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Old 7th August 2005, 07:17 PM   #1
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Default transformer substitute question

i have a 150 watt rms sub plate amp and am trying to increase the reserve power to help reduce chances of amp clipping. i've replaced the two 6800 uf 63v. ps caps with 10,000 uf 80v. caps, replaced the 8 amp 400v. silicone bridge with 15 amp 600v. stealth diodes. these changes seem to be an improvement. the transformer secondary, the two blue leads put out 85v. and, it's center tapped. i have a blown 240 watt rms amp which, i took the 10,000 uf caps out of with same type transformer except larger and puts out 95v. between the two blue wires and is also center tapped. could the extra 10 volts maybe be too much for some of the circuitry thanks for any ideas crippledchicken
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Old 7th August 2005, 07:27 PM   #2
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It could make the rails higher than the max voltage of some components but I think it would be OK in that respect. The main problem would be that the output stage might destroy itself due to the possibility of increased power output and even running at the same power limit as before the risk is worse as there will be more stress on the output transistors due to the extra voltage they will have across them.

I wouldn't do it.
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Old 7th August 2005, 07:58 PM   #3
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Quote:
Originally posted by richie00boy
It could make the rails higher than the max voltage of some components but I think it would be OK in that respect. The main problem would be that the output stage might destroy itself due to the possibility of increased power output and even running at the same power limit as before the risk is worse as there will be more stress on the output transistors due to the extra voltage they will have across them.

I wouldn't do it.
hi richie00boy, i replaced the 2sc5200/2sa1943 with mjl4281/mjl4203 from on semi but, i'm not sure about the drivers and other circuitry so i think i'd better take your advice about the tranny. thanks alot, crippledchicken


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