[arw45]

Hello,
I'm considering a portable amp for my Beyer DT770 80ohm.  From reading here, it sounds like a cmoy is just the ticket for my first amp.  Using the tangent parts list, the most basic cost is edging dangerously close to $30 from digikey and over 25 from mouser.  I'd like to solder my own amp: how can I get parts for under $20?.
 
I might be able to get my hands on an old pc or something similar to steal parts from--is this worth the effort?  I'm not even on the 'starving student' budget.  Any help? 

 

[Fred_fred2004]

Where are you? what country
 
cheers
FRED

 

[arw45]

I'm in Arizona.  I was looking at my costs, and it seems that most of the outlay is going into the switches, sockets, and various accessories.  Does anyone have any suggestions on where I may be able to scavenge these parts?  I'm willing to shell out the 6 bucks for a decent op amp, but don't care about the nobs and such. 

 

[buffalowings]

Quote:

Hello,
I'm considering a portable amp for my Beyer DT770 80ohm.  From reading here, it sounds like a cmoy is just the ticket for my first amp.  Using the tangent parts list, the most basic cost is edging dangerously close to $30 from digikey and over 25 from mouser.  I'd like to solder my own amp: how can I get parts for under $20?.
 
I might be able to get my hands on an old pc or something similar to steal parts from--is this worth the effort?  I'm not even on the 'starving student' budget.  Any help? 

 
a desktop amp might suit the DT770's a bit better, even the 32ohm model is power hungry, though if you really are on a budget,a  cmoy is better than nothing

 

[arw45]

I would definitely enjoy a desktop model, but those are out of my budget.  I will probably be using this with an ipod, so mobility is a big +.  I am also considering this project as a good way to get some soldering experience. 

 

[Avro_Arrow]

How about a Szekeres?
 
Quote:

Quote:

Hello,
I'm considering a portable amp for my Beyer DT770 80ohm.  From reading here, it sounds like a cmoy is just the ticket for my first amp.  Using the tangent parts list, the most basic cost is edging dangerously close to $30 from digikey and over 25 from mouser.  I'd like to solder my own amp: how can I get parts for under $20?.
 
I might be able to get my hands on an old pc or something similar to steal parts from--is this worth the effort?  I'm not even on the 'starving student' budget.  Any help? 

 
a desktop amp might suit the DT770's a bit better, even the 32ohm model is power hungry, though if you really are on a budget,a  cmoy is better than nothing

 

[arw45]

Reading up on the Szekeres : but apparently parts are about $50... I'm trying to stick to a $20 budget.

 

[nikongod]

The $20 budget is pretty tight for a Cmoy. mega-congratulations if you can pull it off. 
I have considered running a $75 amplifier challenge at NYC/NJ area meets. "what can you build for $75" and we all compare.
 
On that note, if you are using DIY as a way to save money it really isnt*. DIY audio is mostly a way to find a personal reward in building stuff for yourself, and on occasion you get to hear things that may not be commercially available.
 
*At silly price points (~$400? and up) DIY starts to pay off. Until you consider what you would make flipping burgers instead of building DIY audio gear. Its still not about saving money when you sink a lot into it.

 

[Avro_Arrow]

Nikongod, that sounds like fun...I would enter that.
 
Quote:

The $20 budget is pretty tight for a Cmoy. mega-congratulations if you can pull it off. 
I have considered running a $75 amplifier challenge at NYC/NJ area meets. "what can you build for $75" and we all compare.
 
On that note, if you are using DIY as a way to save money it really isnt*. DIY audio is mostly a way to find a personal reward in building stuff for yourself, and on occasion you get to hear things that may not be commercially available.
 
*At silly price points (~$400? and up) DIY starts to pay off. Until you consider what you would make flipping burgers instead of building DIY audio gear. Its still not about saving money when you sink a lot into it.

 

[beachgeek]

Was looking at cmoy kits this weekend and saw this kit on sale for around $15.
http://www.electricsumo.com/shop/new-banzai-v2-cmoy-hi-fi-audiophile-headphone-amplifier-kit/ 

 

[holland]

Quote:

Originally Posted by nikongod /img/forum/go_quote.gif
 
On that note, if you are using DIY as a way to save money it really isnt*. DIY audio is mostly a way to find a personal reward in building stuff for yourself, and on occasion you get to hear things that may not be commercially available.
 
*At silly price points (~$400? and up) DIY starts to pay off. Until you consider what you would make flipping burgers instead of building DIY audio gear. Its still not about saving money when you sink a lot into it.

QFT.  And so it is written...

 

[livewire]

That's totally kewl geek! Thanks for the link.
I picked one up for S&G's for when I'm done with my current DIY project.
Always wanted to build one of these. 

 

[beachgeek]

Me too!  I cannot wait until it gets here.

 

[beachgeek]

The only thing that may be worrisome is the ground between the two 9V batteries.  I am not sure if this circuit can compensate for the batteries being at different voltages (i.e. one battery draining faster than the other).

 

[beachgeek]

 Here is the Schematic