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mods

  1. S

    Is this Dynaco ST 70 FUBAR?

    Found this guy on CL for a decent price compared to what people are asking for these Dynaco units around me lately. However is this unit FUBAR? A lost cause? I have worked on some tube equipment but I have never removed a mod and reverted a unit back to stock. It appears they have removed the...
  2. T

    Sears/Silvertone Amp Modification Questions

    I have a 1959/1960 Silvertone Model 2075 Console Stereo that has been working well aside from the turntable drive motor, scratchy volume pot, dial & indicator lights that are burned out, and poor bass response. I'm competent in electrical repair (following directions and the advice of others)...
    • tlowc34
    • Thread
    • mods silvertone tube amp upgrade
    • Replies: 7
    • Forum: Tube Audio
  3. M

    Hafler DH-220 Strange "External Capacitor Bank" Mod?

    Hello Everybody! Exxtreeemely long time lurker here Very quickly, let me introduce introduce myself. I've been lurking on here for years, and I've gleaned so much valuable information from you guys and gals! I just want to say thank you for the absolute treasure trove of valuable information...
    • MicahVW
    • Thread
    • dh-101 preamp dh-200 dh-220 filter capacitors hafler mods musical concepts power supply
    • Replies: 13
    • Forum: Solid State
  4. KinoRodori

    Need help on opamp replacement

    Hi guys! I'm still a novice to DIY maintenance, repair and mods on hifi equipment. I am confident with my soldering skills but I'm a little short on circuit wisdom. I have a TA-F222ESA (TA-F570ES in the west) that I recently repaired and it is working well. However its shortcoming is the...
    • KinoRodori
    • Thread
    • diy mods novice opa2134 opamp sony 570es sonyes
    • Replies: 22
    • Forum: DIY
  5. J

    4 Brand new Realistic Optimus 990

    Just left the local thrift with a conundrum. 4 Brand New Realistic Optimus 990 speakers minus the woofers. Thrift store removed and threw out the woofers due to rot, aargh. Anyway they came in original boxes, also thrown away, they were stored in high heat storage area. Hence the rot of the...
    • Jeff Radick
    • Thread
    • 15 inch 990 drivers mods new optimus realistic speakers woofers
    • Replies: 1
    • Forum: Speakers
  6. sgtpetter

    Audiolab 8000A - mods and schematics question

    Hi all, this is my first post. I have an Audiolab 8000A and want to install the "Preamp output muting" relay mod as described in a service manual that I found here: https://www.hifiengine.com/hfe_downloads/index.php?audiolab/audiolab_800... However, I've got a newer version than the manual...
    • sgtpetter
    • Thread
    • audiolab 8000a british hifi diy mods relay schematics needed
    • Replies: 1
    • Forum: DIY
  7. thr33p4c

    Harman Kardon Citation I - To Mod or Not To Mod?

    Fate has blessed me with two Harmon Kardon Citation I tube preamps. One was beautifully built but also "well loved." The other was drastically modified over the years and is missing a lot of original parts. The "well loved" unit had a pretty messed up face plate, broken balance pot...
    • thr33p4c
    • Thread
    • citation citation i harman kardon led modification mods tube tube preamp
    • Replies: 21
    • Forum: Tube Audio
  8. Mufflertape

    Wood added inside of headphone earcups?

    Just as the title states I'm curious about adding wood resonators inside some headphones, or all that have the space, to change FR and have possible favorable effects. I'm going to follow through with a mod to test but just curious if anyone else has attempted this or heard of this working in...
  9. ScooterMcTav

    Modifying/Improving Cerwin Vega HED U-123 Cabinets

    While I wait for my new woofer and surrounds to arrive for my CVs, I was wondering if anyone had any suggested cabinet mods for the pair. When I look in the boxes, I see a big empty rectangle with batting stapled to the sides. Any value in adding a brace to the inside, and making an enclosure...
  10. PCKIDZ

    Seeking suggestion for Chinese 6P3P kit mods

    I dusted off my soldering iron and put together a Chinese kit. The performance is quite satisfactory - high clarity and acceptable motor boat hum (when not playing) - it also looks pretty good! The quality is good overall though the connector sockets could have been better quality at that price...
    • PCKIDZ
    • Thread
    • 6p3p chinese kit mods tube amp
    • Replies: 1
    • Forum: Tube Audio
  11. wildchild

    Peavey sp1 mods, yea I know shoot me

    So I came across a pair of sp1 mkIIIs for dirt cheap. Plan to use for the garage or shop but still want some quality sound. Now before everyone gets huffy n saying they're junk,just remember the bass bins are better than my lascalas or any belle ,are lacking the 2 deadspots and resonace problems...
  12. vintagecrank

    Joseph Chow Mods on Components

    I got a quote for modifications on my Sony ES Power Amp, Pre-Amp and Tuner, I was hoping to get some thoughts from some Sony Vintage collectors thought on whether these mods are really worth the extra expense. http://www.positive-feedback.com/Issue50/audio_horizons.htm Thanks, Vintagecrank
    • vintagecrank
    • Thread
    • components mods sony
    • Replies: 2
    • Forum: DIY
  13. Gary Mattis

    Fisher bias vs. Mod pot bias ?

    I had a thought about tube matching and separate bias pots vs. Fishers factory all bias the same set up , which is better ? , Is the output power match more critical then trying to bias match the ma readings through negative bias methods with separate pots ?, sure separate pots cures one problem...
    • Gary Mattis
    • Thread
    • bias fisher mods tube amps
    • Replies: 23
    • Forum: Fisher
  14. wa2ise

    Improving audio from AM radio reception in tuners

    Getting better fidelity from AM radio stations. The AM NRSC-1 standard is: Contrary to popular belief, AM stations in the United States are not required to roll off audio above 5 kHz. For many years, no audio filtering was required, at all! In the early 1990s, however, a set of frequency...
    • wa2ise
    • Thread
    • am mods tuners
    • Replies: 5
    • Forum: Tuners
  15. p.robustini

    Thorens TD-16x: mod or keep it stock?

    I've been playing a while with my Thorens TD-165. I added damping material to the inside of the plinth walls, to the bottom of the faceplate, and lately even to the bottom of the sub-chassis (also around the bearing well) - using a combination of adhesive tar sheets and white tac. I have been...
    • p.robustini
    • Thread
    • cables dampening modifications mods td160 td165 thorens turntable
    • Replies: 7
    • Forum: Turntables
  16. TT-modified

    TT-modified

    This was taken november 2003 showing the moved motor. Otehr mods not visible include Arm mods and Shleter 901 cartridge
    • max-greece
    • Media item
    • 4 mods rpm with
    • Comments: 1
    • Category: Member's Component
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