[DSP-10] DC voltages not right

[k7nq-2 at att.net]

Daniel,  230 mills is normal standby current for the DSP-10 on initial light off.  I have built 2 DSP-10's, one with the EZ-lite and one with KDSP dsp units.  Both drew the same current  upon initial turn on.  The 11 volts is fine for the early tests.  The reason for this voltage is because the regulators have probably not been heat sinked to the case yet.  Good job and looks like you are almost home free.  The rig will draw about 600 mills when it is up fully and in transmit.

73  Jimmy  K7NQ  CN87th
 
-------------- Original message from Gene Hightower <gene_q_hightower at yahoo.com>: -------------- 


> I received a new MAR-3 in the mail from Daniel Schultz, so I was able 
> to finish my DSP-10 main board today. 
> 
> Thanks Daniel! 
> 
> I put 11V into the thing and... well, no smoke, anyhow. 
> 
> First thing I noitice is that it's drawing only 230 mA -- so I know I 
> have issues. 
> 
> Checking the DC voltages I find a few problems: 
> 
> U14 pins 2&13 read 5.37 (maybe close enough to 5.5? dunno) 
> U1 and U2 pin 3 are both 0.013V (should be 3.5 and 4.7) 
> R110 reads 1.75V (should be 0.23) 
> U105 pin 3 reads 2.5V (should be 3.5) 
> U106 pin 3 read 4.77 (close enough to 4.6? dunno) 
> R59 reads 1.4V (should be 0.91) 
> U8 pin 3 reads 2.5V (close enough to 2.8? dunno) 
> U9 pin 3 reads 3.2V (close enough to 3.6? dunno) 
> 
> Everything else was spot on. 
> 
> I'm still new to radio and kit building, so I'm sure I've done 
> something silly. I'm going to quit for today and take a look at 
> things with fresh eyes tomorrow. 
> 
> Any and all suggestions are welcome. Thanks! 
> 
> -- Gene 
> 
> 
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