Tube amplifiers i don't know anything

Frank840
Frank840 Posts: 262
in Electronics
my buddy gave these to me after finding them in his new house. I dont know anything about tube amps neither does he. I havent tryed plugging them in the wall yet.

7l3x64tpush0.jpg
i2lxfztbs332.jpg
267d6hd7pwpk.jpg
dacleqdxxxyh.jpg
xsk110qy28dz.jpg
w04v6ra7or94.jpg
- This your Bush?
Pioneer Elite Sc-25
Polk Lsic,15's,9's, PSW1000
· Share on FacebookShare on Twitter

Comments

  • pitdogg2
    pitdogg2 Posts: 25,447
    Strange I swear I see tube glow. Must have something on that is reflecting off the tubes. Can't tell what kind? Nice find
    · Share on FacebookShare on Twitter
  • mhardy6647
    mhardy6647 Posts: 33,804
    edited August 2015
    The DIY one looks to have some nice iron on it.
    If they haven't run for a long time, they should be brought back to life slowly to give the power supply filter capacitors time to reform. The DIY one looks quite modern under the hood and shouldn't be much trouble to get going again; the other one, if unrestored, would benefit greatly from (and may have an absolute need for) some restoration.

    The DIY amp is quite nice! The outputs are Tung-Sol (real Tung-Sol)... what? 5881s? I dunno :-P I see a 500 ohm secondary (output) tap on that nice Thordarson transformer; does it also have low-impedance (4, 8 and/or 16 ohm) output taps for normal loudspeakers? One hopes so.

    The "Universal" amp is an extremely simple single-ended 6V6 mono integrated. On the "plus" side, it has a built in (mono) MM phono preamp -- which probably uses the RIAA curve. Probably. On the "minus" side, it'll be very low power; coupla watts at best. Single fixed tap for speaker output, too... maybe 8 ohm; maybe 16. I wouldn't be surprised, though, if there were multiple taps on the output transformer itself.

    some basic info on tube amps and the care and feeding thereof from stickies at audiokarma:

    http://www.audiokarma.org/forums/showthread.php?t=778
    http://www.audiokarma.org/forums/showthread.php?t=71504
    http://www.audiokarma.org/forums/showthread.php?t=163570
    http://www.audiokarma.org/forums/showthread.php?t=443915
    · Share on FacebookShare on Twitter
  • Frank840
    Frank840 Posts: 262
    I'm not sure what to do with them I'm going to ticker with them once I get my hand on another set of speakers.

    Thanks for posting the info I will read that and then some as I literally have no clue about them and have never heard any tube amplifiers
    - This your Bush?
    Pioneer Elite Sc-25
    Polk Lsic,15's,9's, PSW1000
    · Share on FacebookShare on Twitter
  • heiney9
    heiney9 Posts: 25,165
    Tinker how? There is deadly voltage in those amps, so be very careful if you are tinkering and don't know what you are doing. You can die (seriously)

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
    · Share on FacebookShare on Twitter
  • afterburnt
    afterburnt Posts: 7,892
    I would be afraid of burning the house down.
    · Share on FacebookShare on Twitter
  • pitdogg2
    pitdogg2 Posts: 25,447
    DSkip wrote: »
    afterburnt wrote: »
    I would be afraid of burning the house down.

    From experience? Been wondering where you got your name.


    That or he's a serious Talking heads fan:)
    · Share on FacebookShare on Twitter
  • Frank840
    Frank840 Posts: 262
    heiney9 wrote: »
    Tinker how? There is deadly voltage in those amps, so be very careful if you are tinkering and don't know what you are doing. You can die (seriously)

    H9

    I just meant after reading about the amps I will then check them out before plugging them in. I don't play with electricity.

    - This your Bush?
    Pioneer Elite Sc-25
    Polk Lsic,15's,9's, PSW1000
    · Share on FacebookShare on Twitter
  • afterburnt
    afterburnt Posts: 7,892
    some things sure can sweep me off my feet
    · Share on FacebookShare on Twitter