RS IIIa Crossovers?

[mwc951]

I've read many, many threads here regarding RS III a & b crossovers and speaker rebuilds.
I decided recently to recap the crossovers in my RSIIIa's.
These are early models with an exposed fuse & screw type binding posts.
My question...these don't look like the pics I've seen here.
Can anyone with experience tell me if these crossovers appear to have been recapped previously?

 

[goodolpg]

You may or may not have seen this..
http://www.infinity-classics.de/technik/manuals/RS_IIIA_technical_sheet.pdf

Do not be surprised if your cap values don't match the "official" schematic.

That silver cap looks period correct, as do the blue caps. Even those yellow thingies look period correct.

 

[mwc951]

Yes, I've seen that schematic.
Should I replace to the spec of the tech sheet or to what I've physically got in the crossovers?

 

[goodolpg]

JMO--your crossover looks original so I'd replace using the cap values currently in them.

Hopefully someone will point it out if I'm wrong.
I'd wait a couple days to see if anyone else chimes in with experience with that model.

 

[geoff727]

Use this one:
http://911manuals.com/preview/Infinity/RS_IIIA.png

The infinity-classics one is for a -IIIb.
The only differences from this schematic on your crossover is probably the fuse instead of the 1A-30 breakers in the midrange and tweeter circuits, and the diodes across the tweeter. The fuse/orange-lettered binding post board/removable crossover from the back, is earlier in the model lineup.

G~

 

[Bkphoto]

wow, thats completely different from mine....

 

[Seppo]

My Xover is also very different looking. See attached photo. Mine are RS-IIIa w/o the fuses outside.

 

[geoff727]

Early models of RS-IIIa:
-Crossover removable from the back
-Tweeter is fuse protected
-Binding post plate is orange lettered with 'real' binding posts

Later models of RS-IIIa:
-Crossover cemented to the inside. More of a pain to work on.
-Tweeter/mid are breaker protected, not fuse
-Binding post plate is white lettered with spring clips
-Diodes across the tweeter terminals

....and maybe some minor variations in between (different coils, different caps used here and there, etc.).

 

[halo71]

mwc, I have the early IIIa's like you do. Your crossover looks pretty much like mine. It does look like someone may have partially started redoing yours.

The blue caps (for woofers I think) look replaced. Everything looks original. Listen to Geoff727. IME, he is 'tha man' on these speakers. He helped me out immensely when I rebuilt mine a few years back. He even messaged me links to all the parts I needed to order!

The difference afterwards was night and day! One of the caps in mine had even came apart exposing the foil and paper inside! My IIIa's have been my daily drivers every since.

 

[mwc951]

Halo71...
I saw the before & after pics of your crossovers in a thread here.
I appreciate everyone's help with this.