DIY Audio Analyzer with AK5397/AK5394A and AK4490

[anatech]

Hey Kevin,
My needs are immediate too. I just had some heavy expenses that popped up.

-Chris

 

[agdr]

My target is to launch the official group buy next week. I cannot promise it, but that's my target.

And please post those specifications, if possible!

 

[diyaudnut]

looking forward to the GB

 

[soongsc]

Looking forward to this as well.

 

[waltzingbear]

looking forward to final spec sheet



Alan

 

[DigiAudioCon]

What a great job Jens!

could the AK4492ECB 127dB 768kHz/32-bit 2ch Premium DAC be considered ?

Looking forward to GB.

 

[soongsc]

I am wondering what the input impedance and the I/o signal levels are going to be? Are these balanced or unbalanced i/o?

 

[JensH]

@soongsc

Please check the first post. The information is available there. The detailed specification will be available soon.

 

[soongsc]

Thank you! I assume it runs full duplex at all frequencies?

 

[JensH]

Yes it does.

@DigiAudioCon
The AK4492 does indeed look like an interesting alternative. It will not make it into the first version though.
I have looked at bit at the AK4497, but I have not reached a final conclusion yet.

 

[soongsc]

I actually like this kind of design even if it needs to be plugged into the line power. The high input impedance is what I like for doing DUT impedance measurements. The test voltage range give lots of flexibility for testing. How much is this expected to cost?


Sent from my iPhone using Tapatalk

 

[Variac]

Around $1k
It's in a post somewhere.

 

[kevinkr]

The total cost will vary a bit depending on the total number of participants in the group buy.

I am definitely in for one unit.

 

[anatech]

Ditto

 

[agdr]

The AK4492 does indeed look like an interesting alternative. It will not make it into the first version though.
I have looked at bit at the AK4497, but I have not reached a final conclusion yet.

Lol, I can already see me selling off my V1.0 and buying V2.0 when ready in a year or two.

Question: would Neutrik NA2FBNC adapters work on the inputs to produce one single-ended BNC input from the balanced XLR?
The adapter is pre-wired with XLR-2 as signal and XLR 1 & 3 tied together for ground:

http://www.mouser.com/ProductDetail/Neutrik/NA2FBNC/?qs=sGAEpiMZZMv0W4pxf2HiV9y0EyfHsAgRgumMxfnXyag%3d

Looks like they also have an unwired NA2FBNC-UW for other wiring configurations.

 

[Lbud4]

Patiently waiting to purchase one

 

[soongsc]

Around $1k
It's in a post somewhere.

Quite reasonable.


Sent from my iPhone using Tapatalk

 

[bnae38]

sub'd.

Use a prism Dscope III at work every day and would kill for one at home (forget the aes stuff..)

Mostly for use with car audio repairs/tweaks etc in my spare time.

Cool stuff

Potentially in for a GB, don't tell wife...

 

[JensH]

Hi All,
I am happy to finally announce the official group buy for the Audio Analyzer. It took longer to get to this point than I had hoped for, but now it has finally come to the point where we are ready to receive orders.

Thanks for all your inputs so far. And for the patience.

You can find the group buy here:
http://www.diyaudio.com/forums/group-buys/306322-gb-rtx6001-audio-analyzer-ak5394a-ak4490.html

Please keep technical discussions in this thread. And commercial discussions in the GB thread.

Jens

 

[agdr]

JensH - thanks for the specifications! Looks terrific.

One request, in addition to THD I would love to see the levels of specifically the 2nd and 3rd harmonics at 0BV and -10dBV. It has been a problem (high internal harmonic generation) on the QA401 tester.

Also I can see from the photos that I managed to get the gender reversed in my info request above about a BNC input adapter. Should be a NA2MBNC:

http://www.mouser.com/ProductDetail/Neutrik/NA2MBNC/?qs=sGAEpiMZZMv0W4pxf2HiV9y0EyfHsAgRA31%252bJkUHaH4%3d

or NA2MBNC-UW for the unwired one.

Thank you!