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Thread: BGW 7500B Questions

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    BGW 7500B Questions

    Hi Folks:

    I have a BGW 7500B. It's the cream color rack mount amp that somewhat resembles the CS800 wind tunnel amp in looks (but NOT circuitry).
    The issues is that the A channel has distortion. The schematic appears similar to the BGW 8000, but not sure of the true differences.

    Does anyone have a schematic for the 7000B amp?
    Are there any modern replacements for the uPA74 dual transistor used in the front of circuit?

    I think the uPA74 has an 80V rating, most of the current dual transistors have a 40V rating.

    Any and all help is welcome ...

    Thanks

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    Supporting Member Jazz P Bass's Avatar
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    I would CALL Peavey.

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    Ok - It was made by BGW in CA, not Peavey in MS.
    The similarity was in the wind tunnel design, although they made other fan and air cooled designs.
    Anyone have a lead on the BGW schematic or info or experience with the older (about 1983) upa74 dual transistor replacement?

    Thx

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    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by TigerAmps View Post
    Anyone have a lead on the BGW schematic or info or experience with the older (about 1983) upa74 dual transistor replacement?
    Where's our nevetslab? He's a member here, used to work for BGW. Been on the missing list a couple months now. He'd be the guy to talk to................................

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    Supporting Member The Dude's Avatar
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    If you do indeed need that part, Audio Labs of Georgia has it,......maybe. The description is a bit vague and the picture is for the PNP version. You might just call them and ask about it.

    Audio lab of Ga

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    “Yeah, well, you know, that’s just, like, your opinion, man.”

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