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power

  1. davstev

    When you can't power up a Sansui 210

    Hi All, I have inherited a 10 WPC Sansui 210. Cute little thing, seems to get pretty good reviews. It won't power on. I tested all the fuses inside the unit with my DMM, and they test fine. No fuses on the back. The former owner said that he heard a pop or something like that, and after, the...
    • davstev
    • Thread
    • power recevier sansui sansui 210
    • Replies: 6
    • Forum: Solid State
  2. Theartemis

    Grundig Majestic SO190Ua1

    Hello, I hope I’m in the right place. I have been on the search for a few years for a Grundig Majestic (SO190Ua1) and finally found one at a decent price. I love her! However, she doesn’t seem to be getting power. I’ve tested the power in and power out and both have power, I don’t really know...
    • Theartemis
    • Thread
    • grundig power
    • Replies: 12
    • Forum: DIY
  3. Racingh11

    How to increase power (MCS 3235 to 3245)

    I recently modified an MCS 3245 receiver to greater power output using a 3275 transformer and other modifications. It can be read in this thread: https://audiokarma.org/forums/index.php?threads/how-to-increase-power-mcs-3245-to-3275.968122/ The second conversion I did in that thread left me...
    • Racingh11
    • Thread
    • 3235 3245 mcs modular component systems power receiver transformer upgrade
    • Replies: 34
    • Forum: Solid State
  4. vheintz

    Just getting started. speaker size, wattage, room size

    I'm curious to know if there is a formula to determine speaker size and power in relation to the listening room. My listening room is 14' wide (speaker wall) x 12' long x 9' high. modern construction (dry wall), concrete floor under glued hardwood floor. one window with heavy curtains to the...
    • vheintz
    • Thread
    • acoustics formula listening room power speaker size
    • Replies: 83
    • Forum: Listening Spaces
  5. U

    HK 430 no power

    Hi all- I'm a newbie here, just started collecting vintage gear. Picked up an HK 430 yesterday, and ran into a not small problem that it will not power up at all. No lights, nothing. I opened it up and didn't see any blown fuses or other obvious signs of failure. Anyone have any ideas about...
  6. tlite

    How to Measure Power of Amp's Headphone Jack

    Specifically trying to figure out what the power output is of my Marantz 2235's headphone out, and what headphones is can reasonably drive without additional amplification. I understand I can just buy headphones plug them in and if they sound good, then it is good, but I'm curious as to how to...
    • tlite
    • Thread
    • headphone jack headphone power how to measure output multimeter output jack power
    • Replies: 12
    • Forum: Headphones
  7. AdventDude

    Hafler XL-280 power problem (hoping for guidance)

    Greetings, A very close friend from high school convinced me to go the Hafler route many years back and I purchased both a DH-110 preamps and XL-280 (both in kit form) just about 35 years back. Though I've had a few minor connectivity issues arise over the past few years with the DH-110, the...
    • AdventDude
    • Thread
    • fuse hafler power repair switch
    • Replies: 10
    • Forum: DIY
  8. S

    Pioneer sx 450 won't power on

    I'm having a problem with my pioneer sx450. It's flickering and won't power on. At first everyone said it was the power switch so I tried to clean it but then when I disconnected my speakers I could hear this crackling from the transmitter. I didn't think this was Normal but I wanted to confirm...
  9. david winter

    Luxman L-31 power switch replacement model

    Hi, Is there a model of power switch which fits the Luxman L-31 ? As I don't have the amp with me right now, I can't even try to see what can directly replace it. Thanks !
  10. Racingh11

    How to increase power (MCS 3245 to 3275)

    I recently went to service an MCS 3245-10 I bought. (45 watt per channel) Upon initial dim-bulb turn on, it was idling fully lit. After disconnecting things, I found that the power transformer was shorted and pulling 110W by itself. None were available, so I bought a transformer for a 3275 (75...
    • Racingh11
    • Thread
    • 3245 3275 mcs modular component systems power upgrade
    • Replies: 68
    • Forum: Solid State
  11. K

    Need help identifying missing tubes for mystery amp

    Hello, I'm working on restoring this small power amp. It looks like it came form some sort of turntable console or something since it has plugs to switch the power, an extra a/c plug, and maybe power delivery for an a/c motor. It appears to be stereo and single ended for each side. The power...
    • kanurys
    • Thread
    • amp power poweramp stereo tube
    • Replies: 21
    • Forum: Tube Audio
  12. xray543

    Switched outlets on Marantz Model 33

    I have a question for the group. I have a Marantz Model 33 that I just acquired and would like to use the rear Switched AC outlets ( there are five of them) to power the Marantz Model 32 Power Amp and two multidisc CD players. I would ideally like to have them all come on at the same time. The...
  13. R

    Sansui 771 restoration gone wrong, help please

    Hello dear members, my name is Romulus and I am new to this forum... at least i've been reading a lot from the Sansui section and this is my first post. Recently got a Sansui 771 in very poor shape but it was working. I've done some major restoration to cosmetics and repaired a couple of lights...
    • Romique
    • Thread
    • 771 fail mistake power receiver restoration sansui stereo transistor
    • Replies: 17
    • Forum: Exclusively Sansui
  14. A

    Thorens TD-165 RCA Terminals, Static Electricity, Stylus Quivers

    Hi all, Continuing to troubleshoot an issue I have on my TT, and I've noticed something odd (to me). Hoping others can shed light on this. I provide a narrative of my troubleshooting journey, but if you want to jump down to get to the meat of the question, it is #4 in this post. Stereo...
  15. Zach Nelson

    Using variac always with Scott 222c

    I heard a guy say that he always runs hit Scott through a variac to keep it at 117v. Is there any real reason for this? I understand wall sockets can be 120-125v, just curious if that was enough to damage a amp that has be restored.
  16. jimtulsa

    ? no sound

    Hi Looking for some help: 1) Tips to hooking untested receivers and speakers. 2) Simple trouble shooting on receivers with light, signal, and no sound. 3) Simple trouble shooting on receiver with lights, no signal, and no sound. 4) Simple trouble shooting, no lights, no signal, and no sound. I...
  17. G

    Power plug and grounding

    Good day! I was wondering about one thing for a few weeks now, and I can't seem to get the "straight forward answer" anywhere. I was a bit annoyed with those old plugs on the vintage amps that don't fit into the new european 220v power outlets, because of the lacking ground pin cutouts. So on...
    • GytisB
    • Thread
    • chord european 220 volt plug power power plug
    • Replies: 20
    • Forum: DIY
  18. M

    Marantz PM7200 lack of power?

    Allô everyone, thanks for this forum and your attention. This Marantz PM7200 cuts out the sound on both channels for a half a second on transients, and recovers. Until the next transient. It will do it as well on not very dynamic music with volume pushed, at the slightest peak. It does that on...
    • mossieurclo
    • Thread
    • capacitors marantz pm7200 power sound cuts out
    • Replies: 11
    • Forum: Solid State
  19. turnitup

    LED Polarity

    Hi all, Hope that this an easy one. I bought a LED light panel that requires a 120 AC to 12V DC converter...no big deal, got one. The correct polarity is critical for LEDs, how do I determine which lead is the positive? I’ve got a meter, just don’t know what to test for. Stupid question, I...
    • turnitup
    • Thread
    • led polarity power
    • Replies: 7
    • Forum: DIY
  20. D

    Marantz 2240 Blowing Fuses on Power On

    Hey friends, it's been a long time, but I'm finally back to servicing and maintaining my gear. My Marantz 2240 blows a fuse every time I power it on. Can you give me some advice on where to start looking for issues? I'm attaching a few pics and the schematics. This sucker is very clean with no...
  21. HendeoNZ

    Strange effect - Amplifier power on/off

    Hi all, I've noticed a strange effect when I turn on/off my amplifier. Recently I've had my computer monitor (sitting next to the amp) connected to the same power board as my amp, and when I turn on or off monitor will go black for a few seconds - like it's lost single or power. Anyone know...
  22. PDXVANDAL

    Dual 510 -- power loss?

    Hi folks. This is my first post, so hope it's in the right place. I have a Dual 510 turntable that all of a sudden won't turn on/spin when lifting the control arm. (Full disclaimer: I know basically zero about turntable repair.) Anyway, I popped the plate and cover off to investigate. I used...
  23. oftheclod

    Lights stay on! Yamaha ca-2010

    Hi all, Got a Yamaha ca-2010 old girl up and running from the curb yesterday! Had to replace a power cord and a fuse and it sounds terrific hit it with deoxit and all the switches are working and quiet - only problem is all the lights stay on even when switched off! what might this mean?
    • oftheclod
    • Thread
    • ca-2010 led lights power yamaha
    • Replies: 33
    • Forum: Yamaha
  24. S

    Bose 1800 with Alons IV

    hi Guys, I want your thoughts on whether pairing the bose 1800 amplifier and Alon IV would be a wise idea or its a recipe for disaster. I have an Alon IV and i am being offered a bose 1800 for virtually nothing and looking at the specs of the Amp , i am wondering if its safe for the...
  25. D

    My Kenwood KA-801 stopped working. Need Help.

    I have a Kenwood KA-801 integrated amplifier. Recently I decided to clean up volume potentiometer (with deoxit), because it was producing static noise while turning. Accidentally i broke one of the wires that was connected (with screw) to the chassis, but soldered it back. Now when I try to...
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