No transformer reverb with 12AU7

[tubesornothing]

I came across a reverb driver circuit which uses 1/2 a 12AU7 and no transformer.  1k/25uF cathode.  It feeds off the plate of the 12AU7 into 0.22uF coupling cap, then into a tank rated at 1.9k input.  The other interesting thing is that the plate resistor on the 12AU7 is only 10k - I presume that is to help with driving the moderately low impedance tank?  Upping the current?

The recovery is a little strange as well.  1/2 12ax7 with a 470k plate resistor. 3.3k/0.1uF cathode.

The reverb works quite well.

[sluckey]

Sounds similar to some of Magnatone's circuits. Look at page 4 of this pdf...
http://home.comcast.net/~seluckey/magnatone/Magnatone_M10A.pdf

[caps8419]

Sounds similar to some of Magnatone's circuits. Look at page 4 of this pdf...
http://home.comcast.net/~seluckey/magnatone/Magnatone_M10A.pdf

Slucky,

I know this is a very old thread but do you have a new link to this Schematic by chance? looking into a 12DW7 cap coupled reverb as well. Thanks!

[sluckey]

Click on the world icon below my name.

[caps8419]

thank you