Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Swampertech on October 10, 2019, 09:02:53 am

Title: New bias board
Post by: Swampertech on October 10, 2019, 09:02:53 am

Hey Doug, I'd like to create a new bias board, but your program doesn't allow a board to be less than 5" long X 3.125" tall. My board would be 2.35" X 3.125". Is there a solution?

Title: Re: New bias board
Post by: shooter on October 10, 2019, 09:17:06 am

I had 2 identical circuits laid out n turreted by Doug, then I used the dremel to cut the board in 1/2.

Title: Re: New bias board
Post by: Swampertech on October 10, 2019, 09:25:08 am

Shooter, I saw Doug had some bias boards that were not 5" long. I may have to do as you said and cut them myself.

Title: Re: New bias board
Post by: PRR on October 10, 2019, 11:00:50 am

His board cuts easily with a hacksaw. It's been a while, but I ordered a long length and cut-up into four short lengths for a fusebox-conduit hack. I don't remember the slicing; boring the 2" holes was mildly memorable.

Fine tooth blade. A dust-mask is wise.

Title: Re: New bias board
Post by: tubenit on October 10, 2019, 11:21:29 am

Quote

His board cuts easily with a hacksaw

+1       Been doing it that way for yrs...………      easy, quick and little dust

With respect, Tubenit

Title: Re: New bias board
Post by: pompeiisneaks on October 10, 2019, 12:28:59 pm

Yup agreed, I just did my bias board and my main board on the same turret board and then cut off the bias board.  Worked perfectly for me. 

If you don't see any specific need for 'longer' you can just make it the minimum length and leave part of the board empty?  I do make my own now, but because I wanted to try and see how it worked, but having him do it was always TONS easier :D

~Phil

Title: Re: New bias board
Post by: Swampertech on October 10, 2019, 12:59:09 pm

Thanks guys, I just ordered two filter cap boards and two bias boards, laid end to end.