[sdradioman]

Does anyone know if they made a seperate schematic for the 48-200 code 121? The only one I can find is for the code 125 which uses a 35Y4 rectifier and a 50L6 output. The code 121 uses a 35Z5 and a 50A5... I am having issues with motorboating from 530 to around 650 KC and then after that is is okay up to 1600 KC. I was wanting to test voltages but the schematic only shows testing points for the 35Y4/50L6 circuits. I also have an extra .05 mF capacitor that is not in the 125 schematics... Was just wondering if there was ever a code 121 schematic?

[KCMike]

Hello, I just checked the riders manual I have on my computer and it mentions the code121 and states
"Code 121 of the three models is identical to code 125 with the following exceptions." It then mentions the tube difference you already know about. So I think you can use the measurements of code 125.
Where is the .05 capacitor you have in the circuit?