30-06-2012, 11:22 AM
Hi Rob T, there is no fault as such, what I am after is the typical P to P value of the osc waveform as presented to the grid of the mixer in a standard valve receiver tuned to the low end of the MW band, it's to do with a 1Mhz osc project I am working on to drive a mixer so if someone was to measure the typical P to P value at the low end of the MW band then that would be close enough for me to get an idea, I have no 'scope and checking the mixer -ve grid volts on this project with my cheapo DMM is leading me a bit of a dance, I am getting a reading of -ve 11 volts but I am also getting some other effects while the DMM is conected to the mixer grid which might or might not be masking the true -ve voltage that that meter is trying to measure, it should be a large waveform ie: several volts P to P ie: if it is typically say 25 volts then I can assume that my DMM is more or less measuring correctly, allowing for capacitive loading etc.
Lawrence.
Lawrence.
