Is there a way to deepen the tremelo intensity on a Princeton amp?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Dr. Tweedbucket, Dec 21, 2009.

  1. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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    I imagine it would be just changing a resistor value or maybe the intensity pot range? Mine goes from full signal to maybe a half on wave with the dial at 10.

    Too, I noticed that there was a 12AX7 in place, maybe going to a 12AT or 12AU7 would be a fix? :confused:
     
  2. Roundtone

    Roundtone Member

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    You may want to check your power tube bias. The hotter the bias the weaker the trem. I prefer cooler bias on this circuit and would also recommend adding an adjustable bias pot.
     
  3. zombiwoof

    zombiwoof Supporting Member

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    I have a vintage PR, and the tremelo generally is not as deep as some other Fender tremelos, due to the design.

    Al
     
  4. Dr. Tweedbucket

    Dr. Tweedbucket Deluxe model available !!!11

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  5. Z-Rider

    Z-Rider Member

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    Last week I changed the 1M resistor (next to the 3 tremolo caps) tied to pin 1 of the tremolo tube to 470K on my '68 SFPR. After installing a biaspot it still wasn't very deep, but this worked like a charm! :)

    Z.
     

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