That's cool. I was just hunting for 1.8M on my go-to amp-supply sites -- not so much. So 2M would be handy. EDIT -- but now I see my friendly small supply sites (AES, tubedepot) just carry 1.5M and 2.2M. No, wait, AES has carbon film 1/2W at 2M. Whew. I forget how the math works here... is it just two resistors in series?
That's very helpful; just getting a more linear response would be elegant, and what I've seen in the past suggested Lar-Mar may be the most popular and widely used post-PIMV on several forums I was reading.
The other supplier hassle is Alpha's dual gang pots seem to come most often with their nasty little 0.31 bushing diameter, but it looks like AES has a version with the nicer 3/8 bushing.
Yeah, there's a lot riding on the pot to be of good taper and reasonably accurate value to behave as desired. Alphas are hit or miss, so are these newer yet unknown Chinese manufacturers making 2w Carbon pots - I've used sucessfully though.
Should you have the room, it is totally worth getting a PEC/RV4 spec pot ($40!), but if you do it right, you do it once! The accuracy, taper and robust feel is second to none.