Hi everyone. Well, it's the first time I've come across a tube I can't seem to find reference to on my Hickok 533A's internal roll or supplementary list of obsolete tubes. Certainly lots of 1920's radios used 201's (01's) but I cannot find the setup info. Anyone out there know the settings I would use to test these on a Hickok 533A?

Thanks in advance.
-George

Hi George

Don't have the settings but this will work. The 201A, 01A is similar to #26 but has a 5 volt filament. Test your 201A as a 26 and increase filament voltage from 1.5 to 5 volts.

Norm

: Hi everyone. Well, it's the first time I've come across a tube I can't seem to find reference to on my Hickok 533A's internal roll or supplementary list of obsolete tubes. Certainly lots of 1920's radios used 201's (01's) but I cannot find the setup info. Anyone out there know the settings I would use to test these on a Hickok 533A?

: Thanks in advance.
: -George

: Hi George

: Don't have the settings but this will work. The 201A, 01A is similar to #26 but has a 5 volt filament. Test your 201A as a 26 and increase filament voltage from 1.5 to 5 volts.

: Norm

: Hi Norm. Doesn't the #26 have a much higher plate voltage and slightly different bias voltage on the grid? I'm worried this will damage my tube (especially the higher plate voltage). Either way, the higher plate voltage will give me inaccurate results on teh '01 won't it?

: : Hi everyone. Well, it's the first time I've come across a tube I can't seem to find reference to on my Hickok 533A's internal roll or supplementary list of obsolete tubes. Certainly lots of 1920's radios used 201's (01's) but I cannot find the setup info. Anyone out there know the settings I would use to test these on a Hickok 533A?

: : Thanks in advance.
: : -George