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Warwick Sonic III amp
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N_Cook
Mar 15, 2009, 10:04:12 AM3/15/09
to
Not the cause of the problem that it is here for repair, but I cannot return
it to the owner with this glaring potential (in both senses) fault,
presumably the same for all such Warwick amps.
One large heatsink with +75V on it and the other at -75V and 2.5mm between
the two , both mounted on standard polyester pcb with chassis standoffs well
away from the heatsinks. Discharged both before this test of course,
requires only 1.5Kg of force between the 2 heatsinks to narrow the gap to
1.5mm.
Have amp designers never seen the internals of their stuff
resonating/oscillating mounted in or on speaker cabs, especially bass amps
such as this?
it to the owner with this glaring potential (in both senses) fault,
presumably the same for all such Warwick amps.
One large heatsink with +75V on it and the other at -75V and 2.5mm between
the two , both mounted on standard polyester pcb with chassis standoffs well
away from the heatsinks. Discharged both before this test of course,
requires only 1.5Kg of force between the 2 heatsinks to narrow the gap to
1.5mm.
Have amp designers never seen the internals of their stuff
resonating/oscillating mounted in or on speaker cabs, especially bass amps
such as this?
--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/
Message has been deleted
Arfa Daily
Mar 16, 2009, 5:09:20 AM3/16/09
to
"Meat Plow" <me...@petitmorte.net> wrote in message
news:2lhalr....@news.alt.net...
> On Sun, 15 Mar 2009 14:04:12 -0000, "N_Cook" <div...@tcp.co.uk>wrote:
>
>>Not the cause of the problem that it is here for repair, but I cannot
>>return
>>it to the owner with this glaring potential (in both senses) fault,
>>presumably the same for all such Warwick amps.
>>One large heatsink with +75V on it and the other at -75V and 2.5mm between
>>the two , both mounted on standard polyester pcb with chassis standoffs
>>well
>>away from the heatsinks. Discharged both before this test of course,
>>requires only 1.5Kg of force between the 2 heatsinks to narrow the gap to
>>1.5mm.
>>Have amp designers never seen the internals of their stuff
>>resonating/oscillating mounted in or on speaker cabs, especially bass amps
>>such as this?
>
> mixer. Left me sitting scratching my noggin wondering what the hell
> were they thinking.
Well Meat, you answered your own question there ! It was a Behringer, so
they weren't thinking at all ... !! d;~}
Arfa
Message has been deleted
jeff
May 10, 2020, 12:06:25 AM5/10/20
to
Meat Plow <me...@petitmorte.net> wrote:
>>> Ran into similar design phenomena in a Berringer Euro Power powered
>>> mixer. Left me sitting scratching my noggin wondering what the hell
>>> were they thinking.
>>
>>Well Meat, you answered your own question there ! It was a Behringer, so
>>they weren't thinking at all ... !! d;~}
>>
>>Arfa
>>
>
> Heh I don't even know how to spell the damn name. I won't work on that
>>> Ran into similar design phenomena in a Berringer Euro Power powered
>>> mixer. Left me sitting scratching my noggin wondering what the hell
>>> were they thinking.
>>
>>Well Meat, you answered your own question there ! It was a Behringer, so
>>they weren't thinking at all ... !! d;~}
>>
>>Arfa
>>
>
> crap unless it's store stock. However I was mildly impressed
> (sonically) with the BX4500 amp. I won't look inside, that will no
> doubt spoil things.
Makes me want to resurrect my old Harmon Kardon A500 tube amp with its
ambiance knob set high!
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