Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: labb on July 28, 2016, 10:16:53 am

Title: Master Volume for AB763 lite
Post by: labb on July 28, 2016, 10:16:53 am

I want to add a pre pi MV to my AB763. I built it per Sluckey's design with the exception that I do not have R14 installed. do have C6 coupling cap and R13. Would it matter if in put the pot before or after R13. Putting it between C6 and R13 makes the wiring a lot simpler. Tks.


file:///C:/Users/thomas/Downloads/SLuckey%20AB763_Deluxe_Lite%20(15).pdf

Title: Re: Master Volume for AB763 lite
Post by: shooter on July 28, 2016, 11:03:22 am

you could probably make R14 a pot, say 500K and see how it works, if it's always on 10, replace it with a fixed R.

Title: Re: Master Volume for AB763 lite
Post by: sluckey on July 28, 2016, 12:16:51 pm

I used a 100K pot on my TDR...

     http://sluckeyamps.com/tdr/tdr.pdf (http://sluckeyamps.com/tdr/tdr.pdf)

BTW, the link you posted points to a file on your own computer. It's not available to us.

Title: Re: Master Volume for AB763 lite
Post by: labb on July 28, 2016, 01:00:30 pm

Thanks for the info...as to the link, sorry. I'm not much on computers..Thought I had copied and pasted that correctly.