Solid State Guitar Amp Forum | DIY Guitar Amplifiers
Solid State Amplifiers => The Newcomer's Forum => Topic started by: saturated on September 02, 2023, 01:37:23 PM
wanted to input signal to BB and check it out
seems SG needs to be added in series
so here we go....
randomly chose 1k resistor then connected SG as PS
didnt want to kill my "new" scope so checked with multimeter first
IMG_20230902_115714567.jpg
being cautious was tough to get any kind of output...I started on the low output and cranked it up...got some mv reading finally
connected my scope and couldnt get a triggered signal worth crap
repeated the above on high output
IMG_20230902_122458426.jpg
was still surprised to see small output....idk
but finally got signal on my scope and tried to adjust pp
IMG_20230902_121214214.jpg
then I remembered what G1 said about dc offset so i checked it and it works like he said but wierd if i went to far it got cut off...clipping?
IMG_20230902_121333507.jpg
so that was a lot of fun gonna put this stuff up and contemplate todays events
:o
like why i get the same reading when scope is set to ac or dc...
but i was happy to see the amplitude change when volts per div was changed
as usual thanks for listening
Not sure what you mean about getting same reading on AC or DC. On AC, the waveform is centered around the middle '0' line of the scope. When you apply the DC offset of the generator, the whole waveform shifts upwards, approx. 2 lines on 2V/div setting, so 4 volts. That is AC signal riding on DC offset.
Turn the generator 'amplitude' all the way down. You should just get a flat line on the scope. Adjust the 'DC offset'. On AC coupling the line should not move, on DC it should.