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K200-B2 Reverb Issue [message #28031] Tue, 16 February 2021 17:43   Guitar Guy Messages: 1 Registered: February 2021 Junior Member I have a K200-B2, with a reverb issue. The reverb tank is a 4EB2C1B, which appears to be incorrect based on other forum info, and what I have found on the internet. I believe the tank should be a 4FB2A1A. Can anyone confirm which is the correct tank please? I fired up my electronics test bench, and checked the reverb drive-jack on the PCB, there is drive to the tank when the reverb knob is turned on. I checked the output of the tank and it seemed to be really low. I "crashed-the-tank", and it could be faintly heard in the amp output. I removed the tank and substituted a coupling capacitor in its place, on a trial basis, and the reverb channel seemed to work just fine, with a 250Hz audio tone fed into the amp front panel. The reverb intensity control appears to function just fine, and the voltages on the spring-drive and output driver transistors to the PA appear to the track the voltages shown on the circuit diagram. BTW, if anyone out there has an amp with a ink marking on the front lip of the chassis that has RLV in the character string that shows the power supply voltage and testing date, that would be me. I worked in the final amp and radar test area at Kustom in the 1967 thru 1970 time frame, while attending college at PSU. Any assistance would be most appreciated! Report message to a moderator

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