Just wondering what the 2.5 w amp board from cbgitty sounds like when distorted. Ive tried other chipmamps and some distort nicely e.g. LM386, but others do not e.g TDA2003.
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Looks like the psycho along with the amp can drain the battery pretty fast. Admittedly using rechargeable 9v battery which doesn't have much capacity. Might use external 9v power supply instead
robert jones > Fergus LesterFebruary 17, 2020 at 6:59pm
I use the battery pack from an RC car to power mine. Rechargeable, 9.6v, molex connector for easy charging/switch out, and I get about 5 hours of play time at full volume between charges.
Paul Craig > Fergus LesterDecember 9, 2019 at 10:19am
You can use 2 9volt batteries in parallel(both hot wires together and both ground wires together) for longer play time or get a walwart with high miliamp output. Unfortunately, the walwarts may cause problems with unwanted noise.
A lot of these amps come with a block type gain pot on the board to set the gain level. You can remove them and wire in a regular gain pot for accessible control. I think some of the amps come with instructions on how to do that mod if they haven't made them all 2 knob amps(volume and gain) by now.
Fergus Lester > Paul CraigNovember 23, 2019 at 2:31pm
Psycho knob on the way! The cost of this simple little amp is gradually creeping up but then I'm learning a lot in the process. Money spent on education is seldom wasted !
Yes that sounds like what I'm after but am curious to know how it sounds without the psycho knob. In my Marine Band amp I have a TDA2003 amp board which sounds OK clean but not distorted so am considering changing the electronics.
Replies
Thinking if building one into a DIY power amp which needs at least 12v
Ask Ben(Gitty), He'll know.
Listen to Psycho knob 1.m4a by Fergus Lester on #SoundCloud
https://soundcloud.com/fergus-lester-103857150/psycho-knob-1-m4a
I use the battery pack from an RC car to power mine. Rechargeable, 9.6v, molex connector for easy charging/switch out, and I get about 5 hours of play time at full volume between charges.
You can use 2 9volt batteries in parallel(both hot wires together and both ground wires together) for longer play time or get a walwart with high miliamp output. Unfortunately, the walwarts may cause problems with unwanted noise.
A lot of these amps come with a block type gain pot on the board to set the gain level. You can remove them and wire in a regular gain pot for accessible control. I think some of the amps come with instructions on how to do that mod if they haven't made them all 2 knob amps(volume and gain) by now.
Psycho knob on the way! The cost of this simple little amp is gradually creeping up but then I'm learning a lot in the process. Money spent on education is seldom wasted !
Yes that sounds like what I'm after but am curious to know how it sounds without the psycho knob. In my Marine Band amp I have a TDA2003 amp board which sounds OK clean but not distorted so am considering changing the electronics.
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