Sontec mic preamp repair.... Burgess??? Fletcher???

Archived from groups: rec.audio.pro (More info?)

In article <1125786429.995527.294710@f14g2000cwb.googlegroups.com>,
"kellykevm" <profkkelly@yahoo.com> wrote:

> My Sontec MPA-1 stereo mic preamp is longing for it's bi-annual
> vacation trip to Goldbond VA. It usually sounds great but has been
> repaired three times already in it's 12 year life (this will be four).
> Unfortunately, the phone number I have for Sontec is disconnected.
> Currently, one channel sounds fine, but the left channel thumps once
> every two seconds or so, while passing sigmal. There is also a white
> noise kind of sound that ramps up (crescendos) just before each thump,
> kind of like an old school reverse reverb that some of us old f#%*ers
> were guilty of overusing back in the eighties.
> Is Burgess/Sontec still in business? If not, who would best repair this
> thing?
> Thanks in advance.
>
> Kevin



If I had one and couldn't contact Burgess/Sontec, I'd get it to either
Dan Zellman in NYC or Bobby Alach
<http://www.alactronics.com/repair/repair.htm> in MA.

Give Fletcher a call on Tuesday. He don't hang here no more.




David Correia
www.Celebrationsound.com

Archived from groups: rec.audio.pro (More info?)

kellykevm <profkkelly@yahoo.com> wrote:
>My Sontec MPA-1 stereo mic preamp is longing for it's bi-annual
>vacation trip to Goldbond VA. It usually sounds great but has been
>repaired three times already in it's 12 year life (this will be four).
>Unfortunately, the phone number I have for Sontec is disconnected.

Burgess will not answer the phone at his home either. He's there, and
he shows up at church, but letters and cards to his mail go unanswered
and a letter left on his doorstep was ignored.

>Currently, one channel sounds fine, but the left channel thumps once
>every two seconds or so, while passing sigmal. There is also a white
>noise kind of sound that ramps up (crescendos) just before each thump,
>kind of like an old school reverse reverb that some of us old f#%*ers
>were guilty of overusing back in the eighties.

This sounds like a servo circuit that is motorboating. I'd get your
local tech to look at decoupling capacitors and the servo filter
cap.

>Is Burgess/Sontec still in business? If not, who would best repair this
>thing?

I don't know, and I have no manuals for the preamp so it's going to be
a matter of having your tech draw the schematic out for himself. As I
recall there's really nothing too weird inside there, at least compared
with the Sontec equalizers.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Archived from groups: rec.audio.pro (More info?)

Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:
>Scott Dorsey wrote:
>
>> kellykevm <profkkelly@yahoo.com> wrote:
>> >My Sontec MPA-1 stereo mic preamp is longing for it's bi-annual
>> >vacation trip to Goldbond VA. It usually sounds great but has been
>> >repaired three times already in it's 12 year life (this will be four).
>> >Unfortunately, the phone number I have for Sontec is disconnected.
>>
>> Burgess will not answer the phone at his home either. He's there, and
>> he shows up at church, but letters and cards to his mail go unanswered
>> and a letter left on his doorstep was ignored.
>
>Is the guy a freak ?

Oh, yes, but he's been a freak for the past forty years. I suspect you
have to be something of a freak just to live up in the mountains there.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."