Hello,
looks like I can't swing my boss to get a Radial J48 so I have to make do with my KT LB-100 DIs for a while longer. I've been trying to find an upgrade for them for a long time but I have had no luck finding schematics or mentions of any modifications. The problem is that the two LB-100s I have are quite noisy, mostly a high frequency hiss.
When it comes to possible upgrades I guess the transformer, the caps and the opamp would be the usual suspects? The transformer is a OEP J30A02/1 which I can't find any information on. The opamp is a Motorola mc33078p which to me look to perform quite well on paper... The electrolytic caps are EIC which is a make I haven't come across before but I'm quite the novice when it comers to electronics. If it would help I can post pictures at a later stage.
If anyone has any idea what would help to reduce the hiss I would be very grateful. Any suggestions are wellcome.
Cheers,
Andy
looks like I can't swing my boss to get a Radial J48 so I have to make do with my KT LB-100 DIs for a while longer. I've been trying to find an upgrade for them for a long time but I have had no luck finding schematics or mentions of any modifications. The problem is that the two LB-100s I have are quite noisy, mostly a high frequency hiss.
When it comes to possible upgrades I guess the transformer, the caps and the opamp would be the usual suspects? The transformer is a OEP J30A02/1 which I can't find any information on. The opamp is a Motorola mc33078p which to me look to perform quite well on paper... The electrolytic caps are EIC which is a make I haven't come across before but I'm quite the novice when it comers to electronics. If it would help I can post pictures at a later stage.
If anyone has any idea what would help to reduce the hiss I would be very grateful. Any suggestions are wellcome.
Cheers,
Andy