Low-distortion Audio-range Oscillator - Page 157 - diyAudio
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Old 13th January 2013, 11:16 PM   #1561
DDB is online now DDB  United States
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Victor's oscillators measure as specified or better. For a fixed frequency it is by far the best choice. You can't get the parts for the price.
This is great but I havent seen any specs for the 10K version yet. Does anyone know what they are and a link to them on ebay or elsewhere?

Also do they need an ~ + 35V supply to operate or can a +/- 15V be used?

Larry
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Old 13th January 2013, 11:26 PM   #1562
1audio is offline 1audio  United States
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They are designed for a floating 35V supply. This gets the ground currents out of the picture. I will be using a battery array but its a little over the top. A simple 35V supply should suffice. I think you could even do something that is not regulated. You could also replace the series 100 Ohm resistor with a current source and have even more supply isolation and flexibility.
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Old 14th January 2013, 12:32 AM   #1563
davada is offline davada  Canada
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They are designed for a floating 35V supply. This gets the ground currents out of the picture. I will be using a battery array but its a little over the top. A simple 35V supply should suffice. I think you could even do something that is not regulated. You could also replace the series 100 Ohm resistor with a current source and have even more supply isolation and flexibility.
I'm using a battery array. It sure is quiet.
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Old 14th January 2013, 11:10 AM   #1564
mkc is offline mkc  Denmark
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Hi,

In case you are interested, the QA-400 has now been released for sale.

Mogens
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Old 14th January 2013, 03:53 PM   #1565
RNMarsh is online now RNMarsh  United States
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I recieved my QA400 yesterday. Getting to know it and see how it can serve my purposes re measuring extreamly low level harmonics in conjunction with other test equipment. -RNM
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Old 15th January 2013, 11:52 AM   #1566
ghg is offline ghg  Austria
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Imo, it's time for a dedicated QA400 thread ...
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Old 20th January 2013, 11:25 PM   #1567
RNMarsh is online now RNMarsh  United States
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I'm using a battery array. It sure is quiet.
What are you doing now to the 339A?... I'm waiting for more parts.... to repair my 339A. RNM
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Old 21st January 2013, 01:18 AM   #1568
davada is offline davada  Canada
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What are you doing now to the 339A?... I'm waiting for more parts.... to repair my 339A. RNM

What went on it?

I haven't done any more on the 339a.
I'm waiting on a PCB for the Twin T and some water slide decal sheets.
Once the Twin T is complete then I can go at it again.

Sure has gotten quiet around here.
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Old 21st January 2013, 01:53 AM   #1569
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Well I'm starting to look for an oscillator? A bit confused.

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Old 21st January 2013, 02:48 AM   #1570
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You're confused. .... ..... .... You forgot to tell us what you are confused about.
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