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eXStata DIY Electrostatic Amp for Intermediate DIYers - Page 3  

post #31 of 2969
9/30/09 at 3:05am
The Sun box is very classy. I have some of those....back in Australia.

I'll definitely be building this when it's available, as I have to give back my borrowed 007t.

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post #32 of 2969
9/30/09 at 3:07am
Thread Starter 
Quote:
Originally Posted by les_garten View Post
@Pabbi1

are you getting any hum with this setup?
Pabbi1 may have missed this post. I can only say that so far he has not reported any hum or noise.
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post #33 of 2969
9/30/09 at 4:18am
Quote:
Originally Posted by runeight View Post
Pabbi1 may have missed this post. I can only say that so far he has not reported any hum or noise.
Thanx! Just curious with the Transfos kinda close.
post #34 of 2969
9/30/09 at 4:55am
There are some very cheap 4-gang stepped attenuators on ebay which would fit this nicely. They all use the same old, cheap 23 step switch but some use Vishay resistors for about 30$.

Quote:
Originally Posted by dBel84 View Post
That adjustable bias makes me think that those panel led meters will be very handy ..dB
This could work if the meters have a very high input impedance. Otherwise the bias voltage will drop and you won't get an accurate reading.
post #35 of 2969
9/30/09 at 8:57am
Great work guys! I wish this had been around a year ago, might have saved me some serious $$.
post #36 of 2969
9/30/09 at 9:48am
Got the tubes and sockets, have been waiting on the BOM. Thanks so much all for doing this, this is going on my Christmas list.
post #37 of 2969
9/30/09 at 10:10am
Quote:
Originally Posted by les_garten View Post
@Pabbi1

are you getting any hum with this setup?
Absolutely zero. The Triads are mechanically noisy, and have gromets underneath to isolate this, but absolutely none comes through the amp, at least not that I can hear. But, isolated mounts will be required with the (really cheap) Triads.
post #38 of 2969
9/30/09 at 10:16am
Great work! It's sort cool that we have two additions to the uber-high-end and now two additions to the low-end electrostatic amplifier family after such a long time of no new designs
post #39 of 2969
9/30/09 at 10:25am
Quote:
Originally Posted by luvdunhill View Post
Great work! It's sort cool that we have two additions to the uber-high-end and now two additions to the low-end electrostatic amplifier family after such a long time of no new designs
T2, SS eXStata, Tube eXStata, whats the second uber high-end DIY design? (Assuming your not talking about the KGSS or BH)
post #40 of 2969
9/30/09 at 10:28am
Quote:
Originally Posted by pabbi1 View Post
Absolutely zero. The Triads are mechanically noisy, and have gromets underneath to isolate this, but absolutely none comes through the amp, at least not that I can hear. But, isolated mounts will be required with the (really cheap) Triads.
X2 - I have used bothe the Triads and Hammond very close to the boards in testing and there's no induced hum. This amp seems very robust when it comes to extraneous noise - I have had quite a bit of spagehtti on the bench and as long as the grounds are correct, silence...
post #41 of 2969
9/30/09 at 11:07am
Congrats all for seeing this through. I think I found my next build, eagerly awaiting a BOM and boards.
post #42 of 2969
9/30/09 at 11:09am
Quote:
Originally Posted by manaox2 View Post
T2
that would be the improved (working) "ES-1/ES-2" design
post #43 of 2969
9/30/09 at 11:14am
Quote:
Originally Posted by manaox2 View Post
T2, SS eXStata, Tube eXStata, whats the second uber high-end DIY design? (Assuming your not talking about the KGSS or BH)
He means the diy SRX.

edit: lol had a funny feeling I'd be too slow typing =]
post #44 of 2969
9/30/09 at 12:00pm
Quote:
Originally Posted by pabbi1 View Post
Absolutely zero. The Triads are mechanically noisy, and have gromets underneath to isolate this, but absolutely none comes through the amp, at least not that I can hear. But, isolated mounts will be required with the (really cheap) Triads.
Quote:
Originally Posted by wiatrob View Post
X2 - I have used bothe the Triads and Hammond very close to the boards in testing and there's no induced hum. This amp seems very robust when it comes to extraneous noise - I have had quite a bit of spagehtti on the bench and as long as the grounds are correct, silence...

Awesome, Thanx!
post #45 of 2969
9/30/09 at 12:06pm
Thread Starter 
Quote:
Originally Posted by luvdunhill View Post
Great work! It's sort cool that we have two additions to the uber-high-end and now two additions to the low-end electrostatic amplifier family after such a long time of no new designs
I wouldn't necessarily compartmentalize this amp this way. It may be inexpensive but it may not at all be low-end. The performance may be much better than the price tag indicates.
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