Replace 6T7 with a 1H6 Tube

6/8/2011 7:06:34 PMBob.

Rider 9-45, how would I rewire this for a replacement 1H6 tube? Want to convert from battery to electric.

6/8/2011 11:16:27 PMCarl T

:Rider 9-45, how would I rewire this for a replacement 1H6 tube? Want to convert from battery to electric.
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Rider's 9-45 for which manufacturer?
Carl T

6/9/2011 7:47:48 AMBob

Sears; 9-45

6/9/2011 11:43:50 AMCarl T

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:Sears; 9-45
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Link to schematic:
http://www.nostalgiaair.org/PagesByModel/151/M0017151.pdf

6/9/2011 12:02:55 PMClifton

Bob,

Why don't you just construct a power supply for it to provide 6 volts at around .3 amp and 120 to 125 volts DC. You can disconnect the 6 volt input to the vibrator and disconnect the B+ lead from the HV transformer. Then connect your homemade power supply.

Clifton

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:Sears; 9-45
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6/9/2011 12:45:55 PMBob

Clifton; The 6T7 has a 6.3 v fil, other tubes run on 2v each so my idea was to replace 6T7.

6/9/2011 1:51:38 PMClifton

Bob,

The other tubes filaments are in series and add up to 6 volts or so. They are across the 6 volt input as is the 6T7. The total filament current is around .27 amp or 270 milliamps. Building a power supply for it and disconnecting the vibrator power supply would not modify the radio as should you decide to get rid of the radio sometime later, you could hook the original power supply back up and it would be back as originally manufactured.

Clifton

:Clifton; The 6T7 has a 6.3 v fil, other tubes run on 2v each so my idea was to replace 6T7.
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