Thank you czarivey. I checked the bias voltage last night, all the plate voltages are very low <20V. I looked into the power supply and found a intermittent connection on high voltage regulator transistor TIP50. I solder it. Now the CAT is alive! But one thing i notice that V1 / V2 (6DJ8) plate voltage is about 90V instead of 180V that someone suggested. Is this normal?
CAT SL-1 Reference repair
I recently bought a CAT SL-1 Reference preamp. The line stage is great. But the phono stage doesn't work properly. I crank up the max volume but it doesn't give reasonable listening level and it became too noisy. The sound is dry and week. It doesn't balance well either. I replace all the tubes in phono stage but without luck. Anybody has a schematic of this preamp? I didn't find anything on internet. Any suggestion is appreciated. Thank you.
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- 13 posts total
- 13 posts total