View Single Post
  #8  
Old 09-24-2016, 09:48 PM
walterbeers walterbeers is offline
Old TVs are better!
 
Join Date: Jun 2011
Location: Omaha NE
Posts: 463
Here is some updated info. Even though I couldn't find a schematic download for the VM560A for free of the amplifier, if you go to this e-bay site, the front of the Sams is posted on there, which also shows the amplifier schematic. Hover over the front of the page and its quite readable. If no sound on the first unit suspect R17 470 ohm 2 watt resistor and see if that is open and/or burn't. You should have slightly over 200 volts at both ends of the resistor. Also C1 the filter capacitor can. That may have taken out the resistor. It has a great amplifier for a small table top record player. Two 6V6 output tubes in push pull should give you plenty of power and volume. Looks like there is also a muting switch somewhere that mutes the record changer probably somewhere on the turntable. It might be to mute the sound when the changer is cycling, or a manual switch to switch from phono to the external input.

http://www.ebay.com/itm/1957-V-M-560...-/272322002175
Reply With Quote