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Vintage Audio (record players, hi-fi etc) Amplifiers, speakers, gramophones and other audio equipment. |
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25th Mar 2023, 9:03 pm | #1 |
Tetrode
Join Date: Jun 2020
Location: Basildon, Essex, UK.
Posts: 94
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Checking DC offset on Sony TA3200F
Hi, Please could someone advise me, if you can test the DC offset without a load attached with this Power Amp.
Also, as it has output levels do I keep these turned to minimum like a volume control. Or am I best to connect a preamp and set the volume to minimum? Thanks, Colin. |
26th Mar 2023, 12:03 am | #2 |
Nonode
Join Date: Mar 2005
Location: Nuneaton, Warwickshire, UK.
Posts: 2,033
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Re: Checking DC offset on Sony TA3200F
Hi Colin,
Others may know better, but I would have thought that it's best to measure for DC offset without a load connected, in case it's way too high and may damage the speaker. Certainly power amps I built years ago had two main measurements, first set quescent current, then measure DC offset at the output, usually a couple of hundred millivolts. Cheers Aub
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26th Mar 2023, 12:06 am | #3 |
Nonode
Join Date: Mar 2005
Location: Nuneaton, Warwickshire, UK.
Posts: 2,033
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Re: Checking DC offset on Sony TA3200F
Input to the power amp should be shorted, or volume set to minimum.
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Life's a long song, but the tune ends too soon for us all. |
26th Mar 2023, 8:35 am | #4 |
Tetrode
Join Date: Jun 2020
Location: Basildon, Essex, UK.
Posts: 94
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Re: Checking DC offset on Sony TA3200F
Thanks for your reply Aub,
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