12AU7 -> 6CG7 Use and LEDs

tvr2500m

New member
I don't have any issues with the 12AU7. I've had experience with it forever in other gear, as well as the Crack. Also, using the 6CG7/6FQ7 forever I have a lot of them and really like this tube. I'd like to try the Crack with the 6CG7.

I've got the pin mapping down to connect the 6CG7. I have a question about the HLMP6000 LED. These are used to bias the tube to 1.56V, or close, like 1.6V according to the datasheet. The two LEDs are connected to pins 3 and 8, the cathodes, of both the 12AU7 and 6CG7; it's the same. Is there any need to change the value of the LED from the 12V tube to the 6V tube? Can I use the HLMP6000 for the 6CG7?

Thanks.
 
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