Re: DIY Amplifier.
Posted:
Sun Nov 15, 2009 6:41 pmby ecca
The voltage supply on the diagram as per Amarandadadadadada is 15-0-15 DC.
Yours appears to be single ended.
Is it the same circuit ?
Re: DIY Amplifier.
Posted:
Sun Nov 15, 2009 8:57 pmby Amanda
Hi Ecca,
No it's not, it's a maplin amplifier board.
David,
There's no information on specs for the preamp board
but I would expect it to be a fairly low input impedance
say, 10 - 50k ohm, which will damp the guitar output.
Amanda
Re: DIY Amplifier.
Posted:
Tue Nov 17, 2009 9:37 amby RogerCook
Hi David
Velleman market a guitra preamp kit, details here
http://www.velleman.eu/downloads/0/illu ... 2_rev1.pdfI've no personal; experience of it so don't know if it's any good or would work for your purposes but it may be worth a try.
Roger
Re: DIY Amplifier.
Posted:
Sat Nov 21, 2009 12:37 amby davidturner
RogerCook wrote:Hi David
As it's a stereo preamp you might try having the channels in series - ie connnect the guitar into say the left input, then connect the left output to the right input, then right output to power amp. I think I installed one of these preamps on my record turntable. I'll have a look and see if I can find the circuit diagram and see if that's sheds any more light
Roger
Thanks for that suggestion. It makes very good sense. But unfortunately it didnt make any difference appart from the sound. The only difference I noticed is there is now a sound that can only be described as wind blowing around a microphone. (at a low volume) AAAAAAAHHHHHHHHH!!!!!! Its driving me crazy!
Re: DIY Amplifier.
Posted:
Sat Nov 21, 2009 10:10 amby RogerCook
Hallo David
Not sure what to suggest. Can you post a couple of pics - topside and underside?
Roger