META42 Blue Portable pix
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KurtW

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carlo, I got the idea from Tangent's website about using IC sockets for some of the resistors instead of soldering them in. The resistors that set the gain of the amp are in these sockets, so if you changed headphones or for whatever other reason wanted to change the gain of the amp it could be done easily. The LED resistor uses two single pin sockets. The ICs are also in sockets, so changing ICs is also pretty easy. I bet it's theoretically better if you didn't use any sockets for anything and soldered everything in, but I doubt the difference is very audible. The sockets have gold plated contacts which should help long term.
 
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post-195983
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eric343

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Nice!


So KurtW is our newest (I guess) DIYFSE-er... welcome to the fold
 
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post-195984
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eric343

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By the way - why's there a TO-220 device in there? Crowbar diode?

And what volume control? Panasonic?
 
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neil

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Wow, that's almost as good quality as the picture of my META42 Blue.
 
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post-196042
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JMT

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Quote:

Posted by Neil:

Wow, that's almost as good quality as the picture of my META42 Blue.


Hmmm, lessee

Neil's pic:



MacDEF's pic:



 
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post-196051
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carlo

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kurt,
thanks a bunch
 
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post-196065
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KurtW

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Good eyes Eric...yes that's a high current crowbar diode to protect against a reversed battery. The board had room for it so I put it in. The volume control is the Panasonic one.
 
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N@Z

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MacDEF:

Cool amp! How's about some pics of the innards.. for us fetishes


Nearly got JMT to build me something similar but with an external battery pack but thought against it & decided to get a maxed out META instead. Can't wait!
 
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HappymaN

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Quote:

Originally posted by JMT
Hmmm, lessee

Neil's pic:



MacDEF's pic:





Ooohhh... The claws are out...


All these pictures of META42's are making me want to send JMT a PM and get one myself, but my rather gaunt looking wallet is just saying no...
 
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x1lexure

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Same here happyman... I wish I had the cash to buy.


Looks are important to me. I'm one of those people that believe looks affect how much you like something. I believe that if it doesn't look good but sounds good you'll never be truly satisfied. Sound is the most important thing of course but looks come in second or possibly third behind useability..
 
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MadDog5145

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BTW What is the battery life on this amp?
 
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post-197083
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KurtW

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It draws 12.2mA at idle with a 9v Plainview recharable battery putting out 10.0 volts which is typical. The battery is rated at 170mAH. With music playing on low impedance phones the current goes up to around 13.6mA, giving 12.5 hours battery life. Obviously this will vary with different headphones and how loud you play it, but that should give you some idea.
 
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post-197195
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tangent

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Quote:

nice travel rig there


Yes, the Headroom Airbag works really well with the Serpac H-65 enclosure. I used a similar system myself for awhile, but then I got a PJB-100 for my portable system. And, yes, I have the Headroom bag for it, too. I highly recommend those bags -- great stuff.

Quote:

Do they make a smoke color?


Yes. Also green, red and (of course) blue.

Quote:

there seems to be a following for two 9v batteries.


Depends on the op-amp and headphones you use. If you use an OPA627 and Senn HD-580s, one 9V just in't gonna cut it.
 
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purk

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McDeff,
Where's the review?? Thanks.
 
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Voodoochile

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Nice looking work there, KurtW!
 
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