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Messages - flester

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106
The Newcomer's Forum / Re: Velleman Kit 4001
« on: May 27, 2016, 06:09:41 AM »
Any suggestions for preamp design?

107
The Newcomer's Forum / Re: Velleman Kit 4001
« on: May 26, 2016, 06:19:59 PM »
Mackayprod, thats cool. Are you using the Velleman kit, or just the TDA2003 chip which is at the heart of it? I got kit from Maplins (the UK/Ireland equivalent of Radio Shack)

Been playing with it again and decided I like it (or am too lazy to modify). basically I play it quiet or else flat out (wakes the family if not the neighbours) and theres no in-between. One mod I heard of is to use a smaller resistor going in to the inverting input. this increases negative feedback thus reducing the gain. I based the enclosure design on the Pignose (imitation, flattery and all that) though its a bit smaller. I put a bit of effort to fit a DC input jack and also a headphone out jack, so I can always change the guts while keeping the enclosure (of which I'm quite proud). Mainly used with my homemade Lap Steel and a Hofner Shorty guitar. Actually sounds great as a Harmonica amp too.


Letting the battery run down gives more distortion anyway (sometimes in a good way...) as Brian May did with his Deacy amp. You can now buy a Deacy replica including a variable power supply to simulate a dying battery but wheres the fun in that?

108
The Newcomer's Forum / Re: Velleman Kit 4001
« on: May 25, 2016, 05:44:50 AM »
Think iIl just accept that i can have quiet and clean or loud and dirty.  For quiet and dirty i can use my overdrive pedal. Will be back for more ideas on my next build-possibly something tiny with a 2" speaker just for fun.

109
The Newcomer's Forum / Re: Velleman Kit 4001
« on: May 24, 2016, 04:31:21 AM »
Thanks for that. It can take up to 18 v so will look for a new supply ti deliver that. Or 12 AA batteries. Would a 4 ohm speaker help?

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