Gibson pre-war blade (CC or OM) pickup dimensions from top of guitar?

murrayatuptowngaller

Hello:

I picked up a 1936 Charlie Christian or Oscar Moore, or PU-150 Pickup Unit adapted to a round hole guitar by (apparently) a DIY machinist. I bought it from someone who bought it from a store, and couldn't use it, so nobody really knows the full history.

I figured out it didn't have enough of the proper hardware for archtop use. I had never seen one in person, so it was simply huge. I figured out I owned no guitars with suitable bracing & decided it had to move on, but it wasn't physically usable.

I sent it to Lollar because they had drawings of vintage ones, and it was identified as being of a lapsteel/Hawaiian origin, probably EH-150, a 6-string version

I had them provide me the missing bottom plate with 4 magnet screws and 4 springs/screws that go through the lapsteel body into the large baseplate. They told me it is ever larger and more massive than the archtop version, and that even if I had an archtop with suitable bracing, the extra mass and length are probably not a good idea for body vibration. Magnets are about 4.5" long, 1.25" wide and about 3/8" thick.

I think it's actually from an EH100 because all the EH150 photos I find online have 3+1 notched pole/blade, and the EH100 images, being a little earlier, have the solid blade.

I am hoping someone who has either a pre-war Gibson ES, or any modern aftermarket CC pickup that is likely a reasonable physical replica, could measure an archtop the width (point-to-point) of the top of the bobbin, and the width of the pole/blade.

This way I can tell the next owner, with confidence, whether it really IS wider than an archtop CC pickup. Who knows? It might be suitable for a 18" or 19" beast or a 7-stringer (really going out on a limb).

I have a few numbers memorized from mine but MIGHT have to retrieve what I posted inquiring elsewhere.

The pole blade is about 2.5" wide (63.5 mm) and 0.097" (2.5 MM) thick.

The hex-shaped bobbin is 3.73" (94.8 mm) wide, point-to-point, and the 'height' I might not have memorized. a little over 1-1/8" (29.4 mm) tall IIRC.

Oh, I have photos. The caliper width looks small compared to the bobbin height because the caliper is on the table after the measurement, about 1-3/4" (44.5 mm) lower than the bobbin.

Lollar confirmed the winding is original & intact & the magnets were weak, as expected. They recharged them, and told me the pre- and post-Gauss reading.

Thanks for reading