Comments on: Swiss Mix

By: Thomas

Thomas — Tue, 30 May 2023 07:43:16 +0000

I am curious about the sound of this mixer, have you tried it ?
Also curious to have a look at the schematics as I might be on the hunt for one, to make some minimal location recordings with my Nagra III
Cheers & thanks
Thomas (France)

By: Michael

Michael — Tue, 23 Aug 2022 09:31:33 +0000

Hey guys,

I have the schematic of the BM2 here.
Give me a shout if you need it.

Cheers

Michael

By: alvin (lee) challen

alvin (lee) challen — Sat, 20 Apr 2013 00:31:20 +0000

hi, you need
3 wires from bm11 to nagra 111
2/=earth and one plug case= positive +12volts (nagra battery earth)
3/=line out to nagra line in via ”line input” pot on nagra
6/= – 10.5 volts supply for auxilliaries from nagra to the bm11
THAT IS ALL!!!!!
============
To test if any electrolytics have ”gone”
no power and test with ommeter on lowest range
should pulse either way round on momentary connection(look at connections on electrolytivc AND ohmmeter at same time!)

OTHERWISE
Should be 9 to 11 volts across each
if zero on a little voltage then
Change the electrolytic !
good luck
Alvin

By: Matth Jenks

Matth Jenks — Mon, 11 Feb 2013 00:33:30 +0000

The translucent blue electrolytics are from BC components, now owned by Vishay. They still make them with the same shell, and in some of the oddball capacitance values and voltages. (For example 400uF rather than the more common 470uF.)

By: chris

chris — Wed, 12 Sep 2012 10:33:15 +0000

In reply to Keith Kelley. Thanks Keith. Yes I tried to run mine, and I got nada. Nothing. No sound whatsoever. I am certain I was supplying the power correctly. I have found that those 1960's blue electrolytics tend to fail. but my lord so many to replace! Service data with test voltage points would speed up servicing. Any idea where I can find this? c.

By: Keith Kelley

Keith Kelley — Wed, 12 Sep 2012 09:53:43 +0000

I have one of those. They are ok sounding. Just ok. Discrete germanium amp stages, hence the -10/0v power supply connection on the out jack. It fed from the Nagra unit. Make sure you are feeding it -10v to the proper pin, and try recapping the electrolytics. They are all shot, I’m sure. Not sure what the hype is over germanium technology. It sounds kind of abrasive and inconsistent, and eventually start to leak and cause ridiculous problems with feedback loops, etc. I would bet that all of the old Monty Python location recordings (Life of Brian, Holy Grail) had these rigs. Whether the original recordings were ADR or not I have no idea.

By: Fergus

Fergus — Fri, 03 Aug 2012 16:14:17 +0000

Can I just ask, does this take batteries?

By: Fergus

Fergus — Sat, 21 Jul 2012 23:13:40 +0000

ok. thanks.

By: chris

chris — Sat, 21 Jul 2012 02:54:57 +0000

In reply to Fergus.

I have not been able to get it working yet… made a power supply and nothing doin. which is why I hadn’t posted a follow-up… if i ever do get it runnin, y’all will hear ’bout it…

By: Fergus

Fergus — Fri, 20 Jul 2012 22:29:19 +0000

Hiya

Just wondering how this sounds? Does it run off batteries as well as mains?
Would it be worth using with a digital recorder?

Thank you