Re: Click Pix
- According to my scope, the click is present in a big way at the output
of the first audio stage, U3 pin 1. (I'm seeing the same click
everyone else is seeing.)
- Don't have a scope here at work but wonder if you can
see the click at the output of U2 (mixer)?
Here is another thought: Perhaps the mute line is
being coupled to the audio chain somehow due to
--- Dave <dmertz@...> wrote:
> According to my scope, the click is present in a big__________________________________________________
> way at the output
> of the first audio stage, U3 pin 1. (I'm seeing the
> same click
> everyone else is seeing.)
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- Two points:
o The infamous click is present on several "QRP" rigs in a similar
manner. I believe Steve even comments about that somewhere on his
site. My SW-40 hurts my ears with headphones on.
o The click (as described in this train) is NOT present (barely
discernible) in the ATS-3A I built. I would assume therefore that it
is either a 'build up of tolerances' or some of us are just 'lucky'
These comments are not meant to discourage further searching, but to
suggest that a solution may require a 'creative solution' to be
applied at the trouble source. Perhaps one that would be useful in
other QRP rigs as well.
- --- In AT_Sprint@yahoogroups.com, Michael Harnage <w1mt@...> wrote:
>I think I see it on the outputs (pins 4 and 5) of U2 as well, but,of
> Don't have a scope here at work but wonder if you can
> see the click at the output of U2 (mixer)?
course, at a lower level.
There is very little click on 80, 30 and 20M, but it's somewhat
pronounced on 40M (L1F, L2F and C3F have altered values on my 40M
module, but I don't think that's a factor).