I just finished this one the other day. after owning the original, this one sounds just like it but is a LOT smaller in an etched 125B:
(http://johnkvintageguitars.homestead.com/Effects/others/FrequencyAnalyzer/FrequencyAnalyzer-01.jpg)
(http://johnkvintageguitars.homestead.com/Effects/others/FrequencyAnalyzer/FrequencyAnalyzer-02.jpg)
Very nice! Excellent etch and it looks great with the polished enclosure.
I agree, that one is flawless
Beautiful etch!
That's etched??!! You guys are just taking this stuff to the next level!
Ooo an LTC1144, fancy!
WOW! Awesome looking build!
Your etches are amazing. I've been getting some pretty decent results but still not quite on that level.
Any chance you could share a quick run-down on your process?
Prep, masking technique, etchant used, time/temp, etc....
Would be greatly appreciated!
That is a pretty flawless etch. Looks fantastic and I'd bet it sounds nice too.
So great!!
I wanna build one now!
Looks fantastic, really.
That's a killer etch. Did you etch the polished enclosure or polish it after the etch? I've been wanting to do something this clean for a while.
This looks amazing. If that's an etch, it's one of the cleanest I've ever seen.
Perfection!
Quote from: Timko on July 26, 2016, 01:41:33 AM
That's a killer etch. Did you etch the polished enclosure or polish it after the etch? I've been wanting to do something this clean for a while.
thanks. first I sand the enclosure with a Makita orbital sander (150, 220 and 320 grits), then I block the face with 400 grit wet. then I etch it with acid magic, then I block wet sand the face with 600, 800, 2000 and finally with 12000 micro mesh. the block sanded 12K paper results with a polished finish.
Thanks for sharing.
Do you do your masking with toner transfer? (laser printer/glossy paper, what paper do you use?)
Also, how long do you let them etch? Do you do anything for agitation? What about temperature?
I don't mean to nag, I just really want to find a better method for clean etching. And yours sir are perfection!
Killer response. I think I need to get some sort of powered sander to get the imperfections out. Right now everything is done by hand.
Also, what's acid magic? I just ran out of my bottle of ferric acid and am interested to try something that doesn't stain everything in my basement.
Quote from: Timko on July 26, 2016, 03:00:17 PM
Killer response. I think I need to get some sort of powered sander to get the imperfections out. Right now everything is done by hand.
Also, what's acid magic? I just ran out of my bottle of ferric acid and am interested to try something that doesn't stain everything in my basement.
http://www.spadepot.com/Acid-Magic---Muriatic-Acid-Replacement-P662C634.aspx?zmam=55673001&zmas=1&zmac=1&zmap=CA1062&gclid=COehrPe0kc4CFQiSfgodma4CZw
That is immaculate.
Great build!
Quote from: johnk on July 26, 2016, 03:11:23 PM
Quote from: Timko on July 26, 2016, 03:00:17 PM
Killer response. I think I need to get some sort of powered sander to get the imperfections out. Right now everything is done by hand.
Also, what's acid magic? I just ran out of my bottle of ferric acid and am interested to try something that doesn't stain everything in my basement.
This stuff looks great! If you ever did Ferric Acid etching on aluminum, can you tell me if this acid acts similar?
http://www.spadepot.com/Acid-Magic---Muriatic-Acid-Replacement-P662C634.aspx?zmam=55673001&zmas=1&zmac=1&zmap=CA1062&gclid=COehrPe0kc4CFQiSfgodma4CZw
Quote from: Timko on July 28, 2016, 08:46:40 PM
This stuff looks great! If you ever did Ferric Acid etching on aluminum, can you tell me if this acid acts similar?
I've used ferric acid on aluminum, but acid magic is much, much better and faster.
I'm intrigued by that stuff. I wonder what it is, if it's obviously corrosive/low pH, but does not burn on your skin. Can't be the common acids like acetic, formic, nitric or sulfuric acid. They all smell and would burn on your skin.
It's definetly not this stuff: https://en.wikipedia.org/wiki/Magic_acid
QuoteAs with all strong acids, and especially superacids, proper personal protective equipment should be used. In addition to the obligatory gloves and goggles, the use of a faceshield and full-face respirator are also recommended. Predictably, magic acid is highly toxic upon ingestion and inhalation, causes severe skin and eye burns, and is toxic to aquatic life.
the MSDS for Acid Magic says its mostly Hydrochloric acid with "Undisclosed Buffers". As to what that buffer is, hard to say. I could shove some in a HPLC at work, but I doubt Id get approval for time on the machine for just "I'm curious", plus I have no clue what coil to use with it. Hrm.
Time to dig through some literature to see if I can suss it out!
Edit:
Ok so the buffer(s) contain, at the very least, some phosphate. Thats a start.