http://www.ampslab.com/c300.htm
the transformer I have has both 240v, 120v primeries. whatis a tap ? should I hook it in series with the primary ?
the transformer I have has both 240v, 120v primeries. whatis a tap ? should I hook it in series with the primary ?
Stringing diodes is a bad idea as their junction drop varies with current and temperature (they will get very hot at high output), plus you need loads of them per rail.
if you use a regulator make sure it is a very beefy one that can handle all the current the amp needs driving 4 ohms at 300W you will need a considerable heatsink for this too!
Or you could see if it is possible to run the power transistors at 80V safely and then use a lower current regulator for the rest of the circuit to run off 70V?
Guytou: sounds like he cant do that because he only has taps for 115V and 230V and nothing in between.
Craig
if you use a regulator make sure it is a very beefy one that can handle all the current the amp needs driving 4 ohms at 300W you will need a considerable heatsink for this too!
Or you could see if it is possible to run the power transistors at 80V safely and then use a lower current regulator for the rest of the circuit to run off 70V?
Guytou: sounds like he cant do that because he only has taps for 115V and 230V and nothing in between.
Craig
This circuit should work fine on 80V rails but you will need to use different output transistors, such as the MJ15024/5 or the MJ21193/4. I'd also change Q15/Q16 to MJE15032/3 if you can as these are higher current driver transistors.
You may also want to replace the small signal devices with 2N5401/5551 or MPSA42/92. I would probably use the 2N devices for the LTP, and MPSA42/92 for everything else.
You may also want to replace the small signal devices with 2N5401/5551 or MPSA42/92. I would probably use the 2N devices for the LTP, and MPSA42/92 for everything else.
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