Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Papa Jim on May 19, 2018, 07:55:33 pm

Title: Turret Minimum Spacing
Post by: Papa Jim on May 19, 2018, 07:55:33 pm

When building a typical turret board for a tube amp with 500Vdc possible between turrets, what is a safe spacing between adjacent surface edge of turrets.

Title: Re: Turret Minimum Spacing
Post by: sluckey on May 19, 2018, 08:19:43 pm

I typically use 5/16" center to center spacing for Hoffman's turrets.

Title: Re: Turret Minimum Spacing
Post by: PRR on May 19, 2018, 09:29:49 pm

500V won't jump a sheet of paper.

Space to wrap wires without touching may be the practical limit.

But how many 500V nodes do you really have? Typically just a few. Be generous there.

Ask yourself what you hope to gain by violating a reasonable 5/16 spacing. I found that while resistors could be spaced closer, just a few caps makes even 5/16 tight.

Do not build stuff so tight that it can't be modified or repaired!!  I have been sorry too often.

Title: Re: Turret Minimum Spacing
Post by: Papa Jim on May 20, 2018, 06:14:57 am

Thanks guys for the advice.

Title: Re: Turret Minimum Spacing
Post by: sluckey on May 20, 2018, 06:49:04 am

I did this AC-15 board with 1/4" spacing so the board would be short enough to fit my chassis. 1/4" is tough to work with though. I still recommend 5/16" unless you have a special need.

(http://sluckeyamps.com/VAC15/06.jpg)