Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Misc Schematics and Layouts => Topic started by: tubenit on October 27, 2016, 06:26:42 am

Title: AC30/4
Post by: tubenit on October 27, 2016, 06:26:42 am

Lots of collaborative effort on this magnificent build.   Steve (Sluckey) helping pompeiisneaks with schematic and layout.

Thread is here:   http://el34world.com/Forum/index.php?topic=20313.0 (http://el34world.com/Forum/index.php?topic=20313.0)

Title: Re: AC30/4
Post by: tubenit on October 27, 2016, 06:27:50 am

G.Hoffman,  Gabriel,  contributed this.

Title: Re: AC30/4
Post by: roseblood11 on February 12, 2017, 04:12:29 pm

Quote from: tubenit on October 27, 2016, 06:27:50 am

G.Hoffman,  Gabriel,  contributed this.

That looks great - although it's hard to read.
Is there any more info about that version? Has anybody built it?
I wonder, why there's so much filtering in the power supply, and why are there two 100uF caps in series? Is there an advantage over only one 47uF?

regards, Immo

Title: Re: AC30/4
Post by: smackoj on March 06, 2017, 12:07:18 am

If I ever decide I am going to 'paint my masterpiece' like Bob Dylan wrote, then this AC30.4 would be my attempt. That is some high quality H2O as the venerable Water Boy exclaimed. I know I would not have the confidence to attempt this build but I will keep my eyes open for someone wanting to sell one at a gentleman's price.   :icon_biggrin:

Title: Re: AC30/4
Post by: sluckey on March 06, 2017, 06:52:18 am

Hoffman can make the board for you. Then it's mostly paint by numbers.

Title: Re: AC30/4
Post by: pompeiisneaks on March 06, 2017, 06:58:34 pm

In the original thread I did a demo of the final build, hopefully the tone sounds good :) (but I don't know about the other AC30, that one seems like an AC30/6 to me, I see 6 inputs not 4).

~Phil