Author Topic: Hotcake freq analysis and mods  (Read 1789 times)


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Hotcake freq analysis and mods
« on: July 16, 2012, 01:53:37 PM »
I was inspired by the mentioning of this post by Joe Gore to revisit frequency analysis of circuits

For these tests, I ran 20 secs of pink noise through the "stock" Hotcake circuit (Gain @ 2:00, Presence @ 12:00, Level @ 1:00) to come up with a template

This can be compared to pure pink noise through the bypassed circuit

Together, Match EQ gives the response of the Hotcake circuit

Then, I exchanged the stock 0.047 uF output cap for a larger 0.47 uF cap. Mod compared to Stock

It's interesting to see the change, as it's not immediately noticeable by ear since other pedals and amps usually filter out some of those sub 50 Hz frequencies. I would like to do more tests with more caps and opamps.

Previously I analyzed the SHO, Neutrino, and Sunking using a different but equally accurate method in this thread