Dehumming a '65 Princeton Reverb

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  • Опубліковано 23 гру 2024

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  • @mattonthewater
    @mattonthewater 4 дні тому +10

    Amazing as always Lyle. Great to hear my little 65 again, and on my 40th birthday!

  • @thatampguy
    @thatampguy 4 дні тому +6

    Merry Christmas! Always prudent to group the grounds as you did. Ground the filters with their respective stage’s cathode grounds. Killer job on sniffing out that reverb hum.

  • @mc4521
    @mc4521 2 дні тому

    And so you send another beautiful vintage BF Fender confidently into the future- I’d put money on it making to its 100th birthday in 2065 just fine..
    Really good recording of the amp, very open and full sounding, mic and its placement captured a good blend of the amp and the room..

  • @Acornhouseworkshop
    @Acornhouseworkshop 4 дні тому +3

    So nice to hear reverb at a reasonable level (as opposed to a certain West Coast retail establishment whose current demo guy cranks it.)
    Lovely!

  • @msi1985
    @msi1985 3 дні тому

    I always like to see these hum repair videos! I've had so many amplifiers with the same issue over the years or a similar type of issue... Watching a good Tech go over and fix these problems is very satisfying!

  • @joemcgraw5529
    @joemcgraw5529 4 дні тому +2

    amazing sounding Amp very clean and Beautiful ,Very nice restoration Lyle and this is why your in such demand

  • @douglasshaw1320
    @douglasshaw1320 4 дні тому +3

    Wow, killer sound!!

  • @michael_caz_nyc
    @michael_caz_nyc 4 дні тому +2

    You are so knowledgeable. I always enjoy your Informative videos. If ever I need work on my 65 Princeton (my baby) I will contact you to have it "Lyleized" & Upgraded. Happy Holidays from NYC

  • @martinreid1740
    @martinreid1740 4 дні тому +1

    Another great repair/restoration, Thanks for posting and best wishes for a happy and peaceful Christmas.

  • @npet6842
    @npet6842 4 дні тому

    Here in Oz , our wall voltage was 230 years ago , but nowadays in often high 240s . So for my Matchless collection I use a pair of 5V4 in the two socket EL84 stuff , and a 5U4 in the single socket EL34 amps . The BadCats are imported with 250V transformers , as the importer knows his product . Everything has been happy for the intervention . The Matchless are much cooler to touch .

  • @MikeM-Colorado
    @MikeM-Colorado 4 дні тому

    Nice mod to the reverb B+. That unused power supply node suddenly makes sense. In my own PR-type builds, I just use three 22uf filter caps, eliminating the unused node. Plenty quiet that way - no audible hum. Great video, thanks!

  • @donthompson2188
    @donthompson2188 4 дні тому +1

    Your amp repairs sound so good. I’m on a tone quest with my original Supros 6424. I recently restored them back to stock. I own 3, one has a tube rectifier the others have diodes. Hum has always been something I’d like to get rid of.

    • @PsionicAudio
      @PsionicAudio  4 дні тому +1

      Thanks. Supros have awful ground schemes - they always hummed.

    • @lordgraga
      @lordgraga 4 дні тому +1

      I can highly recommend watching Lyle's video on ground schemes. It's exemplified with various amps and then put into practice on a Marshall. It should be enough to get improvements.

  • @Strumbum01
    @Strumbum01 3 дні тому

    Beautiful sounding Princeton! Happy Holidays, folks!

  • @sgt.grinch3299
    @sgt.grinch3299 4 дні тому +1

    Merry Christmas to you and your family Sir.

  • @chokkan7
    @chokkan7 4 дні тому +1

    Happy holidays, Lyle.

  • @barry_hue1552
    @barry_hue1552 4 дні тому +1

    Merry Christmas and Happy New Year to you, yours, and everyone else

  • @lordgraga
    @lordgraga 4 дні тому

    I watched your Marshall ground scheme video carefully over the past days and it was nice to see that theory in action in another amp in a way that was easily understood after watching the video. Great stuff as always.

  • @johnburns5783
    @johnburns5783 4 дні тому +1

    Lovely sounding amp Lyle. Seasons greetings to you and your family. Have a great New Year too. 👍👍👍👍👍👍

  • @tangotommi
    @tangotommi 3 дні тому

    Nice work Lyle!! That’65 with the R-10 sounds absolutely beautiful!

  • @tomk1tl39
    @tomk1tl39 3 дні тому

    👍👍Merry Christmas Lyle, again, another great vid

  • @johnstitt2615
    @johnstitt2615 День тому

    Amp sounds sweet. 🎸✌️🎸

  • @rosslunato8111
    @rosslunato8111 4 дні тому

    Beautiful sounding amp Lyle! That’s the way it’s supposed to sound!!!!

  • @briancarl5566
    @briancarl5566 4 дні тому +1

    Sounds great! Thanks for your videos, I've learned a lot. Merry Christmas!

  • @goodyguitars4270
    @goodyguitars4270 4 дні тому +1

    Merry Christmas to you and yours Lyle!!!!!

  • @Joshua_Stephens
    @Joshua_Stephens 4 дні тому +1

    Sounds Amazing. Beautiful job...per usual. Nice House of The Rising Sun riff.

    • @PsionicAudio
      @PsionicAudio  4 дні тому +3

      I found myself playing it, which is odd as I never want to hear it again in my life.
      But it’s in my lizard brain…

    • @mikewithers299
      @mikewithers299 4 дні тому

      ​@@PsionicAudiothat was the first song I learned on guitar and sounded so sweet. I haven't played it in decades. Now I miss my BF Princeton. This sounds awesome Lyle!

    • @gregboboski9904
      @gregboboski9904 4 дні тому

      @@PsionicAudio Lets hear " don't let me down "

    • @PsionicAudio
      @PsionicAudio  4 дні тому +1

      I play that all the time.

  • @milanberic9212
    @milanberic9212 3 дні тому

    It sounds absolutely beautiful.

  • @danielmargolis3210
    @danielmargolis3210 3 дні тому

    My ‘65 PR is currently in the shop. I’m going to mention the 5u4 swap to my tech.

  • @Joe-mz6dc
    @Joe-mz6dc 3 дні тому

    Nice!

  • @larrychung3190
    @larrychung3190 4 дні тому

    Hi Lyle, would you consider using a 5V4 rectifier for a smaller amp like this as it has a lower voltage drop than the 5U4 and also draws only 2A of filament current (like the GZ34) and also is indirectly heated for a more gradual warmup? Just wondering. 🤓👍🏽 I'm a big fan of the 5V4 these days for smaller amps.

  • @howardskinner4916
    @howardskinner4916 3 дні тому

    The amp sounds great! Would a heavier gauge of speaker wire have made a difference in speaker output or tone?

    • @PsionicAudio
      @PsionicAudio  3 дні тому

      Thanks. It was a foot of 18AWG, so you wouldn’t hear any difference with 10AWG.
      Given the short distance and low wattage I could have used 22AWG with no sonic change. But the twisted 18AWG has better mechanical strength.

  • @jamesblack5370
    @jamesblack5370 4 дні тому

    I'm not a paying customer but I will ask you this anyway. I bought a new Jtm20h from ????? water. I love the amp. I patched the lower high channel or the lower channel 1 to the top 2 or normal channel I started getting somewhat noticeable noise like a bad ground. I will check another outlet I noticed the patch cable ( at least four feet long, had the words Marshall and pvc written on it. There might be other letters or words if I unfolded the cord. Dont' know. I never had an amplifier with a need to patch two channels before. I wondered if the materials made a difference . Ok having said that I did notice the hiss or noise wasn't as apparent when I was playing . Not maxed out on the pots. I was playing through a not well used 2x12 bass breaker cabinet (16 ohm) plugged into the 16 ohm jack on the back of the head using a speaker cable. Ok, I gave you what I had. I figure your busy but if you could, an idea or a few might be helpful. Thank you,

  • @bluesintheblood
    @bluesintheblood 10 годин тому

    How do you think a G10C would pair with a 15 watt 5F11 Tweed Vibrolux clone vs a Veteran 10"

  • @merrillaldridge2775
    @merrillaldridge2775 4 дні тому

    @psionicaudio. I need to drop by and see you sometime, but don't know your schedule.

  • @kmetal83
    @kmetal83 4 дні тому

    Champion

  • @hannowirth7245
    @hannowirth7245 4 дні тому

    The filament current of the 5U4GB is 3A, thats 1A more than the GZ34

    • @PsionicAudio
      @PsionicAudio  4 дні тому +3

      The amps sold with 5U4s had the same power transformer as the amps sold with 5AR4s. Not an issue.

    • @npet6842
      @npet6842 4 дні тому

      @@PsionicAudio A lot of people worry over rectifier heater current . There's lots of leeway , especially as the actual heater wattage is minimal anyway.

  • @greg3030
    @greg3030 3 дні тому

    But how’s the bathroom coming along?

    • @greg3030
      @greg3030 3 дні тому

      Also, Merry Christmas!

  • @guypoulin8454
    @guypoulin8454 4 дні тому +1

    Wow very quiet

  • @gregboboski9904
    @gregboboski9904 4 дні тому

    Go Lyle Go.....go

  • @chadvenable6782
    @chadvenable6782 3 дні тому

    Shoutout to the K-Line Springfield! Hopefully those nefarious purposes are you keeping it for a good long while. @k-liineguitars

  • @GratefulSam-et3ve
    @GratefulSam-et3ve 4 дні тому

    Happy holidays, Lyle.