How can we improve a Krohn-Hite 4200A Oscillator to reduce it's distortions ? - diyAudio
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Old 23rd October 2011, 08:45 PM   #1
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Default How can we improve a Krohn-Hite 4200A Oscillator to reduce it's distortions ?

Hello

How can we improve a Krohn-Hite 4200A Oscillator to reduce it's distortions ?

And anybody do have the schematic of this oscillator ? (I can't find it with Google)

Thank

Bye

Gaetan
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Old 26th October 2011, 01:15 PM   #2
klewis is offline klewis  United States
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Quote:
Originally Posted by gaetan8888 View Post
Hello

How can we improve a Krohn-Hite 4200A Oscillator to reduce it's distortions ?

And anybody do have the schematic of this oscillator ? (I can't find it with Google)

Thank

Bye

Gaetan
For the schematics, look here: Audio Circuit Denmark

As for improving the performance, first step, tune up the unit following the directions in the service manual, after that, replace volume pot with a good 10 turn, consider a battery supply.

Ken
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Old 26th October 2011, 04:20 PM   #3
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Hello

This web site do have only the Krohn-Hite 4400 and 4402, they don't have the Krohn-Hite 4200.

Thank

Bye

Gaetan
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Old 26th October 2011, 05:21 PM   #4
klewis is offline klewis  United States
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I wasn't aware that they made a 4200A, maybe recheck the model number...
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Old 26th October 2011, 05:31 PM   #5
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Hello

I've recheck the model number, and I really have a Krohn-Hite 4200A Oscillator.

Do you know the difference between the 4200A and the 4402 model ?

Thank

Bye

Gaetan
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Old 26th October 2011, 05:54 PM   #6
kevinkr is offline kevinkr  United States
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Plenty of service manuals available for the 4200A, the only problem is you will have to pay for one..
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Old 26th October 2011, 06:18 PM   #7
klewis is offline klewis  United States
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I don't know the difference between 4402 and 4200. The factory may have service manuals for you. Yes, they will charge you for it, but, maybe you can get one for the specific revision number/letter of your device. I found that on mine, there are differences between the schematic and part numbers for the revision number I have 4402A(d) and the drawings 4402A(f). I recently ordered some replacement parts, they were very helpful. Just go to their website.
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Old 27th October 2011, 08:24 PM   #8
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Hello

I finally found the schematic diagram of my Krohn-Hite 4200A.

How can I improve it to reduce it's distortions ?

Thank

Bye

Gaetan
Attached Images
File Type: gif KROHN-HITE-4200A-schematic.gif (190.5 KB, 146 views)
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