Originally posted by sukri01
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Whites Surf PI schematic
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hi
http://www.geotech1.com/forums/attac...8&d=1389296508
Can I use other transistors instead BC337 and BC 556 ?
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Originally posted by bernte_one View Posthello paku
well done
mix clear laquer or paint (acrylic or epoxi base) with graphit powder and use this as shield
if you dont want to by clear paint
use acetone mix this with styrofoam ( search Q-dope) and add graghit powder (you can measure resistor with meter around 200K setting)
Best Regards, Paku
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No problem, seek a transformer like the one in the picture, and measure windings resistance. The winding with lower resistance goes to the speaker, and the other one is connected to your machine instead of a speaker. In effect you get a speaker of a larger impedance, and because it is driven with current, it will be louder.
Alternatively you can seek a 50ohm loudspeaker and use it without a transformer.Attached Files
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