the diodes bav21 I did not find them change them for diodos1n4148 and I want to ask a question
the diodes zf and z and all are zener of 15v or I am wrong
the diodes zf and z and all are zener of 15v or I am wrong
Greetings mr,apex sir
i try to make your hx 900 problem on step driver positive side +55vdc and negative side-65vdc increased on full volume. my rail 109-59-0-59-109vdc
i try to make your hx 900 problem on step driver positive side +55vdc and negative side-65vdc increased on full volume. my rail 109-59-0-59-109vdc
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friends good morning I want to thank God and all for their contributions in this post of the apex h900 because thanks to all the friends that shared it was possible to join me with great satisfaction this amplifier and I was not any mishap at the moment of putting it to work
Dear sir
Where is this step drive mirrored pdf .i want plz send me my email alvi.masood251@gmail.com
Thank you
I thinks Its posted.. just try to read back.
Otherwise let me know if you can't find it i will repost.
Regards,
hi sir please take note that when going to supply power on the amp see to it that all transistors output and driver are on heatsink...mje340(bias ) adjust according to drivers and outputs transistor temperature,,,dont forget to put series bulb in main input supply to minimize damage on parts when there still problem,,,Goodluck...🙂
Thank you very many sir Apex. H900 is no joke. I just woke up a Peavey PV1500 power amp that uses +-90Vdc from a 65-0-65Vac toroid and 8 pair C5200nA1943 trannies both channel so 4C and 4A per channel. Was burnt beyond repair but i have a working channel H900 n modified the toroid for H Class. I am impressed by performance. Thanks Apex. Here are some pictures.
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That was my very first H class. There has not been any IR2117 til' recently. H900 is indeed a performer. A million thanx to sir Apex. Long live sir Apex.
nice build sir kagz.....i enjoy making amp like this apex h900...
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An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Thanx moore4889. I see you use two irf540s for switches. I just used a single irfz48 without any problems. But my 16A MUR1620 diodes are usually hot at high volumes. Is this normal?
it is normal specially when driving low impedance speaker you better put some heatsink on those mur....
Regards.