Wednesday, March 28, 2012

I'm slated to commence on a recording project this evening, so it's high time I get around to recapping the Langevin AM-301.

If anyone reading this has a spare couple of those red Rolo looking slider caps, I'm interested.

Another low parts count device, my favorite!

To the right is an upsized 33-50 (was a 25-25) CDE and 4.7-63 Spragues, but they are nigh on identical in appearance to the Nichicon caps in other values I procured. I miss the days of manufacturers celebrating their independence with unique and ugly colors (you know, when they made the stuff themselves..).

I decided to draw the line at recapping 4 (BEAD), retaining a pair of original (CF) and the pair of previously modified (HG, by an unknown tech at an unknown date) for comparative purposes. I've seen pictures of this mixer as a set, with EQ, limiting, etc, and am speculating that the traces that terminate at the end of the PCB can plug into additional modules (of which I sadly have none).

While the picture does not reflect this, I have recapped the master summing cards seen here. I have not yet messed with the 100-50 CDE Beavers, as to do that in a non-half-assed manner will entail actual disassembly (as opposed to actually reaching over and pulling open the flip up panel). I might be a lazy asshole and clip those caps out, loop the existing legs and install the new caps that way, but just typing that out made me cringe so that's probably unlikely. It will probably wait until I dig in to replace the channel 8 slider, unless malfunction forces me to tend to it immediately.

Power is single pole 48 volts DC. Makes it tempting to implement phantom power, though I could probably build up a small phantom power breakout box to piggyback that 6 pin Jones outlet with a lot less hassle and more ease of use. I do like the abbreviated "cue".


matthewjosephpayne said...

I'll dig at work tomorrow - I'm pretty sure I have those sliders. Can you take a closer photo of one?

crochambeau said...

I just wiggled like a giddy school boy. I can take a closer shot this afternoon, they are early 70s Duncan Slideline faders, if that helps. I'll break out the calipers and post the analysis, then, if you do have something we'll discuss treats.

crochambeau said...

Here's a link to a close up photo of the knob please let me know if any are available and how much/trade. Measures roughly 3/4" diameter (tapers a bit to the front) and 1/2" deep.