For the power supply for this model (power supply model # 9P6) shows a ballast in the 110Volt line. Can you tell me what part I should order to replace this ballast. schematic says only BLACK.

The part is rarely available to-day. Substitutes are shown in my Ballast Tube Handbook, sold by www.tubesandmore.com, but I cannot find the book right now.

With to-day's fairly steady voltages, you can simply substitute a resistor for the ballast (you can even put the resistor inside of the old ballast). You can also repair the ballast by using the nichrome wire from an old toaster. Another option would be to use a multi-tap transformer as a choke (select the appropriate tap). You could even wind your own transformer by trial and error, though that can be tedious. Roughly you want something equivilant to the secondary in a 12 volt doorbell transformer.

For true ballast action, a very high wattage lightbulb would work, and would automatically regulate for voltage fluctuations, though, like I said, that shouldn't be a problem for you. My Majestic 180 (very similar to the 90) was missing its power supply. I built a power supply using random surplus parts, and the power supply I built uses no ballast (the transformers I selected are designed to work directly from a 120 volt source). It works very well, and the radio works well no matter what time of year it is (whether the line voltage is 117 or 124).

Thomas

:The part is rarely available to-day. Substitutes are shown in my Ballast Tube Handbook, sold by www.tubesandmore.com, but I cannot find the book right now.
:
:With to-day's fairly steady voltages, you can simply substitute a resistor for the ballast (you can even put the resistor inside of the old ballast). You can also repair the ballast by using the nichrome wire from an old toaster. Another option would be to use a multi-tap transformer as a choke (select the appropriate tap). You could even wind your own transformer by trial and error, though that can be tedious. Roughly you want something equivilant to the secondary in a 12 volt doorbell transformer.
:
:For true ballast action, a very high wattage lightbulb would work, and would automatically regulate for voltage fluctuations, though, like I said, that shouldn't be a problem for you. My Majestic 180 (very similar to the 90) was missing its power supply. I built a power supply using random surplus parts, and the power supply I built uses no ballast (the transformers I selected are designed to work directly from a 120 volt source). It works very well, and the radio works well no matter what time of year it is (whether the line voltage is 117 or 124).
:
:Thomas

Bud,
I have one from an old junker set I have been giving parts away for some time. If you want it, email me your address.
Jon.