Hallo,

Maybee i was missinderstood. In the Studio my Drums were recorded the Recordingroom had a very lively, open and undamphed Acustic. The Mics were placed in a close Mic Position. I don t know the selected Pattern but probably it was cardioid. We had a lot from the other Drums on the Tommics with the C 12 a. The Sound of the Crosstalk was Great, so no Phaseissues.

I think the Mic is great for Toms and Overheads like Matt mentioned because of the low THD of the Cathodefoller. If You use this Mic on a loud Source like heavy played Toms, the integration of the Pad from the C12b may be a good Idea.

The dc Resistance of the Transformerwindings doesn t say anything about the Turnratio or the ac Resistance at different Frequencys. If You have a Induction Meter set it to the lowest Testfrequency and meassure the Induction of both Windings. If You have both Results You can calculate the Turnratio.

Take the Root of L1:L2.

Exampel: L1 = 100 H. L 2 = 1 H 100:1 = 100 Root of 100 = 10. Ratio is 10:1.

But that s not the whole Story. If You use a Induction Meter the meassuring Frequency is too high in most Cases. The best Way how to analyse a Transformer is the Way CJ explains here.

CJ :

you can check the OPT low freq pri inductance with a generator and ammeter,

use Ohms Law and Inductive Reactance formulae, E/I=R and XL = 2 pi f L

apply 10 volts @ 10 hz thru the current meter into the pri,

math goes like this, use 1 ma ac as example for current,

10 volts / .001 amps - ac = 10,000 ohms reactance,

divide 10,000 ohms reactance by 10 hz and again by 6.28 ,

so 10,000/10 = 1000, 1000/6.28 = 159 Henries,

let say you read 10 ma at 10 hz and 10 volts,

10 / .01 amps -ac = 1000 ohms reactance

1000 ohms reactance / 10 hz = 100, 100/6.28 = 15.9 Henries,

i do not know what the pri Henries should be on the OPT, maybe Gus knows,

here is a chart for figuring out inductance using 10 volts at 10 Hz

ma H

1 159.2

2 79.6

3 53.1

4 39.8

5 31.8

6 26.5

7 22.7

8 19.9

9 17.7

10 15.9

11 14.5

12 13.3

13 12.2

14 11.4

15 10.6

16 10.0

17 9.4

18 8.8

19 8.4

20 8.0

Thanks again to CJ for explaining this in a Perfect Way !!!

Greatings ,

Lothar