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9304-20

  1. D

    Magnavox 9304-10 volume control

    Hi all, I have read some of the many, many threads on the Magnavox 9300 series of amplifiers but have not seen a concise answer to a question I have: I would like to install a simple volume control on the amp so I can run it without a separate preamp; would like to run a source directly into the...
    • Diverted
    • Thread
    • 9300 9304-10 9304-20 magnavox volume control
    • Replies: 0
    • Forum: Tube Audio
  2. Harlon

    Decision Time: To Upgrade OPTs for Maggie 9304-20 or Not!?! Help

    For those who aren't following along, I'm amidst a console rebuild with a 9304-20 amp at its core. I'm working through a full console refurb, and it is time to either order upgraded output transformers or not. The idea from the beginning has been to go UL with the 9304-20 using new Dynaclones or...
    • Harlon
    • Thread
    • 9304-20 magnavox output transformers ultra linear upgrade
    • Replies: 42
    • Forum: Tube Audio
  3. Harlon

    Cathode Bypass Cap on AF Amplifier portion of Maggie 9304-20

    Here's what I did. After much reading I came across a thread about improving gain in a 9302 build by adding a 22uf cap across the cathode resistors to ground of the AF Amp section of the two 6EU7s. I had some 33uf electrolytic caps laying around so I jumpered them in place. I had read that 22uf...
    • Harlon
    • Thread
    • 9304-20 cathode resistor bypass cap improvong gain magnavox
    • Replies: 28
    • Forum: Tube Audio
  4. Harlon

    Conceptual Magnavox Console Preamp Control Question?

    For my Maggie Console Rebuild I'm refurbing a 9304-20 powered console with a twist. I just completed rebuilding the power supply. The next phase of the build is the Amp and Preamp. I'm considering moving the preamp 6EU7 to the Amp chassis. I'm wondering about this creating proximity issues for...
    • Harlon
    • Thread
    • 9304-20 controls magnavox preamp
    • Replies: 2
    • Forum: Tube Audio
  5. Harlon

    Doctor, Doctor, I need help. I've developed a nasty hum.

    Finished my power supply build. After running things for a few half hour listening sessions the amp has developed a pronounced hum. This is a Maggie console. I'm using the tape inputs in the tuner chassis to run music through an iPad. I've done a number of things to isolate the source. Here's...
  6. Harlon

    Maggie Console Rebuild: Chpt 4: 9304-20 Amp Refurb: Round One

    Why round one? At least for the original 9304-20 amp from my console, I am planning a three stage refurb/modification plan. The first round will be doing a frame off refurb of the amp with a few tweaks. The second round will include the replacement of the stock output transformers with a set of...
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