This amp had 2 shorted outputs and one blown power supply. The other power supply is still in tact. The power supply that was still in tact is being regulated and the one that I am using the 3205s in has a wider pulse width indicating to me that that power supply is working harder to maintain voltage.
When I power the amp on I get -46V on the secondary CT and on the RCA shields. I'm not sure what is causing it, any help would be appreciated.
When I power the amp on I get -46V on the secondary CT and on the RCA shields. I'm not sure what is causing it, any help would be appreciated.
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Just for your information this amp uses 2 494Cs, one for each power supply. Each power supply generates separate rail voltage for each channel. + rail on one channel is not directly connected to + rail on the other.
Each of the 494s has .25vdc on pin 4 yet each one is showing different dead times.
Each of the 494s has .25vdc on pin 4 yet each one is showing different dead times.
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Nevermind the different dead times, there's a pot for each 494 that feeds pin 1. Is there a certain pulse width I should set this to?
Other than setting the dead time, the only issue I have now is the -46v on the secondary CT. Referenced from secondary CT I have about +-48v. Both sets of rails are having the same symptoms, -46V at secondary ground.
Other than setting the dead time, the only issue I have now is the -46v on the secondary CT. Referenced from secondary CT I have about +-48v. Both sets of rails are having the same symptoms, -46V at secondary ground.
The rectifiers are in plastic cases and I don't get continuity between the center leg of any outputs and the metal plate.
Also, from a cold start the sec CT is at -18V, as soon as I turn off my power supply it jumps to the -40s and begins to discharge. Each time I start it after that without allowing it to fully discharge it goes directly to -46v.
Also, from a cold start the sec CT is at -18V, as soon as I turn off my power supply it jumps to the -40s and begins to discharge. Each time I start it after that without allowing it to fully discharge it goes directly to -46v.
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