Plan B Model 15 photoz
2005-03-26 by Peter Grenader
All, Below please find three links of pictures taken about a half hour ago of what I'm up to today...and every day for the next five weeks. The following fotos show three PLAN B's in the various test stages - there are four, to wit: The first test is done with only the VCO's core components installed. This is the PCB on the right with the scope probe coming off it.. This test verifies that the cores are operational and gives me an opp to adjust the triangle symmetry if required while everything is easy to get to. The second test is of the completed board with the main waveshapers and VC inputs installed. This is the partially assembled unit on the left of the picture. At this test I verify that the sine and saw waveshapers are operational and that the VC input ranges are correct . I also adjust the 1v/oct scaling at this point. IF noise is going to pop up, the addition of these components is what's going to do it so again, I test for this before everything is slapped together. The third test is of the completed unit - this is the unit shown in the center in these pictures. At this test I just run through all of the operations with a scope and....my ears. This particular unit in the photo is set to ship to Eric as soon as test 4 is complete Test 4 is a 48 hour burn in in which the unit runs in an enclosure under it's own heat . An example of this is shown in picture 3 (!) . Actually, I've got none in B/I at the moment. Some of the expo boards are potted before this test (it depends on which tempco configuration I've used - there are three). The expo boards can be seen in these photos as the little plug in boardlette that sits on top of main PCBA in the back - he ones with the round metal can transistors on them, either a the Linear Systems LS318 or LS312, again depending on the application requirements of the customer. Here ya go: http://www.buzzclick-music.com/testpic1.JPG http://www.buzzclick-music.com/testpic2.JPG http://www.buzzclick-music.com/testpic3.jpg OK OK OK , foto three is a joke - but everyone's been at wits end lately, i thought it might help. I am basically running an assembly line for the next 5 weeks getting these units completed. With any luck, all 40 that remain will be shipped within 4 weeks time. That is a challenging estimate, but achievable if I keep my nose to the grindstone. If you've sent a request of status -- there it is! Sorry for the crossposting best, - Peter Grenader more info on the plan B is here: http://www.buzzclick-music.com/model_15.html