
no distortion but the 15 VOLT ZENER DIODE GOING TO NSL32 IS VERY HOT this problem i did not encounter in any of my h900 i have made before any reason
why this is happening base voltages supply voltages are correct load was 8 ohms output transistors are not very hot normal temprature
thanking you
andrew lebon
h900 with speaker protector
already on trial, and the results are okay
already on trial, and the results are okay
An externally hosted image should be here but it was not working when we last tested it.
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