Hello All,
Now that I have solved the B+ problem, I have a raster. It doesn't have quite enough vertical deflection. I have replaced all the HV capacitors and any other paper types with film types. I may have too high a value of dropping resistor in the 1N400x diode. I chose a 10 watt 100 ohn resistor. If less than 200 mA is necessary, I would think that that that would be fine. Maybe whoever "restored" this set used the wrong values of resistors or electrolytic capacitors. I see 200 mf instead of 220 mf on both sides of the filter choke. I think that once this is gone through and corrected, all will be well.
Please help if you can.

Thanks,

Dave

Hello Again All,
I made a typo. I typed ohm but it came out ohn. Sorry about that.

Dave
:Hello All,
: Now that I have solved the B+ problem, I have a raster. It doesn't have quite enough vertical deflection. I have replaced all the HV capacitors and any other paper types with film types. I may have too high a value of dropping resistor in the 1N400x diode. I chose a 10 watt 100 ohn resistor. If less than 200 mA is necessary, I would think that that that would be fine. Maybe whoever "restored" this set used the wrong values of resistors or electrolytic capacitors. I see 200 mf instead of 220 mf on both sides of the filter choke. I think that once this is gone through and corrected, all will be well.
: Please help if you can.
:
:Thanks,
:
:Dave
:

I'm not familiar with your set's circuitry so this is a total wild guess. Low boost (if this set has boost) can cause inadequate vertical sweep. This can be an obscure problem since it often doesn't bother anything else.

:Hello Again All,
: I made a typo. I typed ohm but it came out ohn. Sorry about that.
:
:Dave
::Hello All,
:: Now that I have solved the B+ problem, I have a raster. It doesn't have quite enough vertical deflection. I have replaced all the HV capacitors and any other paper types with film types. I may have too high a value of dropping resistor in the 1N400x diode. I chose a 10 watt 100 ohn resistor. If less than 200 mA is necessary, I would think that that that would be fine. Maybe whoever "restored" this set used the wrong values of resistors or electrolytic capacitors. I see 200 mf instead of 220 mf on both sides of the filter choke. I think that once this is gone through and corrected, all will be well.
:: Please help if you can.
::
::Thanks,
::
::Dave
::
:

Boost,
This is a hot chassis, electrostatic TV. Yes, the higher voltage for the plates in the vertical output tube comes from the flyback transformer. Maybe the current limiting resistor I'm using is too high on the 1N400x rectifier diode. Maybe it should only be 50 ohms instead of 100 ohms or the vertical output tube is weak. I'll test it (I doubt it's weak though). Then I'll lower the dropping resistor to 50 ohms and see if that helps.

Thanks,

Dave
:I'm not familiar with your set's circuitry so this is a total wild guess. Low boost (if this set has boost) can cause inadequate vertical sweep. This can be an obscure problem since it often doesn't bother anything else.
:
::Hello Again All,
:: I made a typo. I typed ohm but it came out ohn. Sorry about that.
::
::Dave
:::Hello All,
::: Now that I have solved the B+ problem, I have a raster. It doesn't have quite enough vertical deflection. I have replaced all the HV capacitors and any other paper types with film types. I may have too high a value of dropping resistor in the 1N400x diode. I chose a 10 watt 100 ohn resistor. If less than 200 mA is necessary, I would think that that that would be fine. Maybe whoever "restored" this set used the wrong values of resistors or electrolytic capacitors. I see 200 mf instead of 220 mf on both sides of the filter choke. I think that once this is gone through and corrected, all will be well.
::: Please help if you can.
:::
:::Thanks,
:::
:::Dave
:::
::
: