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Model 90 weak high end
#5

Radioroslyn:  OK-osc tracks from 720kc to 1630kc but not at constant level:  low end 720 = 140mv signal//high end = 60mv signal tracking linearly end to end.  Changed out 24A 1st det tube = no change.  Local station @ 550kc is loud and clear at 550kc on dial.  600 padder responsive.  Am I nuts or isn't signal normally stronger at the high end than the low end - this seems reversed??  I dismounted the 4 stage variable capacitor to clean it up and especially to renew the 3 rubber mounts to the chassis.  While I was at it, I replaced all the wires from the stator sections and the rotor.  Something tells me I need to double-check how I wired those new wires.  I carefully checked to be sure the stator sections went to the proper coil pins.  What now, coach?? Thanks, Steve


Messages In This Thread
Model 90 weak high end - by skykng - 06-09-2020, 06:42 PM
RE: Model 90 weak high end - by Radioroslyn - 06-10-2020, 12:28 PM
RE: Model 90 weak high end - by Phlogiston - 06-10-2020, 12:38 PM
RE: Model 90 weak high end - by skykng - 06-10-2020, 05:06 PM
RE: Model 90 weak high end - by skykng - 06-10-2020, 06:16 PM
RE: Model 90 weak high end - by Radioroslyn - 06-10-2020, 07:42 PM
RE: Model 90 weak high end - by skykng - 06-10-2020, 09:27 PM
RE: Model 90 weak high end - by Tim Tress - 07-05-2020, 04:41 PM
RE: Model 90 weak high end - by skykng - 07-05-2020, 06:01 PM
RE: Model 90 weak high end - by tubejockey - 08-21-2020, 03:21 AM



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