Quote:
Originally Posted by DavGoodlin
True for the rectangular sets using a yoke plug. None of the 21" round sets used an interlock in the B+ as those did, all were connected with the familiar Red and Blu for Horz and for vertical, Yellow and Yellow with a Black-stripe all individual leads.
Sams did not show (dotted line) that the CTC20C has the Yel/Blk lead grounded! I lit the 6DW4 damper tube up when mis-wired the yoke leads initially  |
Out of curiosity I have looked at almost all RCA CTC schematics, (sams), and noticed that almost all but the 20, power the horz from the vert output transformer, ( GRN tap ) , often from the far side of the centering pot, at first I thought this was a bit strange, cause it would feed vert pulses into the damper circuit and so on, then I realized they are using this as some sort of safety feature, and that most likely any pulses would get filtered out by the coils the have before the damper anyway, but what they are doing is, vertical centering (10 ohms) + vertical yoke winding (23 oms ish ) allows horz to energize, but remove it, and HV/ HORZ cuts out, to prevent screen burn.