Cathode Follower Reverb Circuit

[printer2]

Want to tweak some values yet. Not really sure about the NFB, get a loss of highs and I figure that without NFB the higher output impedance of the amp is compensating for the impedance rise of the speaker. I was going to try a T filter instead of the feedback resistor to reduce the treble getting to the second stage. A lot of gain on tap so I could always put a Blackface treble and bass controls. Going to live with it a while before I decide what to do. Lot of other projects waiting for me anyway.

[printer2]

Already thinking of modifying it. Adding a modified 5F4 Super bass control to the Tweed tone control. The NFB was not doing it for me.

[Willabe]

Adding a modified 5F4 Super bass control to the Tweed tone control.

Why?

The NFB was not doing it for me.

Not doing what?

[printer2]

Just curious.

The switch has three positions. Most gain position with the second stage bypassed with a 22uF cap. Middle position with this cap removed. Third position with the first stage fully bypassed with the 22uF cap and NFB to the second stage. The first position sounded fine, the reduction in the bass helped out when cranked up although I feel maybe it might benefit with a still smaller capacitor. The second position had lower gain than the first but the frequency responce was roughly the same. Liked this one also. Third position with NFB just sounded dull. I put that up to the NFB lowering the output impedance and the amp not increasing the power to the treble in response to the rising impedance of the speaker. I thought of replacing the feedback resistor with a T filter, resistor, cap to ground reducing highs, another resistor. Sort of a presence control on full.

Thought what is the point, I like the sound with no NFB so why not go with it. Might get a little tighter bass from the speaker with the T filter, might go down that path some other day. Don't want to spend too much time playing with amps, really should be building some guitars.