BA-31A attenuation mod?

[ihscoutlvr74]

Gents,

I finished a pair of BA-31A clones and was curious if an attenuation tweak PRR detailed for the BA-31C's would work similarly in the 31A. 

PRR said in 2008 on a breakdown of the 31C -

"Change R7 to 2K. Change R4 to 100R. Strap a 0-2K rheostat (2.5K reverse-audio pot) across terminals 46. This gives almost 20dB range of gain, both up and down from the stock gain. Keep pot-leads short. twisted, not shielded."

Here's where he's referencing on the 31C at '46':

and Here's the similar 31A area at '40':

Using a different value pot an resistors, would this work??  Many thanks to EMRR and PRR for their knowledge they have shared.

Thanks, Nathan

 

[ihscoutlvr74]

PRR, EMRR, anyone?  thanks

 

[emrr]

the drawings are made differently, which is at first confusing.  I believe you apply PRR's concept across R5 of the BA-31A, which your cropped drawing does not show.  The feedback methods are different in the two amps in the first place; the B/C versions vary shunt to ground, the A version parallels sections to increase feedback quantity.