Search found 2 matches
- Wed Dec 09, 2015 4:29 pm
- Forum: Hylight era Amps
- Topic: DR504 Noise Identification
- Replies: 1
- Views: 1485
DR504 Noise Identification
My DR504 has this intermittent popping noise that appears every minute or two. Louder/softer with master volume. Nothing plugged in to amp, happens with preamp volumes turned down or up. Cap job last year, they still look in good condition. I replaced power tubes last week, but the issue persists. O...
- Mon Dec 08, 2014 8:30 pm
- Forum: Hylight era Amps
- Topic: You might need a cap job if.......
- Replies: 23
- Views: 21377
Re: You might need a cap job if.......
Performed a cap job this weekend on my Biacrown DR504 OL. I have a feeling the old caps were original, as they had the blue solder that was used throughout the rest of the amp and apparently indicative of the guy who built the amp (Harry Joyce). They were all bulging or burst just as in the pics of ...