--- In
Homebrew_PCBs@yahoogroups.com, "daemons_ca" <daemons_ca@...> wrote:
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>
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> James,
>
> I got the TL901 after all. Opened it up today and I see what you mean about the SMT resistors.
> So which pin did you use on the connector? From what I can tell, white is return(common), black is 3mil, and brown 5mil.
> Black goes to 6K8, and Brown to 3K3. So I'm guessing the lower the resistance the hotter?
> I'll want to use a 5K multi-turn trimmer if that's the case.
>
> The lowest resistor on the PCB is a 1K5. What temperature did you get using that? Did you disconnect the other switch? If not, what position did you put it in?
>
> Marc
It's been a while since I've had it open so I forget some of the details but the pins were labeled on the silkscreen and the one I used was "HH" which I believe was 1.5K.
I installed a SPDT toggle switch to select between the original thickness switch and the HH pin. Any number of other methods would work just as well though.