Wendigo preamp completed + advice request

[fossilshark]

Hi all, with much credit going to you lovely people here on EL34world I finished the "Wendigo" preamp. It is the Ceriatone Chupacabra circuit turned into a rack mount preamp. This thing sounds absolutely killer and the options all the different settings give are endless.

As expected for a high gain preamp this boy is quite noisy at max gain. So I plan on adding a bunch of shielded cable to the controls (and the long yellow wire going to the output), the potentiometer near the transformer is going to be replaced with a fixed resistor, and I will add the resistor divider humdinger circuit to the heater line as previously recommended.

I was just wondering if anyone has any advice for my layout? The blue and black twisted pair is the heater wires and I am worried they are much too close to the output jack, maybe I should use shielded wire for the heaters?

Again I appreciate all who helped me get the circuit made up, and I appreciate any input on what I could change to make this layout better.

[kagliostro]

OMG 

 

 

 

Have you a layout you can share ?

THANKS

Franco

[ShoemanGB]

Fantastic job! 

[DummyLoad]

Just a suggestion - See attached.

Respectfully,

--Pete

[fossilshark]

Fantastic job! 

OMG 

 

 

 

Have you a layout you can share ?

THANKS

Franco

Haha thanks guys! I really wanted this one to be perfect. I will post all my documentation with some sound clips after I evict the noise gremlin.

Just a suggestion - See attached.

Respectfully,

--Pete

I was thinking this originally but I guess I was thinking too hard, the negative terminal of the caps should shield them right?

Used some PTO so I can stay home and work on this all day I will implement some tweaks and keep yall updated.

[DummyLoad]

The negative ends of the caps are at ground potential. Not shielding per-se but not as susceptible to eddy currents produced by heater conductors.


With as much gain as you built, DC heaters would likely have been of benefit to this plan.


Respectfully,



--Pete

[fossilshark]

Just a suggestion - See attached.

Respectfully,

--Pete

Even without shielding that long output wire this seems to have worked well, thanks dummyload. I threw in the humdinger and switched the janky pot for a fixed resistor and its already leagues better. With the volume on max you can almost hear a 60/120hz but it really is negligible.

I am just chasing a very small amount of static noise from the input section now. Nothing a bit of shielded cable can't take care of I think.

[tdvt]

Really beautiful job!

[fossilshark]

Really beautiful job!

Thank you! I am not entirely happy with it mostly due to aesthetics but hey gotta know when to put the soldering iron down amiright?