AudioNervosa

Systemic Development => Amplification and Preamplification => Topic started by: Folsom on February 23, 2018, 12:20:32 PM

Title: Folsom Teaser
Post by: Folsom on February 23, 2018, 12:20:32 PM

Teaser (https://image.ibb.co/k27sSc/20180223_121524.jpg)

Title: Re: Folsom Teaser
Post by: Nick B on February 23, 2018, 02:27:11 PM

Teasing is not allowed. An explanation is mandatory......how about it?? 🙏
Nick

Title: Re: Folsom Teaser
Post by: Folsom on February 23, 2018, 03:00:50 PM

Well...  it's around 60/120w 8/4ohm.

Title: Re: Folsom Teaser
Post by: P.I. on February 23, 2018, 06:23:11 PM

Dude!

For all of the "Mo' powa' " I think you have our attention.

Cool.

Title: Re: Folsom Teaser
Post by: richidoo on February 23, 2018, 08:27:59 PM

Ghost in the Machine   8)

Title: Re: Folsom Teaser
Post by: Folsom on February 23, 2018, 08:32:39 PM

I'm doing some finalizing but my hopes are to get commitments for boards by next week, so I can order ASAP. 

Have to move a few things around on the PCB before printing.

The PSU will work well with two Antipoles bottom to bottom, spaces, and L brackets. You connect the + and - on one of them to form a PG, and then run wires off of the + and - left over to the amp.

It needs way more heatsink than I have in the picture. This one can use one of those cases that has heatsink walls. Maybe a copper bar heat spreader is wise too.

The feedback can have different character based on different caps, but I think I'm settling on one that has real punch, real texture, real dynamics. It sounds good in other ways too. Another cap sounds euphoric, another is insanely refined...  :rofl:

The feedback operates either on 9v or solarcells. I'm looking at doing a DC offset prevention thing, because you can get up to .5v DC offset when the battery dies (lasts for a number of months, maybe more, not sure).

Title: Re: Folsom Teaser
Post by: rollo on February 24, 2018, 09:13:27 AM

  Cool.  8)


charles

Title: Re: Folsom Teaser
Post by: Folsom on February 26, 2018, 02:29:24 AM

http://www.diyaudio.com/forums/group-buys/319331-folsom-ec7293-battery-solarcell-powered-feedback-60-120w.html#post5354054

Title: Re: Folsom Teaser
Post by: Nick B on February 26, 2018, 07:58:26 AM

Quote from: Folsom on February 23, 2018, 08:32:39 PM

I'm doing some finalizing but my hopes are to get commitments for boards by next week, so I can order ASAP. 

Have to move a few things around on the PCB before printing.

The PSU will work well with two Antipoles bottom to bottom, spaces, and L brackets. You connect the + and - on one of them to form a PG, and then run wires off of the + and - left over to the amp.

It needs way more heatsink than I have in the picture. This one can use one of those cases that has heatsink walls. Maybe a copper bar heat spreader is wise too.

The feedback can have different character based on different caps, but I think I'm settling on one that has real punch, real texture, real dynamics. It sounds good in other ways too. Another cap sounds euphoric, another is insanely refined...  :rofl:

The feedback operates either on 9v or solarcells. I'm looking at doing a DC offset prevention thing, because you can get up to .5v DC offset when the battery dies (lasts for a number of months, maybe more, not sure).

What are the caps that give the different sonic characters?
Nick

Title: Re: Folsom Teaser
Post by: Folsom on February 26, 2018, 09:15:08 AM

The ones in the feedback. I've settled on the one I like the most, but I will list one as an option that has interesting "euphoric" qualities. I'll list a little header plug that fits easily for swapping too. But sound is improved some by having shorter leads without a header or extra cap leads.

Title: Re: Folsom Teaser
Post by: P.I. on February 26, 2018, 11:02:24 AM

Jeremy,

I'm always impressed with the thought that goes into all of your boards and designs.  I'm looking forward to this bad boy.

I'll be in touch end of the week about getting one or two.

Keep it up, my friend!   :thumb:

Title: Re: Folsom Teaser
Post by: Folsom on February 26, 2018, 11:26:14 AM

Sounds good. I'm hoping moment builds quick!