Gang,
Got a pair of the CineMag S217D and they look pretty nice and looking to build a line preamp with them.
https://cinemag.biz/output/output.php
So basically a 12.5K primary to 600 ohm output. The tertiary is throwing me for a bit of a loop. I see 22.2: 4.96: 1 ratio and I take it 1 = 600 puts the primary a bit higher than the specd 12.5K, (13.32K) so is the tertiary 4.96 or ~3K?
I would imagine the loading of the tertiary would effect the primary.
The Pultec seems to be the only schematic I can see using this and this is a balanced usage all the way through.
I was thinking of using a 220H loading some med mu tube and feeding back through the cathode with the tertiary with like 1-2dB of feedback. Parafeed 1.5uF blocking cap.
Thoughts? Help?
Thanks,
Gordon
Got a pair of the CineMag S217D and they look pretty nice and looking to build a line preamp with them.
https://cinemag.biz/output/output.php
So basically a 12.5K primary to 600 ohm output. The tertiary is throwing me for a bit of a loop. I see 22.2: 4.96: 1 ratio and I take it 1 = 600 puts the primary a bit higher than the specd 12.5K, (13.32K) so is the tertiary 4.96 or ~3K?
I would imagine the loading of the tertiary would effect the primary.
The Pultec seems to be the only schematic I can see using this and this is a balanced usage all the way through.
I was thinking of using a 220H loading some med mu tube and feeding back through the cathode with the tertiary with like 1-2dB of feedback. Parafeed 1.5uF blocking cap.
Thoughts? Help?
Thanks,
Gordon