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imhififan

Responses from imhififan

Audio signal sensing auto on/off switch
If the sources have 12V trigger output, you can use a relay controlled outlet for your subwoofer amp. https://www.adafruit.com/product/2935?gclid=EAIaIQobChMI8Zmxyvum_AIVgBXUAR1UAAuGEAQYAiABEgJM7vD_BwE  
Voltage conversion of Accuphase E-650
@jsch9876  Hi Jason, E-650 and E-800 are class A integrated amplifier, the E-380, E-4000 and E-5000 are class AB integrated. Sorry I have no experience of E-5000 voltage conversion, I think its power board is different from E-650 and E-800. May... 
Testing a MC phono cartridge
I have a new Kiseki Purple Heart that may have lost one channel in transportation. How do you know it lost one channel without playing it? Best way to test is swap the leads from one channel to other and play it for testing, if the dead channel... 
Singer HE-2200 Kids Record Player
But barring that bit of good luck I’m hoping someone can suggest a very simple (and cheap!) amp module that I can put in. It would need to work with a ceramic cartridge. You can find a LM386 amplifier module at DigiKey.com, however, you still n... 
life span/failure rate of filter capacitors?
I have been looking on line (including Partsconnexion) trying to find the value I need (400 v, 560 uf) with screw in terminals, but I cannot find anything matches. 400V is the minimum, higher voltage rating is better. Mouser has some 560uF 550V... 
Advice & thoughts on DIY Recap/Restoration of vintage amp/equipment
Check the relay contacts, or just simply replace the relay since it is more than 30 years old. Dirty relay contacts is a common problem in vintage gears.    
Voltage conversion of Accuphase E-650
Victor, I'm glad you figured it out. 👌✌👍  
Voltage conversion of Accuphase E-650
Two possibilities: 1. The incandescent light bulb too low in wattage 2. Short circuit @zeptul According to the specs E-650 draws 168 watts @ idle. Please try a 250 or 300 watts bulb. If that does not light up the amplifier, you need to check ... 
Voltage conversion of Accuphase E-650
When the amplifier is turned on through an incandescent lamp, the amplifier indicators do not light up. It should be? What’s the wattage of the incandescent lamp?    
Hum on Tube Amp - Can't find source
would speaker feedback do that? IRS Beta  @ervikingo  Have you tried connect a different pair of speakers on your Manley Snappers?      
Krell Fpb 300 engage capacitor for tube preamp
@null1  IIRC, the jumpers are between the two yellow capacitors, can you post a close up image?    
Accuphase A-65 Voltage Conversion (100V to 120V)
Yes! 👍  
Accuphase E-408 voltage conversion
Glad everything went well! Cheers 🥂  
Accuphase E-408 voltage conversion
@zeptul  Looks perfect! The bulb lit up in the first second is due to inrush current  as long as it dim down after that. It is perfectly OK!  Please go ahead plug it in directly to the mains outlet.  
Accuphase E-408 voltage conversion
@zeptul  For the soft start resistors, J3 provides highest resistance and should be good for 220V/240V mains, therefore no changes required.