This boils down to: Is the schematic correct? If not, then what's right?
Thanks,
Richard
Thanks,
Richard
On 1/1/13 3:24 PM, Richard Brewster wrote:
> http://www.cgs.synth.net/modules/cgs113_vcm.html
>
> The third wave multiplier has one section where pin 8 of an LM3900 has a
> 220K resistor coming from the input buffer. It is shown on the
> schematic as having a feedback resistor to pin 9 of 1M, and an 820K to
> minus V. I am confused about the values of those two resistors. The
> board labels both as 1M. And the pictorial of the board shows in 820K
> in RED as the feedback resistor. So the RED correction on the pictorial
> is reverse of the schematic. So, which position gets the 820K and which
> the 1M?
>
> Thanks,
>
> Richard Brewster
> http://pugix.com
>
>