I replaced an open burned out 1 1/2 amp fuse on a Sherwood S-3000 tuner and it came on and audio works fine. Driving sound off PCV speakers. However the 6BR5/EMBO tube initially worked and the screen beam expanded and responded as signal strength. However after a few hours of operation only see the filament illuminating the narrow band on the central axis of the phosphor screen but no beam widening on station tuning. What controls the deflection anodes on the tube or has the tube itself gone defective? Any thoughts on this would be helpful. Again there is no audio problem, only the loss of 6BR5 beam deflection response on tuning. All the components on this tuner are original (1959 vintage) and I was surprised it worked at all after being in storage about 40 years. Yet the fact that the 6BR5 stop responding suggests another issue that could come up later? Again all components except the fuse are 1959 original including the can cap. i am the only owner and the unti never had work done. Any suggestions of which part of the circuit controls the 6BR5 anode? Seems unlikely that the tude suddenly went defective? Again filament and phosphor screen raster are intact but only narrow beam on the central screen axis and no tuning response. Thank you for any suggestions of how to trouble shoot. Paul
List it as an auction on eBay with the amount you want to get minus fees, etc as a reserve. See what happens. If it doesn't meet the reserve it you know it isn't worth that
I replaced an open burned out 1 1/2 amp fuse on a Sherwood S-3000 tuner and it came on and audio works fine. Driving sound off PCV speakers. However the 6BR5/EMBO tube initially worked and the screen beam expanded and responded as signal strength. However after a few hours of operation only see the filament illuminating the narrow band on the central axis of the phosphor screen but no beam widening on station tuning.
What controls the deflection anodes on the tube or has the tube itself gone defective? Any thoughts on this would be helpful. Again there is no audio problem, only the loss of 6BR5 beam deflection response on tuning. All the components on this tuner are original (1959 vintage) and I was surprised it worked at all after being in storage about 40 years. Yet the fact that the 6BR5 stop responding suggests another issue that could come up later? Again all components except the fuse are 1959 original including the can cap. i am the only owner and the unti never had work done.
Any suggestions of which part of the circuit controls the 6BR5 anode? Seems unlikely that the tude suddenly went defective? Again filament and phosphor screen raster are intact but only narrow beam on the central screen axis and no tuning response.
Thank you for any suggestions of how to trouble shoot.
Paul
A good contact cleaner bath always help,been there.
i wish you would of showed how to get the cover off of it..
Easy. Remove the bottom screws, remove from case, remove screws on the sides holding the metal cover on the bottom.
I have a Sherwood S 708 to sell. Looks just like this one but I need to know how much it should sell for.
List it as an auction on eBay with the amount you want to get minus fees, etc as a reserve. See what happens.
If it doesn't meet the reserve it you know it isn't worth that
Great video !
Would the ground also be the same on the S-7800? meaning is the ground hooked up to the selector switch? like on the S-7200 anyone know?Thank you
what type of light bulb do i need . or go led light?
vinylsniffer search on Google and follow the AudioKarma links
Scope looks much better :)
Great video! Thank you.
Nice and interesting information. :)
nice
Ummm how to remove the cover....that's literally the only tutorial I need! I'm 0 for 2 now lol
The new deoxit can design is a piece of crap it leaks every time you spray.
shaky cam...