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Old 04-24-2023, 10:34 AM
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bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,822
All TS-4 versions prior to TS-4J use the 17A470303 ballast. It has an extra resistor only used in the very early revisions (prior to the TS-4H).

The other difference the is that the AC line in goes to pin 5.

It is connected to pin 6 in the later version of the ballast which is what you created.

So, you need to move the wore from pin 5 to pin 6 on the ballast tube socket. OR modify the ballast so the CL-90 goes to pin 5 instead of 6.
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