PLAN B analog blog

hello peter,

it's been almost 4 weeks since you sent the posting below.
any news about the vco's?

best wishes

ingo (still waiting patiently)





--- In PLAN_B_analog_blog@yahoogroups.com, Peter Grenader 
<peter@b...> wrote:
> 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