Re: Ampliphone BU406D waveform

It sounds like you may have a bad xfmr. If you have verified the supplies.
And the Bu406 is known good. The waveform can be distorted at the base by an
excessive load. The output should be getting hot in that case.
"Christopher X. Candreva" wrote:

> Still working on this Ampliphone HV board, it now looks like a bad waveform
> at the BU406D. I have a good wave out of the 555, right up to the
> input of the MPSU07. The MPSU07 checks OK, and I've replaced it with an
> SK3199 to be sure.
>
> On the output of the MPSU07 (at R13) I have a aprox +60v peak half sine
> wave. I assume this is not correct. As I said, the MPSU checks, I've
> replaced it anyway, and I see the same thing.
>
> So -- I'm not really sure what to check next -- the T1 transformer ?
> `
> ==========================================================
> Chris Candreva -- chris@westnet.com -- (914) 967-7816
> WestNet Internet Services of Westchester
> http://www.westnet.com/
> ---------------------------------------------------------------------------
> ** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
> ** message body to vectorlist-request@synthcom.com. Please direct other
> ** questions, comments, or problems to vectorlist-owner@synthcom.com.

---------------------------------------------------------------------------
** To UNSUBSCRIBE from vectorlist, send a message with "UNSUBSCRIBE" in the
** message body to vectorlist-request@synthcom.com. Please direct other
** questions, comments, or problems to vectorlist-owner@synthcom.com.
Received on Sun Jan 26 16:40:42 2003