TomHarrison1
Active Member
Hi everyone, just picked up a Cit 12 Deluxe this weekend and have a couple of observations/questions. First, I am seeing a surge on power up/down causing thump, woofer pulse that from what I've read online indicates the power supply capacitors are likely due for replacement. So I have ordered 4 new cans. The originals are Mallory Computer Grade, 6000 uF, 50V, but the closest ones I could fine are Mallory Computer Grade, 6800 uF, 50V. From what I have read, this should be ok. Thoughts?
Second observation, the externally mounted fuse breakers on my amp are not used. Looking closely, I see no evidence that solder was ever applied to the contacts. In their place, internal fuse breakers have been mounted on the underside as you can see in the attached photo. I can find no other images or write-up online regarding this mod. Can anyone shed more light on this?
Third observation, the original 6 pin differential amplifier trannies have been replaced with 2 separate trannies along with the 12K resistor swap out for the original 8.2K resistor.
Finally, this amp really sounds amazing. But I am still making plans to replace the cans, recap the amp board with Nichicon Gold Series caps, and replace the bias trimmer pots.
Thanks,
Tom
Second observation, the externally mounted fuse breakers on my amp are not used. Looking closely, I see no evidence that solder was ever applied to the contacts. In their place, internal fuse breakers have been mounted on the underside as you can see in the attached photo. I can find no other images or write-up online regarding this mod. Can anyone shed more light on this?
Third observation, the original 6 pin differential amplifier trannies have been replaced with 2 separate trannies along with the 12K resistor swap out for the original 8.2K resistor.
Finally, this amp really sounds amazing. But I am still making plans to replace the cans, recap the amp board with Nichicon Gold Series caps, and replace the bias trimmer pots.
Thanks,
Tom
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