A couplate is a circuit package consisting of resistors and capacitors on a small circuit board that has been encapsulated. It has up to 5 wires coming out of it and is sort of brown in color. The one in question is about 1 inch by 1 1/4 inch square. Some were made for pentodes, some for triodes and others for other applications.
And they make the audio sound like crap. That's the main reason the stock Globe King 500 audio is so restricted. Better to use conventional descrete plate and grid resistors and coupling caps. You can control the frequency response by the values of resistance and capacitance. The best way to improve Globe King audio is to get rid of the couplettes.
Don K4KYV
