Hi to everyone!
One of my power amplifiers, a Harman Kardon HK 775 developed a problem. It starts making a cracking / poping noise and the DC offset goes crazy. It's an intermittent problem. I'm almost sure the problem is one (or more) of the input stage transistors so I need a suitable replacement. The adjustment pot a new mutiturn bourns.
I already tried the KSC1845 and the KSA992 but I noticed two new problems. First, the noise floor went up and second, these transistors got super hot. Any other alternatives? I don't mind making some modifications in order to fit a replacement with different pin order or using SMD adaptors.
Any suggestion please?
One of my power amplifiers, a Harman Kardon HK 775 developed a problem. It starts making a cracking / poping noise and the DC offset goes crazy. It's an intermittent problem. I'm almost sure the problem is one (or more) of the input stage transistors so I need a suitable replacement. The adjustment pot a new mutiturn bourns.
I already tried the KSC1845 and the KSA992 but I noticed two new problems. First, the noise floor went up and second, these transistors got super hot. Any other alternatives? I don't mind making some modifications in order to fit a replacement with different pin order or using SMD adaptors.
Any suggestion please?
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All Toshiba bjts are obsolete now. There are two sellers on ebay one from Germany, the other from Taiwan that they sell genuine Toshiba devices.
Avoid buying from sellers from China.
Good luck with your repair.
Art
Avoid buying from sellers from China.
Good luck with your repair.
Art
