amplifier

  1. sean sweeney

    Question on 1959 Crown SXA tube amp power supply, switching noise from half wave rectifiers?? 120hz hum.

    So I got this amp in a trade deal a few weeks ago, and after one issue of basically building it back from scratch, from a blurry schematic from 1960, I still am getting some 120hz hum when the unit is idling, with the inputs shorted. I just replaced the selenium rectifier, and that seemed to...
  2. M

    Sansui A40 bulb busted; weird power reading from PSU?

    Ls, Not long ago I replaced the 8v bulb that sits behind the meters in this Amplifier. It started failing, but would relight on light tapping. Changing a bulb is about as good as I get with electronics, but I thought I'd try some quick metering before I turned to the AudioKarma Oracle. So the...
  3. K

    JVC AX-435 vs Yamaha AX-470

    I'm trying to decide which among these two amps is better. The JVC is part of the Super-A series, so I know that it's a Class-A amplifier. On the other hand, I cannot find much info regarding the Yamaha. In your opinion which is the better amp?
  4. V

    Recapping and FM tuner station issue on Technics SA-5360

    Hello everyone, I had recently purchased a Technics SA-5360 Stereo amp tuner from eBay. This was after a long break since 2019 I took from my vintage electronics hobby. I used to mainly collect and restore tube based tuners and amps, but recently it has become quite expensive I noticed...
  5. Jeezlouise

    SHARP SM-511H connection type

    Hi, I have a bit of a stupid question: I found a sharp sm-511h amp and i don’t know what kind of cables I need for the connection Please help :)?!
  6. david winter

    Blue "ladder" slide for input selector (PM-65AV, PM-80 etc)

    Hello, I need to replace the blue "ladder" slide which links the front panel rotary input switch to the linear input switch on the input board. The thin flat metal strip has broken and I can't manage to solder something on it. I don't know the right term for this part, and can't find a...
  7. analogwisdom

    A comprehensive list of 100WPC+ @ 8Ω Integrated Amplifiers, 1970-1980

    Hey y'all. I was searching the forums for a list of Integrateds from this era (my favorite) that are 100WPC @ 8ohm or more and noticed the lists I found weren't maintained by the OP so I wanted to make this thread with a more comprehensive list that I will do my best to keep updated. We can't...
  8. kevka

    JVC JR-S400 with a noise problem, any ideas?

    Hello and best regards! I have a JVC JR-S400 “Mark I” that is looking for some use. However, it doesn’t quite work as I had imagined. In and of itself, everything is almost fine, but there is always some sort of noise in the background that can also be influenced by changing the volume control...
  9. L

    Repair help: Yamaha AX-540 amp

    Love my old AX but the left channel sounds slightly "dull" compared to right channel. At first I thought it was just a volume difference, but it also lacks some brilliance compared to the other channel. Sitting at ideal listening position, the right channel sounds brighter and louder. I have...
  10. Freestone

    Pioneer SA-6700 Power on, No Sound

    Hi all, I am new to audio equipment, audio karma, and vintage electronics. I purchased my late model SA-6700 in its current condition for $90 because I love the look of it and have experienced the high quality sound from a similar Amp in the past. I have been wanting to get a nice setup for a...
  11. B

    AU-555A adjustment

    Hello, In 2013 I bought a Sansui AU-555A. Since then it had been working fine, at least for my expectations, except for the phono but I did not use it. A few months ago, after reading, I don't remember where, that after 50 years an amplifier with original electrolytic capacitors (EC) should be...
  12. Q

    Intermittent Noise Coming from Left Channel

    Hello! I'm not well-versed in audio matters regarding equipment, hence why I'm here. So heres the issue I've been having for months now: my left channel is making a weird noise, even if no audio is being played or if I set my volume to 0. Whether its my speaker or my open-back headphones, the...
  13. Synergy

    EL34/6CA7s + 6GH8A + ECC83/12AX7s ... Superb !

    Sweetest sounding amp with EL34 / 6CA7s + 6GH8A + ECC83 / 12AX7s and all selfmade transformers. Added a stereo bluetooth though, but its switchable. Demo video
  14. Econolett55

    BGW 500D HELP

    I need help identifying the transistors for this power amp. I'm experiencing issues with the left channel in which the volume is either near quiet or fluctuates up and down or pops then goes back quiet. I Isolated the issue to the amp and not the pre-amp. I deoxit the gains but still did...
  15. M

    Cartridge Upgrade - Noob looking for advice

    Hello all! I'm new to this community but by the looks of it you all seem super welcoming, so I thought I'd come here for a bit of advice. I have come into possession of my father's Dual 505-1 and I purchased a humble setup to start playing some records. Everything works great, plays nicely...
  16. J

    Nakamichi TA-4A in protection mode and problem with voltage in the 18v rail

    My Nakamachi TA-4A: the problem was that the left channel had less sound that the righ one, so i check it and what i found is that the difference in audio was originating in two parts: one: in the out of the volume pcb, with the osciloscope i check it and there was a little difference in the...
  17. Oscarshock

    How does the amp produced around 2000 compare the amp produced nowadays?

    Basically, I realized that this is a difficult question to answer. But I am actually wonder how people will response in different scenarios. Personally, this question comes to my mind because I am looking to replace my current integrated amp (Denon Pma-600ne ) with a older power amp (Myryad ma...
  18. michaelm101

    Continuous Vintage Failure: Please Recommend New "Modern" Amp

    I still have my old Kenwood KA-5700 I was awarded for straight "A"s in the fifth grade and I have fond recollections of going to the Federated Group and Cal Stereo dreaming about other gear. I've since collected several other amps/receivers of the 1970s era of Japanese crafted stereo gear. BUT...
  19. T

    Akai am-67 opinions? (And others in the range)

    I just brought home an akai am-67 integrated amplifier that I bought at a local record shop I often buy equipment from to restore and resell. I was very curious about this akai amplifier as I had never heard any of the amps in this series of akai gear before. I cleaned the pots and just did some...
  20. T

    yamaha rx-500 receiver no sound?

    I have a yamaha rx-500 receiver that does not work. Initially the relay didn't click in, I noticed there was quite a bit of corrosion around the filter caps and transistors so I took all those off, cleaned the area, restored some of the connections and tested for shorts on the transistors. All...
  21. E

    Pioneer SA-606 noisy output

    Hello to everyone, I have a problem with my SA-606 (SA-6700 version for Europe): There is an hiss similar to white noise through the headphone output. In the past I did some maintenance: 1) Recapping - used Nichicon "audio grade" KA series (light blue sleeve) for everything but main filters...
  22. E

    Pioneer SA-606 noisy headphone output

    (moved to Pioneer audio - my bad)
  23. mbphotox

    LF pretty amp with VU meters and plenty of power and good value

    I only have my Pioneer AV-R to drive the B&W N803 at the moment. There's also my EL34 tube amp, but I'd rather not damage that baby, I guess (through using it constantly, I mean). Also, there's a little minime on the way, so the tube amp will likely have to disappear into storage for a couple...
  24. J

    NEED! Portland or Seattle McIntosh Techs?

    Does anyone have any recommendations for professional competent audio techs with experience working with McIntosh gear? Seems harder than I’d expect so please let me know if you know a good tech or two.
  25. A

    Akai AM-35 amplifier suddenly stops sounding or sounding extremely bad/low on one channel

    Hello everyone! First time posting here. I've read many threads and after not being able to get help elsewhere, I've created an account and am now posting here. To keep it short and simple, I bought an amplifier, brand Akai, model AM-35 (apparently it was sold in the UK and Germany). It sounds...
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