10k LCR - that was fun.

Today we installed the 600ohm LCR modules. Just remove the RC RIAA and drop in the modules. This takes advantage of the very low output impedance of the Universal Tube Stage (UTS) (50-100ohms). Adding a series resistor to the input side to bring the load that the first stage sees up to 600ohms allows us to direct couple. So...exchange one 2.2uf capacitor for one series resistor. Make it a good one.

On the output side we need a decoupling capacitor - ~0.47uf in value. Again quality matters in this position so best use the best - teflon, polystyrene, silver - because you can hear the quality in this position. It won't be wasted. We used polystyrene.

Done. Playing now. First few minutes were a bit splashy sounding but settling in nicely. From 20hz-25khz we're at -0.5db which is as good as it gets with LCR.

LCR's impress with their open sound and huge dynamic swings.

This will be our new UTS Phono Max. It is EZ enough and we will release it as a kit. Instruction manual to be written.