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Cmoy as pre-amp? - Page 2

post #16 of 23
1/18/11 at 10:55am


SPST, On-On Switch

 

It is pretty common to have the on/off switch built into the volume control.

What volume control did you order?

 

 

Quote:
Originally Posted by Somebody007 View Post

Sorry to trouble you again. but could you link me a power switch from rs components? I've tried to find one myself, but I seriously don't understand a damn thing of it.What does an on-on switch config mean? ANd what about contact rating or contact resistance?(you don't really have to answer the questions I'm just making clear that I don't get it ^^)

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post #17 of 23
1/18/11 at 10:56am

Yes
 

Quote:
Originally Posted by Somebody007 View Post

also what would be a good A and V rating for a power supply if I intend to use one? I have 12Vdc and 1A power supply lying around would that be adequate?

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post #18 of 23
1/18/11 at 11:03am

Volume control without power switch

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post #19 of 23
1/18/11 at 11:21pm
Thread Starter 

Currently I have this volume control as reccomend by tangent http://be02.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=2499159 I would really prefer one with a build in power switch, but I couldn't find one. How are those volume controls called?

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post #20 of 23
1/19/11 at 12:03am

http://www.alps.com/WebObjects/catalog.woa/E/HTML/Potentiometer/RotaryPotentiometers/RK097/RK0971221Z05.html

 

they are available in Tangent's shop

 

cheers

FRED

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post #21 of 23
1/20/11 at 1:18pm
Thread Starter 

thanks a lot guys you were an amazing help

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post #22 of 23
5/24/11 at 8:35am
Thread Starter 

An Update:

 

I built the first of the 2 CMOYs and it works which I am very happy about. I have not doen any extensive testing but so far from the 1 song I compared there is a more than just noticable improvement over my yamaha stereo amp. A fairly amazing feat considering it looks like I fished it out of a garbage truck and I'm using the "mediocre" op-amp and the "mediocre" caps I suggested myself but was advised not to buy. I did however buy them because I needed cheap caps to build my first test cmoy with. In conclusion I'm very happy with the result and would like to thank all who contributed.

 

Just another question the TLE2142 does not work when I connect sound to the amp with it it gives a short burst of the music(distorted) and cuts out. Why is this and how can I prevent it from happening in the second build?


Edited by Somebody007 - 5/24/11 at 11:15am
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post #23 of 23
5/24/11 at 1:33pm

Unless Im reading the datasheets wrong you have gone from one fast and cranky opamp to a different fast and cranky opamp. 


 

Quote:
Originally Posted by Avro_Arrow View Post

The LM6172IN is a fast Bi-Polar op amp and you might

find it hard to use for a first time build. Try and stick with

JFET input op amps for now, Bi-Polar input op amps

are trickier to use. You could add OPA2227, OPA1642

and AD8620 to your list to try as well. 

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