I have owned a Modulus 3A for many years. I breathed new life into my unit by replacing the 400V 100UF electrolytic capacitors with new ones; same brand and value.
One of the electrolytics is too difficult to replace, I left it in. I found room to replace one of them with a Jantzen cross cap metallized polypropelene 100UF 400V capacitor.
I believe this will solve your problem. As for the tubes, the 3A does not give any great response to expensive tubes.
One of the electrolytics is too difficult to replace, I left it in. I found room to replace one of them with a Jantzen cross cap metallized polypropelene 100UF 400V capacitor.
I believe this will solve your problem. As for the tubes, the 3A does not give any great response to expensive tubes.