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NX14
Suggestion from mr. Mile
Mosfet under heatsink, simple, & solid result
Thanx.
Regards
Suggestion from mr. Mile
Mosfet under heatsink, simple, & solid result
Thanx.
Regards
are the driver - transistors connected right, or they have reversed pin-out in this case? i don't have schematic or layout now,but i wonder...
R3 10K in schematic is labeled 22K on layout. Those who downloaded sprint layout file can edit it.
Corrected pdf files.
Could you post schematic for PROT clip signal power circuit?
Dear Mile sir,
what can be used an alternative to BDW83D and BDW84D in the kelvin amp? And also alternatives for Q1, Q4, Q6, Q8, Q9 and Q10?
regards
prasi
Schematic was posted by Miles some were in 100w-ultimate-fidelity-amplifier thread, I have forgot where protect schematic is on my PC. AX-20 schematic will help, Miles told this protect can be added to any amplifier.
Got your PM, I have not tested this amplifier myself, thole wanted to make this amp I send him sprint files. You can PM thole regarding NX-400. I'll probably test next month.
Sure you can use IRFP460, IRFP450 or any other mosfet.
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Hi Mr. Mile,
I was planning to build the Kelvin Amp. However I observed one ambiguity in schematic, PCB layout and actual photograph of the amp posted by you.
1. capacitor 104 (100nF) connecting signal ground and supply ground present on layout and not in schematic and unconnected in the amp photo. should use this capacitor or not?
what are the alternatives for MJE 340 and MJE 350?
appreciate your reply
reg
prasi
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Dear Mr. Mile,
I noted one more discrepancy in the schematic.
R15 is written twice in the schematic...pl see attached image.
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Hi Prasi, C6 polarity and D1 are reverse on schematic, place components as shown in layout. As you can see this IPS is used in other Apex amplifiers NX-14, AX-14, AX-20 etc.
MJE 340 and MJE 350 are common in India. Which city do you live?
2SC4793, 2SA1837 or other TO220 devices can be used with 180° orientation on pcb.
It's difficult to recommend alternatives because I don't know what's available locally to you. Look at first list and last list on posted transistors.pdf file then check at your local electronic component shop any of those available. Also Vceo must 100v or greater.
With TIP142 and TIP147 maximum voltage will be +/-45v for this amp and output will be around 140W-150W @4ohm.
Regards,
Sonal
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