joulupukki
Well-known member
I assume that it's fine to run the JLI TSC-2 at 60V? Is there a way to know the maximum voltage?
Max voltage for JLI TSC-2 capsule?
- Thread starter joulupukki
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I think the JLI TSC-2 is used in a number of U87AI-type circuits with 60V on the diaphragm, so I would bet it could take 60. Not sure how much higher it could go though.
joulupukki
Well-known member
60V seems to be a good target. Looking at changing my Bouchard D-87 build to get better sensitivity and just thinking 60V is probably the way to go. Thanks!
Екатерина
Well-known member
In fact, the vast majority of Chinese capsules cannot work well above 60V, and their polarization voltage is often around 55V
Good luck with that, without a near-complete circuit overhaul...
No complete overhaul required. This little DC/DC converter module, measuring 10 x 20mm, will soon ship to the other side of the Pond and should fix it. It replaces C13. And there are some other capacitor and resistor changes to be done. We just needed to know which voltage would be allowed on the capsule. The module can go up to almost 80V, but that would probably have been too much.
It's basically the same circuit as in my KM84++ design, with one additional stage added to the voltage multiplier.
Attachments
Just noticed @Glenn Wardle asked the same question, to which @micolas replied that he went up to 80V without problems:
Post in thread 'TSC2 capsule polarisation voltage - what do most folks go with?' https://groupdiy.com/threads/tsc2-c...what-do-most-folks-go-with.87874/post-1156130
Other than a collapsing capsule, are there any other issues to be expected? What I've learned from other, similar discussions is that Frequency Response is not affected, though that could be expected due to the higher tension on the membrane. I was thinking more of increased sensitivity to moisture or pollution.
Jan
Post in thread 'TSC2 capsule polarisation voltage - what do most folks go with?' https://groupdiy.com/threads/tsc2-c...what-do-most-folks-go-with.87874/post-1156130
Other than a collapsing capsule, are there any other issues to be expected? What I've learned from other, similar discussions is that Frequency Response is not affected, though that could be expected due to the higher tension on the membrane. I was thinking more of increased sensitivity to moisture or pollution.
Jan
@kingkorg documented the influence of the capsule's polarization voltage on the frequency behavior of the microphone. He made good, objective measurements. He went further than me, iirc he went up to 120v on a Rode NT1kit capsule.
My strictly personal choices are dictated by the behavior in the entire circuit, i.e. what I want the microphone to offer me: spl, headroom, clarity, saturations/harmonics, (electric or magnetic) a certain coloration, character, etc., according to the source, the scenario, artistic, aesthetic intention.
Ultimately, it's a matter of personal preference.
So, friends, let's push the DIY pedal as much as we want!
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