11-01-2013, 08:30 PM
Hello:
Anyone out there familiar with the Zenith 5R312.
Documentation is pretty bad on this.
http://www.nostalgiaair.org/PagesByModel...024984.pdf
Radio works,nothing getting overly warm.
I replaced all the caps and most resistors.
When I checked voltages, they looked higher than schematic.
Voltage from transformer to rectifer plates measure 568V. Pins 3 and 5 together. Dont know if that is how you should test this.
Rectifer tube pin 3 lists @ 160V AC, im getting 283V AC.
Rectifer tube lists pin 8 @ 180V DC, Im getting 240V DC
On Output tube pin 3 lists @ 170V DC , im getting 225V
On output tube pin 4 lists @ 180V DC, im getting 239V
Tried a whole new set of tubes and no significant diff.
Measuring with a digital VOM....Schematic said to use a 1000 ohm per volt meter
Anybody out there worked on this radio?
Thanks,
Buzz
Anyone out there familiar with the Zenith 5R312.
Documentation is pretty bad on this.
http://www.nostalgiaair.org/PagesByModel...024984.pdf
Radio works,nothing getting overly warm.
I replaced all the caps and most resistors.
When I checked voltages, they looked higher than schematic.
Voltage from transformer to rectifer plates measure 568V. Pins 3 and 5 together. Dont know if that is how you should test this.
Rectifer tube pin 3 lists @ 160V AC, im getting 283V AC.
Rectifer tube lists pin 8 @ 180V DC, Im getting 240V DC
On Output tube pin 3 lists @ 170V DC , im getting 225V
On output tube pin 4 lists @ 180V DC, im getting 239V
Tried a whole new set of tubes and no significant diff.
Measuring with a digital VOM....Schematic said to use a 1000 ohm per volt meter
Anybody out there worked on this radio?
Thanks,
Buzz
