mylesgm
Well-known member
So I've just secured a Chilton CM2 with 6 channels of mic pres and 4 channels of stereo line pre, 2 aux and 2 bus. This is a really neat little console with some suprising features. Like belclere input tx's for the mic pre's (same as neve 54 series), sowter tx for line inputs, PandG faders, direct outs with tx output optional (missing from mine), 3 band eq with mid sweep that goes from 100 to 10k and low filters, phantom switching on each channel, large toroid tx for output (haven't sussed out brand), on board oscillator and talkback with slate etc.
Anyway I want to look at doing some upgrades adding the tx outputs on the direct outs and was hoping for some advice. The manual with full schematics is here http://www.mik-el.no/manuals/cm2manualE.pdf
The opamps are ne5534 Low noise for mic standard ne5534 for line drive amp, tl071 and tl072 for eq's and filters. Power rails are +/- 15v and 48v.
So my first thought is the output tx on direct outs. I could use a 600:600 or a 10k:600 or perhaps I could use one of classic api's but they seem to be rated for a 75 ohm input and I can't see that this circuit would drive a 75 ohm load. What about replacing the tl072's?
Anyway what are some of the things you see in the circuit that might benefit from a spruce up?
M
Anyway I want to look at doing some upgrades adding the tx outputs on the direct outs and was hoping for some advice. The manual with full schematics is here http://www.mik-el.no/manuals/cm2manualE.pdf
The opamps are ne5534 Low noise for mic standard ne5534 for line drive amp, tl071 and tl072 for eq's and filters. Power rails are +/- 15v and 48v.
So my first thought is the output tx on direct outs. I could use a 600:600 or a 10k:600 or perhaps I could use one of classic api's but they seem to be rated for a 75 ohm input and I can't see that this circuit would drive a 75 ohm load. What about replacing the tl072's?
Anyway what are some of the things you see in the circuit that might benefit from a spruce up?
M