hello gentlemen
I have a question guys I'm trying to figure how much bias adjustment I need to have for 4 pairs using the AX-14 circuit IPS and I only adding 3 more pairs and I'm thinking that bias would be different, I place a volt meter reading on one of the emitter resistors to read mV there what would be the correct adjustment for 4 pairs output using 65V DC supply ? I mean close enough approximation 🙂
I have a question guys I'm trying to figure how much bias adjustment I need to have for 4 pairs using the AX-14 circuit IPS and I only adding 3 more pairs and I'm thinking that bias would be different, I place a volt meter reading on one of the emitter resistors to read mV there what would be the correct adjustment for 4 pairs output using 65V DC supply ? I mean close enough approximation 🙂
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You must use triple emiter folower to drive 4 pairs like in AX20 or BX20.
Regards
oh man 🙁 now I have to re-done some areas of the PCB is ok I can do that 🙂
thanks mister Mile
Best Regards
Juan
oh I see I think I can give the layout that option on the PCB I will figure that out later I have to " brainstorm " for a while 😛 but, the good think is that on simulation as it is I think it does responds really well 🙂 I'm not searching to get lot of power just a bit more
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That amp has 3 extra transistors so I'm not so sure how "cost effective" that is. It should probably be called an FX11.
Thanks for that. I moved the MJE50 at the last minute so it would align with the MJE40 just in case they needed a common heatsink. I re-connected the diodes to the collector instead of the base. I think I have it right now.
Thanks again, Terry
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Nice pcb, but you must replace resistors value (270R with 100R...) Use values from Dragans simulated schematic of FX11 for input stage, output stage with 2SJ/2SK is ok.
10pF misisng on your pcb...
Regards
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IRFP and 2SK/SJ have different pin outs. which one have you considered while making layout?
