Radio Road

RE: Make the storage inthe PSU about 3-4 times as big as original.

173.172.216.69

sherod

A

In Reply to: RE: Make the storage inthe PSU about 3-4 times as big as original. posted by Timbo in Oz on December 05, 2013 at 12:09:11

Timbo,
I agree that a beefy power supply is critical to achieving good sound with proper dynamic contrasts. I have bumped up the three main caps in the tuner from 2200uf to 3300uf. I had to drill new holes in the board trace to make these fit. Going any larger would take some serious shoe-horning. The sound is much better with the better caps with increased size.

Follow Ups:

3 x 2200 is more than I had expected 3 x 3300 will be plenty - Timbo in Oz 12:33:03 12/05/13 (4)
bypass at least the last one if there's room.

Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger
- RE: 3 x 2200 is more than I had expected 3 x 3300 will be plenty - sherod 12:46:54 12/05/13 (3)
  Thanks, Timbo. Here is a photo of a Citation 18 tuner from the FM Tuner site. The boards are all sideways plug in. The power supply board is on the left.
  - RE: 3 x 2200 is more than I had expected 3 x 3300 will be plenty - mcgjohn@yahoo.com 10:21:23 12/16/13 (2)
    If you unplug that board, looks like there is enough room to get a .1 or .22uf film cap on the trace side of the power supp PCB brd. That would be worth your effort if you can accomplish that.
    - I might try the bypass out... - sherod 20:47:24 12/17/13 (1)
      ...There is a 1" gap between the boards so plenty of room for small bypass caps. I'm wondering which cap would benefit the most from a bypass. Page 16: power supply pc board.
      http://fmtunerinfo.com/Citation18schalign.pdf (Open in New Window)
      - RE: I might try the bypass out... - mcgjohn@yahoo.com 09:43:54 12/19/13 (0)
        
        In Reply to: RE: I might try the bypass out... posted by sherod on December 17, 2013 at 20:47:24
        
        YOu could add a .1uf or a .22uf to each filter cap.

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