B&k St-202

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kobo
kobo Posts: 3
edited April 2008 in Electronics
Hi, I just got a B&K ST-202 and it does not have the original transformer. Does anybody have a B&K ST-202 to tell me the original specifications?
I know it's 300VA but I don't know the output in volts.
I think it should write on the label of the transformer or you can use a multimeter.

Thanks
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  • Systems
    Systems Posts: 14,872
    edited March 2008
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    Welcome kobo,do you know or are the DC rail voltages indicated on the amps circuit board somewhere?If so then you can calculate the AC voltage needed to achieve that level of DC.
    Did the previous owner swap the tranny due to failure of the original?Maybe give B&K a call or an email.
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  • dorokusai
    dorokusai Posts: 25,640
    edited March 2008
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    I have one downstairs. Give me a couple hours and I'll see what I can read on the toroid.
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • MADGSF
    MADGSF Posts: 603
    edited March 2008
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    Well I just so happen to have a PDF showing all discontinued B&K amplifier specs, as any proper B&K fan boy should :).

    You don't mention that it's a plus so here are the specs for the ST-202. About the only thing I left off were deminsions.

    Produced: 88-93
    Watts per channel: 8 ohms: 150, 4 ohms: 200
    Current Peak-to-Peak Per Channel: 28 amps
    Dynamic Headroom: 1.5dB
    Frequency Response: 5-45KHz
    Dampening Factor @50Hz: 180
    Input Sensitivity: 1.4v
    Input Impeadance: 24K
    THD: 0.09%
    Slew Rate: 14v/us (per micro second)
    S/N: 95dB
    AVR: Elite VSX-21TXH
    Amplifier: B&K 7250 Series ii
    Misc: Velodyne SMS-1
    Mains: RTi-10
    Center: CSi-5
    Rear: Boston DSi460
    Sub: SVS PC-Ultra
    TV: Panasonic TC-P58V10
    DVD: Panasonic DMP-BD60K
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  • Systems
    Systems Posts: 14,872
    edited March 2008
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    He wants to know the secondary voltage of the transformer,do you have a schematic?
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  • MADGSF
    MADGSF Posts: 603
    edited March 2008
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    Oops, got excited and didn't read the entire post. Sorry don't have a schematic so no help here.
    AVR: Elite VSX-21TXH
    Amplifier: B&K 7250 Series ii
    Misc: Velodyne SMS-1
    Mains: RTi-10
    Center: CSi-5
    Rear: Boston DSi460
    Sub: SVS PC-Ultra
    TV: Panasonic TC-P58V10
    DVD: Panasonic DMP-BD60K
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  • kobo
    kobo Posts: 3
    edited April 2008
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    thanks for replies, the DC is not written anywhere and I don't know for sure if the new transformer put by the previous owner is just like the original. it's a unitra transformer :(
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  • kobo
    kobo Posts: 3
    edited April 2008
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    Hi, does anyone have the a ST-202 to check the secondary voltage on the transformer please?
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