OT: Accu-tank drive/receive hi-p opamp circuit pair help?

[zeppenwolf]

"What we have here is an OT issue to communicate."

The issue is a web-borne op-amp circuit pair for driving/receiving from the usual Accutronics tank(s).  The author of these claims they will substantially improve the noise performance over what is commonly found, and I have to say I believe him.  I can't say for sure about other makes, but for Fender at least, I don't think you will dispute that the noise performance of the stock circuits is just ghastly.  Well, I've got a Fender.  And this author seems to know his way around an equation.  So I've got high hopes, but..

This is OT, ya can't step on it, but I'm hoping some here might be interested to help me realize these circuits.  Maybe I should say "us" rather than "me": I don't understand why I seem to be the first person asking about this, but so be it.  I asked for help on a forum which the author himself suggests on his site, but it's been a few weeks and nobody has been both willing and able, so... here I am, where I know the Lords Of The Opamp hang...

The problem is that the circuits are listed for a particular tank, (or two), with specific values to match the specific impedances of those tanks; I have a different tank.  He says, "the concepts here can be applied to other tanks"- in typical EE guru style, he fails to notice that if I knew everything he does I wouldn't need his site in the first place.

The initial note is here:

http://members.tripod.com/~roymal/reverb.htm

Then at a later date the receiver was improved, and that circuit is here:

http://members.tripod.com/~roymal/ultimate.htm

The send circuit values are given for an 8BB tank w/ a 190 ohm input impedance; I have a 150 ohm impedance.  The receive circuit values are given for an 8*B with a 2k575 output impedance; I have a 2k250 output impedance.

Yes, that seems "close enough for rock", but it would be nice to get it "right", given the critical demands on the circuit, and I also have a few other piddley problems and sanity-checking to ask, but I wanted to ask the very basic question first, given it's OT nature:

Can someone help me adjust these circuits to the impedances of my 4BB series tank?  Thanks,

Eden

Edit: the ohm symbol turns into a "?" here...