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schematic

  1. FireGuruMN

    Klipsch Heresy I Restore, oh no not another one.

    I got a set of original Heresy's a couple of years ago. When I got them I hooked them up and they were unimpressive. I was hoping for 1980's boomy base to shake the room and that was not there. It never will be there until you buy Heresy IV's (or so I have heard). I Googled and Googled and...
    • FireGuruMN
    • Thread
    • capacitor crossover heresy inductor klipsch recap schematic
    • Replies: 9
    • Forum: Speakers
  2. FireGuruMN

    Sansui SM-80 Monster Amplifier from the 60's

    I'm going to be restoring a Sansui SM-80 that appears to be in all original condition and apparently was working when I bought it. I am just going through and lining up my first parts order but I was having trouble finding any schematics on the interweb. But low and behold Sansui included a...
  3. Alaskagram

    Luxman KM-Q7 power supply

    I am rebuilding a KM-Q7 and just realized that the first ,the big one, resistor may be burnt. The code reads tiel,brown,grey or blue,yellow. It measures 633 ohms which has nothing to do with the color code.It bridges a dual section 100mfd cap.,coupled to the second cap., which is a dual 50mfd...
    • Alaskagram
    • Thread
    • km-q7 luxman power supply schematic
    • Replies: 4
    • Forum: DIY
  4. Stuart Pedaso

    Boston Acoustics A70 elusive crossover schematic

    Pulled out my A70s to rotate into service for a bit and began mulling the technical aspects of these fine speakers. Not well versed in BA lore, I turned to the vast knowledge of the Web for enlightenment and am perplexed to discover no crossover schematic anywhere to be found. Seems odd for a...
  5. buck1108

    Acoustic Amplification AG60 Guitar Amp - Schematic Needed

    Hi, I'm troubleshooting my Acoustic AG60 guitar amp and am needing a schematic. Upon contacting the company, they said that they don't supply them, so I'm wonding if the schematic and/or service manual are on the net somewhere? After endless Googling, I came up with nothing. Thanks very much...
    • buck1108
    • Thread
    • acoustic amplification ag60 schematic
    • Replies: 3
    • Forum: Solid State
  6. B

    Schematic Help

    I'm pretty familiar with electronic schematics and recently bought a $10 practice amp to re cap and re transistor. Looking at the schematic I came across a transistor spec I'm not sure how to interpret. I'm attaching it as a pic but it reads with three different Transistors specified as part...
  7. Tubeglowpio

    Packard Bell DPA-150 Console amp schematic

    Hey guys, I'm wondering if anyone has the schematic for the DPA-150 Console amplifier, not sure which console it came out of for sure but it looks like it may be from a RPC-122 or similar. Thank you, hope to make this thing useful again.
  8. M

    Kenwood KA880D channel dropouts

    Hi everyone. I am trying to restore an old 80's Kenwood amp. Model KA880D. It has issues with random loss of signal from either the left or right channel, moments where the volume suddenly drops and goes distorted. I was able to fix lets's say 50% of the drop outs, by resoldering the volume...
  9. tom3

    Realistic cassette deck info needed

    Have a small Realistic auto reverse playback deck, SCP-5, model #14-169. Low output on line out jacks, lock in solenoid (magnet) is weak, end of tape reverse dead. Looks like low voltage? Looking for a schematic for this deck, searched around and didn't find anything. Anyone have a diagram...
    • tom3
    • Thread
    • cassette diy radio shack realistic schematic tape
    • Replies: 5
    • Forum: Tape
  10. H

    Restoring Fisher 800-B Need Schematic

    I did a web search for a schematic, I found a nice large easy to read schematic but its a different version than I have. In the schematic I found there is a quad 50uF cap that has 125 ohm resistors across it, in the one on my bench they are different. The serial number is: 23893D. This unit...
    • Hi-FiGuy
    • Thread
    • 800-b 800b fisher receiver schematic
    • Replies: 6
    • Forum: Fisher
  11. Rockyhill

    ADS L470/2

    I picked up a pair of these recently for $70. From what I have read these were made in ~1985 so I’m inclined to recap the xovers. Does anyone have a schematic for these? ADS is not listed in the AK database. I assume I’ll need to pull the woofers to access them. I found a hand drawn schematic...
    • Rockyhill
    • Thread
    • ads ads crossover schematic schematics needed
    • Replies: 3
    • Forum: Speakers
  12. M

    Adcom GFP345

    Hi everyone a friend of mine has a problem with his ADCOM GFP-345. He got those high pitched signal tone about 5700 hz from time to time from his GFP345 in both speakers. It disappears and come back again and again. When the music plays loud then he does not hear these signals but sometimes the...
    • Marantz22xx
    • Thread
    • capacitor high pitch noise preamp noise schematic service manual
    • Replies: 16
    • Forum: Solid State
  13. Squidward

    Kegger Schematics Mega Thread

    I'm going to start this thread with a specific aim: To preserve the knowledge that Kegger freely gave our community. This thread is for posting schematics that Kegger created. He designed some very popular amps (KT-88 SEUL, for one), but he also has some lesser known designs that shouldn't...
    • Squidward
    • Thread
    • amplifier diy el-84 kegger kt-88 push pull schematic seul single ended tube amp tubes
    • Replies: 51
    • Forum: Tube Audio
  14. D

    2285BD,,,,,, again .

    Hello , all . I am new to this forum ,site , and Vintage AUDIO. I bought a new 2285B receiver ect not long after I graduated High School in 1976. I got one of the first production units as I had it before the end of the first semester , of Jr College. But back in now a d my son bought me a...
  15. scootsity5

    Yamaha R-500 Power Supply Schematic

    Hello all I'm having a hard time tracking down a high enough resolution picture of the power supply section of the schematic for an R-500. I switched it on a few weeks ago, smelled some magic smoke and the system stopped working. I noticed that it powers on, all lights come on, but it never...
  16. Tubeglowpio

    Voice of music 1448

    Just bought one of these online after reading a few good reviews, I'll post some pics when I restore it. I really need to locate a schematic so if anyone has one please link or pm me. If anyone has any info or insight on this amp let me know, they seem kind of rare.
    • Tubeglowpio
    • Thread
    • 1448 help schematic stereo tube amp voice of music
    • Replies: 20
    • Forum: Tube Audio
  17. skynetyt

    Mcintosh schematics asterisk (*) mark question?

    Hello! On Mcintosh Service manual (for example for mc-2155 unit) there are pieces in parts list markers with asterisk mark (*) and also there is a mark: *Parts marked with an asterisk (*) are replacement parts stocked our Service Department and must be ordered from Mcintosh. These parts must...
  18. Ryan Scruggs

    PROBLEM with Marantz SD 9000 Compudeck PK21 Board

    Hi, all! I have previously posted about some issues I have been having with my Marantz SD 9000. I have replaced the notoriously bad optocouplers, and all belts and idler tires. What I neglected to notice were the burnt out resistors on the PK21 board of the machine. I purchased and replaced...
    • Ryan Scruggs
    • Thread
    • help issue marants problem resistor schematic sd 9000 tape tape deck tape player
    • Replies: 0
    • Forum: Tape
  19. Ryan Scruggs

    Marantz SD 9000 Compudeck PK21 Board Question

    Hi, all! I have previously posted about some issues I have been having with my Marantz SD 9000. I have replaced the notoriously bad optocouplers, and all belts and idler tires. What I neglected to notice were the burnt out resistors on the PK21 board of the machine. I purchased and replaced...
    • Ryan Scruggs
    • Thread
    • compudeck help marantz pk21 problem question resistor resistors schematic sd 9000
    • Replies: 8
    • Forum: Marantz Audio
  20. hrnoevil

    Heathkit AM/FM tuner AJ32 manual/schematic WANTED

    I m trying to restore a Heathkit AM/FM tube tuner model AJ-32 and looking for a manual or schematic. If you have one and willing to share please contact me. I am more than happy to pay you or make a donation to Audio Karma on your behalf. ***Thank you everyone, I have already purchased a copy*******
    • hrnoevil
    • Thread
    • aj-32 tube tuner heathkit manual schematic
    • Replies: 1
    • Forum: Tuners
  21. milosz

    Help! Need help with this crossover schematic

    HELP!! I have a Boston Acoustics T1000 crossover but I do not know how to wire it to the drivers or to the input from the driving amplifier. (I also have all the drivers) This late 1980's 3-way speaker system has two 8 inch woofers, a 6.5 inch mid and 1 inch dome tweeter. Obviously they all...
    • milosz
    • Thread
    • boston acoustics crossover schematic
    • Replies: 17
    • Forum: Speakers
  22. Michel1977

    Tsakiridis Achilles 2A3 Schematic wanted.

    I'm looking for a schematic for a Tsakiridis Achilles 2A3, I received this pair of amps for repair but nothing is original anymore. Original it has: 2A3, 6SL7, 6L6, but is now equipped with 2A3 and 2 6SL7's in parallel (????). 6L6 is gone but I suspect it was used for B+ stabilization. Some...
  23. P

    SAE A202 schematic

    Still new here, so I'm sorry if this is in the wrong forum, or anything like that. I'm looking for a proper schematic for a SAE A202. I did google, but didn't find anything I would consider legit. Any help would be appreciated. Thanks psc
    • psc
    • Thread
    • a202 sae schematic
    • Replies: 4
    • Forum: Solid State
  24. W

    AU777A Died

    I am looking for a detailed schematic for the AU777A Sansui Amplifier. This unit has served me since new in 1970 with fantastic audio. I use a pair of Speakerlab K homemade corner horns. I plan to replace all caps and transistors as needed. Thanks Woody MacKay woody.mackay@gmail.com
  25. H

    Sherwood S-5500 Schematic

    I am looking for a schematic for a Sherwood S-5500 amplifier. This amp has the 7591 output tubes that are horizontally mounted and 5 12AX7 tubes. The rectifier is a voltage doubler. I have looked on google and I can only find the S-5000 schematic and it looks close to this amplifier. Does...
    • Hi-FiGuy
    • Thread
    • 7591 amplifier integrated s-5500 schematic sherwood
    • Replies: 22
    • Forum: Tube Audio
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