trinityamps.com

Hello, I'm new to the form and I'm trying to install the Trinity FX loop to my TC15. I've had a friend help me who is far more versed in reading and understanding schematics but he can't figure out why we get high pitched oscillations and squealing when the amp is turn on.

I'm sure the picture may explain a lot and hopefully someone can clearly point out the error(s) but here is what I can describe based on my limited knowledge:

- The heater wires are connected to the first output tube.
- the input and output is connected after the Treble on the board with coax (green wires to ground). hopefully the picture shows
this better that I can explain
- the yellow is the B+ but not sure if this is the correct location.

The schematic with "X" we we found online somewhere which show where to connect post treble control.

thanks in advance and my apologies for my lack of knowledge and poor description.

Thanks

Well, I was able to figure it out. It was not grounded in the right location and I relocated the B+ to the V3 position and replaced the 22k resistor with the provided 15k to bring the voltage back and everything appears to be functioning properly.

It was easy for me to understand. After moving the B+ to the V3 position and switching out the 22k resistor for the supplied 15k, I was able to restore voltage and everything seems to be working correctly.
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