I've been blessed!

[jshorva65]

I'm also looking for info on how to fabricate the correct mounting brackets for retrofitting a glass 21FBP22 (actually a delaminated 21FJP22) in place of an (aired) metal 21AXP22 to restore a Sylvania model 31C304M, hopefully without hacking up the shroud used with the 21AXP22, thus making the retrofit reversible in case a fix for leaker 21AXP22's becomes available.

Another question I hope someone here can help answer is whether anyone has data on feasibility of making an adaptor for use in bench testing an early 21" color chassis with a test rig.

I have the GTE/Sylvania CK-3000 test rig and know someone with a TeleMatic rig. For both units, the earliest color chassis supported directly by its adaptor complement was the RCA CTC-7. If a correct set of Yoke Program, Convergence Ballast, and Yoke Cable characteristics could be determined, then the use of test rigs would help simplify these early sets' restorations greatly. It would seem that the correct yoke wiring harness could be as easy to create as making an adaptor to mate the leads of the existing "roundie" yoke harness to the correct plug for the older chassis. That would leave only the correct Yoke Program and Convergence Ballast values and pinouts to be determined, since the CRT cable should be directly compatible with all 21" color tube applications.