Odd Monitor 10 Crossover

Anti_Skate

Hey Polk guys,
New to the forum, thought I would drop by and see if anyone had any input on one of my many audio projects.

I am working on what I believe are original Monitor 10's, but the crossovers do not match the Polk schematics.



On first look they have 2 fuses in the back instead of 1.



The large electrolytic is a 33uf instead of 34uF, and the 12uf electrolytic that is supposed to be across the 2.5ohm resistor is missing.
The circuit board has no foils on the back and is wired point to point.



I haven't verified the inductor values as of yet.

Are these very early Monitor 10's?

I am looking to recap these. They do have the Peerless tweeter with the hole in the middle.
Would it be good to rebuild the crossover to the original schematic, or the modded one, or leave it alone and replace whats there?

Kinda confused.

mhardy6647

Given the two fuses, I think it's an early Monitor Series Model 10A.
My Model 7As (ca. 1977) also have two fuses and cosmetically are analogous to these 10s.

Polkmonitor7Asn4900 by Mark Hardy, on Flickr

The very original Model 10 had an uncoated paper PR and only one fuse.

P1020559 by Mark Hardy, on Flickr

westmassguy

Welcome to the Forum. Definitely an odd duck. I've never seen radial caps used on Monitor Crossovers from that era. Possibly a prototype since it's point to point.
We don't have schematics for the 70s Peerless models.