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Title: wierd AMZ booster problem
Post by: arielfx on April 08, 2004, 11:42:50 AM

i thought to build this one on a real board after it came out great on breadboard.
i don't know why but when i turn it on there's a volume drop and it seems that the pot. is not doing too much of a difference in controling the output.
i double checked everything and all seems to be ok. anyone got an idea what is wrong over here?

Title: wierd AMZ booster problem
Post by: nooneknows on April 08, 2004, 03:52:14 PM

are you talking about amz MiniBooster? what type of Fet are you using? did you modify any value?
I've built 3 of them for me and friends and they all worked from the very beginning, except once when I used BF245B fet (no problem at all with J201 and 2n5457)

Title: wierd AMZ booster problem
Post by: arielfx on April 08, 2004, 07:54:04 PM

i am building the amz mosfet booster with a bs170. i used the values from GGG because they seem to give the right voltage.

Title: wierd AMZ booster problem
Post by: jimbob on April 27, 2004, 02:17:35 AM

same exact problm here--did u get it figured out?

Title: wierd AMZ booster problem
Post by: AL on April 27, 2004, 08:29:33 AM

Are you playing with the value of R2 as suggested? Mine was doing exactly what you are describing until I got the correct voltage at point A by tweaking R2. I used a 100k pot to get in working and then measured the R of the pot. Once I did that it sounded fantastic.

AL

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DIY Stompboxes => Building your own stompbox => Topic started by: arielfx on April 08, 2004, 11:42:50 AM