bof

TC Gold Channel preamp mod
« on: January 30, 2008, 04:26:43 PM »
A question from a totally ignorant newbie here:

I have a TC Electronic Gold Channel dual mic pre. The digital processing is good as is the AD/DA but the analog side (preamps) leave something to be desired.

Would it be worth (somebody) taking a soldering iron to it to upgrade the preamp circuitry?

If it is feasible, who would be able to perform the surgery required?

Many thanks


pucho812

TC Gold Channel preamp mod
« Reply #1 on: January 30, 2008, 06:39:14 PM »
talk with Jim Williams :razz:
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

gyraf

TC Gold Channel preamp mod
« Reply #2 on: January 31, 2008, 06:01:50 AM »
I was sitting in with TC at the design phase of that unit - and did a lot of early beta testing.

Basically, the idea with the unit is to achieve the best of specs "on paper" - any alternative, no matter how good sounding, was excluded from start.

Imo, upgrading the analogue section will take a lot more than just the simple swapping of opamps.

Jakob E.
..note to self: don't let Harman run your company..

tony dB

TC Gold Channel preamp mod
« Reply #3 on: January 31, 2008, 06:10:08 AM »
Quote from: "gyraf"
...
Basically, the idea with the unit is to achieve the best of specs "on paper" - any alternative, no matter how good sounding, was excluded from start.

Jakob E.


 :shock: great target TC !

gyraf

TC Gold Channel preamp mod
« Reply #4 on: January 31, 2008, 06:14:21 AM »
:razz: yeah - I was pushing hard for a Lundahl at the input - but no luck, as this would make the distortion figure rise above 0.0000000X%  :?
..note to self: don't let Harman run your company..

tony dB

TC Gold Channel preamp mod
« Reply #5 on: January 31, 2008, 06:21:51 AM »
one of the reasons a few friends ask me to built them something is mainly because they like the sound of my stuff, I never cared about those 0,00000xxx number at all. If the ear likes it, it is right  :wink:
Same with iron  :green: , if you like what you hear, the brand is less important  :green:  :green:

Is the goldchannel modable with a Lundahl Jakob?

okgb

TC Gold Channel preamp mod
« Reply #6 on: January 31, 2008, 08:06:00 AM »
I think most people don't notice a difference until it is in the
single digit range  [ 2 or 3  ] % , certainly the difference between
.001 and . 01 is still quite small by a factor
 Gee they could have put a switchable xfmr , but i'm a lundahl from
using the 1538lx .

Btw , how a higher ratio input was not used on the g9 ?
GKB Audio / Greg Boboski

gyraf

TC Gold Channel preamp mod
« Reply #7 on: January 31, 2008, 08:19:37 AM »
Not easily mod'able iirc - I think it uses a INA217 or equivalent micamp-in-a-box..
..note to self: don't let Harman run your company..

bof

TC Gold Channel preamp mod
« Reply #8 on: January 31, 2008, 11:29:22 AM »
One possible alternative would be to buy a good pair of mic pre's and run them into the TC.

Would switching the inputs to 'Line' bypass the internal pre's and take me straight to the AD?

The signal flow diagram is here http://www.tcelectronic.com/media/GoldCH_US_113.pdf on page 11 if it's any help.

Many thanks for helping me out folks.

tony dB

TC Gold Channel preamp mod
« Reply #9 on: January 31, 2008, 12:47:33 PM »
a better possible alternative would be to built a good pair of mic pre's and run them into the TC  :green:


By going line in, you avoid the circuitry (and pad) related to the mic input. One gain step before you hit the AD-stage.


Peter Simonsen

TC Gold Channel preamp mod
« Reply #10 on: January 31, 2008, 03:38:46 PM »
Quote from: "gyraf"
I was sitting in with TC at the design phase of that unit - and did a lot of early beta testing.

Basically, the idea with the unit is to achieve the best of specs "on paper" - any alternative, no matter how good sounding, was excluded from start.

Imo, upgrading the analogue section will take a lot more than just the simple swapping of opamps.

Jakob E.


ha-ha.. :green:  It never ever fails to amaze the hell out of me..how most "designers" are after numbers in audio design..when on earth will some of them stop and start to listen???

Kind regards

Peter


 

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