Hi All, Last week, just the day I mailed Tony about the shipment of my Lite+XTALL kit I received it. I made some pictures during the build, and some measurements. Posted on http://www.theuno.nl/blog/ (not that fancy).
Now I'm at the part of the opamps, and it looks like that they only get between 2.06v and 2.5v on the V+ pin. In the datasheet I see that the voltage should be between 3v and 12v. And I was expecting to measure something around the 5v after reading the schematic, the LM7805AC gives 5v as output. Now with a closer look at the board, I find that R19 (1k Ohm) is between the feeding point for the opamps, and the 5v line. Then it is logical that I measure the 2.5v (with the Si570 working in the lowest frequency). I think that this might not be enough to really drive the opamps. Is this correct ? Or should these work with just around 2v ? Or should some correction be made, or did I overlook something somewhere ? Hope somebody can help me out. Thanks, Paul PD5PT
