1962 Princeton

Discussion in 'Glowing Bottle Tube Amp Forum' started by Phrygian77, Jun 12, 2021.

  1. Phrygian77

    Phrygian77 Friend of Leo's Gold Supporter

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    This is the first 6G2 that I've had on my bench. Speaker is a Weber Sig10A-S.

    PXL_20210611_042752312.jpg


    Output tubes were biased really cold, less than 50%. The GEs that that were in there went into boxes, and I popped in a set of new Tung Sols, which also clocked in under 50%.

    I guess someone thought they needed exactly 25uF. Just one of these 100uF 50VDC caps would have been fine.

    PXL_20210605_194303811.jpg


    I clipped in a few different resistors in parallel, testing until I got the tubes biased up to 60%. Plate voltage was 385VDC by the way.

    PXL_20210606_193927337.jpg


    Someone had already replaced the cathode caps. These are older looking TE1207s.

    PXL_20210606_192350456.NIGHT.jpg


    13th week of '62.

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    The Astron can sections surprisingly tested good for ESR and capacitance (all were 22-28uF and < 1.18 ohm). I still went ahead and replaced it with a new CE can.

    PXL_20210611_033101371.NIGHT.jpg

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    New power cord and updated mains wiring.

    PXL_20210611_032802100.NIGHT.jpg


    This thing sounds phenomenal, especially with a Strat.
     
  2. Refugee

    Refugee Tele-Meister

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    Friggin' awesome! Never gotten to play a brown Fender. A buddy had a '67 Black Face Princeton Reverb, and it was a spectacular sounding little amp.
     
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  3. rjtwangs

    rjtwangs Tele-Afflicted Silver Supporter

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    Last edited: Jun 12, 2021
  4. theprofessor

    theprofessor Poster Extraordinaire

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    That electrolytic string on the bias board made me sad. Thank you for fixing that. And I agree that these things sound especially good with Strats.
     
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  5. archetype

    archetype Fiend of Leo's

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    A 6G2 has a fat, raging tone when cranked. That Sig 10A-S has its own fat, raging thing going on when driven hard. Does that amp play clean at all above 3 or 4?

    Cool amp, BTW. I'm glad you're excising its demons.
     
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  6. Phrygian77

    Phrygian77 Friend of Leo's Gold Supporter

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    No, I think by 4 it was starting to breakup. Didn't seem very loud either, which I attributed to the Signature 10, but I don't know since I've never had one to try.
     
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  7. Torren61

    Torren61 Poster Extraordinaire Gold Supporter

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  8. Dacious

    Dacious Poster Extraordinaire

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    Single best amp tone I ever heard - I walked into a guitar shop in Durham in 97, taking a break from touring while missus went shopping. Owner had just unboxed one. Plugged rosewood board 67 Tele in - oh my word. It just filled the whole store. Everyone stopped what they were doing to listen.

    That's my benchmark for a great clean, great breakup guitar-cable-amp setup.
     
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  9. Torren61

    Torren61 Poster Extraordinaire Gold Supporter

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    People that haven't tried these old Fenders don't know what they're missing. It's easy to say this amp or that amp sounds just like a Tweed, Brownface or Blackface Princeton or Princeton Reverb when you haven't heard one.
     
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  10. jimgchord

    jimgchord Tele-Afflicted

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    Sig 10s are pretty inefficient
     
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  11. SnidelyWhiplash

    SnidelyWhiplash Friend of Leo's

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    I'd replace the Weber with a better speaker. Make a great amp that much better.
     
  12. archetype

    archetype Fiend of Leo's

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    I've had a Sig 10A-S in an SCX2 for years. It's low efficiency, which I like, and gets fat and compressed when I push it.
     
  13. Intubator

    Intubator Tele-Holic

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    I'd be tempted to put in a pre broken in Weber 10A125 20W with no dope. But I'll bet that Sig 10 sounds just great as well. Nice amp! I hope to find one like it some day.
     
  14. Uncle Daddy

    Uncle Daddy Tele-Afflicted

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    I recently tried a NOS Fender Blue Frame alnico, one of the later 35w versions in a brownface voiced amp. Very impressed.
     
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