[IMEP]

Hi All,

I'm new to the headphone world and just registered on Head-Fi today, but I've been checking this site out for the last few months. I must say that I'm quite impressed with what I've seen so far.

I just finished building my first amp, a META42. It was a great learning experience to say the least. If it were not for this forum I would have never accomplished this much less known it even existed. I've already started collecting the parts for my second one! I definitely have the bug.

Special thanks to Tangent, for his input and his very informative website.

Attached are some pictures of my amp.

Is there a way to attach more than one picture on a post?

 

[IMEP]

Another picture!

 

[dd3mon]

Very nice! Great casework, I love those handles, makes it look like a mini-rackmount case!

Now you just gotta get some better cans for that amp

-dd3mon

 

[IMEP]

Yet another picture.

 

[IMEP]

...and another

 

[IMEP]

One more pic!

 

[IMEP]

Last one...I promise!

 

[IMEP]

Thanks dd3mon,

I haven't seen any other METAs with rack handles, so I thought they would make it a little more unique.

Hey, I like my KSC-35s!! Head-Fi introduced me to these inexpensive beauties.

I do plan to get something less portable in the future, but I'll definitely keep the Koss's. They're made just down the road after all!

 

[Voodoochile]

Very nice workmanship! Especially the rocker- they are a bit intimidating unless you work with metal often. The handles are actually quite practical for protecting the pot knob in transit.

Everything is very neat, and I notice you seem to have forgotten to put all the requisite scratches and dings that usually accompany the first build

. I'm sure you don't mind overlooking that minor shortcoming!

 

[IMEP]

Thanks Voodoochile,

I've read a lot of your posts. They have been quite informative.

I was also thinking one could attach a chain around the handles and hang it around their neck like a necklace!

The "fragile" finish on the Hammond enclosures is one complaint I have with them. Luckily, this forum warned me of this!

The cheesy self tapping screws is another complaint I have. I retapped all of the screw holes and replaced the screws with longer allen heads.

Otherwise I really like the looks of them.

I just realized that I should have posted the amp's vitals. I'll do that tomorrow.

 

[Nisbeth]

Very nice amp IMEP! If this is your first electronics project I'm not just impressed, I'm about to fall off my chair! I expect to see your next amp soon

/U.

 

[Sol_Zhen]

Nice clean job. Much neater than my Meta.

Good deal.

 

[Voodoochile]

Quote:

Originally posted by IMEP Thanks Voodoochile, I've read a lot of your posts. They have been quite informative.

You're thinking of someone else... maybe ppl or KurtW?

I had to say that before someone else did!

 

[IMEP]

Thanks for the comments Nisbeth and Sol_Zhen!

Here are the amps specs:

Op-Amp - AD8620 (Biased into Class A)

Resistors - 1/8W 1% Vishays
R1 - 499
R2 - 499K
R3 - 475
R4 - 4.75K
R5 - 2.21K
R6 - 499K
R7 - 100
R8/R9 - Jumpered
R10 - 475

ZNR - 7.2V (Turns the LED off just below 10V)
CRD - 2.5mA

C1 - .47uF 50V Panasonic Polypropylene film & foil
C2/C3 - 1500uF 25V Nichicon UPW series
C4 - 6.8µF 50V WIMA MKS-2
C5 - Open

The crossfeed's Vishay resistors and Panasonic capacitors sizes spec'd per Chu Moy's "High-Z" circuit.

Buffers - Elantec EL2001 (5 total)
Stacked output buffers

Volume Pot. - ALPS 50K

Power Supply:
Two 9V batteries in series (18V)
or
24V wall wart

Enclosure: Hammond 1455N1201BK

 

[MERTON]

how'd you get handles? i want to be able to hang mine from the cieling.. that's how audio should be.. nice and hung... :shock:

:gross: