Monster A47 variant

[jtfoo 0]

Agree here with Firefox, for audio, you gotta use a log pot. It's the way our ear detect loudness, that a log pot would give reasonable increment with every turn.

 

But $50 for the pot for your project, imho, is overkill. Try law faking your existing pot(i.e parallel a resistor from wiper to ground). Try a 2.2K resistor for a 10K pot or 22K for 100K pot. Though not perfect log imcremental, but good enough for me.

[Firefox 0]

IIRC, it's 15% of linear pot value.

[tropicalrips 0]

i hav a 50k pot what resistor value should i use? 8.8k ?

 

 

[tropicalrips 0]

That's still fairly low impedance. 2x gain is still enough if your portable throws out 1.6v RMS from the line-out.

i hav tried low gain before on a Cmoy, it got very disstorted when tried it with my HD570 (130ohm)

 

with the porta pro and low gain , it sounds like no amp , hav to increase the volume on mp3 player by about 40%

 

still trying to find a balance here

[jtfoo 0]

IIRC, it's 15% of linear pot value.

I've used 2.2K for 10K pots and the incremental is alright.. I took my reference from Rod Elliot's article when I was doing my project. http://sound.westhost.com/pots.htm#chg-law

 

But 15% I guess would still be alright..

Edited December 31, 2003 by jtfoo

[tropicalrips 0]

didn't hav the exect values, so tried it with a 10k resistor on 50k pot, it improved the increment a little, but caused disstortion to the music

[jtfoo 0]

Law faking shouldn't cause distortion at all. Might be something else.

Edited January 1, 2004 by jtfoo

[tropicalrips 0]

Law faking shouldn't cause distortion at all. Might be something else.

could it be my gain level? it was 6 when i tried law faking on the test Cmoy

[tropicalrips 0]

the "Pot-Racer" monster A47 variant has been cased

the Altoids tins were more difficult to find then the components

 

can also see my new mini Hammond case really cute, its even smaller then the Altoids

Edited January 3, 2004 by tropicalrips

[tropicalrips 0]

i hav made some minor changes to the amp

can see the "turbo couplers" beside the power caps?

Edited January 3, 2004 by tropicalrips

[garc 0]

hoi! stop teasing already when can I buy 1 of your amps

[garc 0]

Bought the Altoids amp from tropicalrips, happy with my purchase thanks Tropicalrips You guys should check out his mini hammond amp very cool

Edited January 5, 2004 by garc

[tropicalrips 0]

made another A47 variant its the baby brother of the Monster bought by Garc

hopfully this amp will make it to the meet before someone else buys it

Edited January 7, 2004 by tropicalrips