CAD GXL 3000

[micolas]

Hi Kingkorg!
Srećna Nova Godina!
Godt nytt år!

You know very well the types and origin of capsules used everywhere. Is it possible that the capsule in the glx3000 is the same capsule found in the t.bone sc1100?

 

[kingkorg]

Hi Kingkorg!
Srećna Nova Godina!
Godt nytt år!

You know very well the types and origin of capsules used everywhere. Is it possible that the capsule in the glx3000 is the same capsule found in the t.bone sc1100?

Srećna Nova og godt nyttår
According to recording hacks, and the images it seems to be the same one.

 

[micolas]

Srećna Nova og godt nyttår
According to recording hacks, and the images it seems to be the same one.

Mulțumesc, Kingkorg!

You confirmed some of my older suspicions.
In addition (except for the capsules) the sc1100 has the same audio circuit as the se3300a (when it was still manufactured by Feilo) and apparently with the AdvancedAudio cm87 old version (the 1G grid resistor seems to be missing in the schematic).
DC/DC in sc1100 and SE3300a follows quite faithfully the Neumann solution with Jfet and bipolar.

 

[Khron]

DC/DC in sc1100 and SE3300a follows quite faithfully the Neumann solution with Jfet and bipolar.

That might depend on the age / generation of the mic..?

The one pictured here does indeed seem to have a U87-ish DC/DC converter:
https://groupdiy.com/threads/se-electronics-z3300a.30266/
While the one on RecordingHacks looks very much like a single-transistor Schoeps-like oscillator:
http://cdn.recordinghacks.com/images//mic_extras/se/z3300a-pcb.jpg

 

[micolas]

That might depend on the age / generation of the mic..?

Yes, there were several revisions 3300.
At some point production moved from Feilo to SE.

 

[Voyager10]

As you point out, there should be a bias resistor for the FET gate (to the R10/R11 junction, I'd assume). The T1 transistor will need a base bias resistor as well (traditionally, 180K to ground, although that gives very asymmetrical clipping).

 

[AUDIO FREQ]

Nevermind guys, I think im happy with the AKG Perception 200 I have. I guess i'll just save my money for something better in the future.