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Krell KAV 300CD Transformer Outputs
Krell KAV 300CD Transformer Outputs
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Old 6th March 2015, 03:49 PM   #1
quad121 is offline quad121  United Kingdom
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Default Krell KAV 300CD Transformer Outputs

Can anyone who has a Krell KAV 300CD please measure the secondary outputs of the transformer.
I would be much appreciated
Thank you Paul
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Old 29th March 2020, 07:41 PM   #2
Mastersolder is offline Mastersolder  Switzerland
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Hello Paul

I have the same problem with my Krell 300CD now.
Can you tell me the secondary AC Voltages of the transformer?

Especially these for the +/- 18 Volt rails of the output stage PSU will be helpfull as a reference.

Best regards
Marcel
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Old 30th March 2020, 03:44 AM   #3
PRR is offline PRR  United States
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Krell KAV 300CD Transformer Outputs
> secondary AC Voltages of the transformer? Especially these for the +/- 18 Volt

Analysis is trivial. Using a blunt stick, each junction needs nearly 1 Volt to stay alive. Counting up from 18V out, we need more than 22V in. OTOH over 50V in is pointless and will will blow-up some caps. Very likely the happy DC is somewhere in the middle. My sliderule says 23.xxx? VAC.
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Old 30th March 2020, 07:02 AM   #4
Mastersolder is offline Mastersolder  Switzerland
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Hi RRR

This sounds very reasonable and competently.
Thank you for the fast reply!

Regards
Marcel
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