• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Mike Freda 5670 DIY from Youtube

I need a new preamp, and I want to to build a DIY preamp like Mike Freda did. Have collected parts like output transformers from Edcor, tubes...Trying to buy the HLMP-6000 LED, for the ccs, but it is difficult to obtain. Are there any equivalents to the HLMP-6000? Data for the LED are 1,6v and 10 mA. Kan I use any other LED, but with the same data?