Boss GT5 guitar multi effects pedal ...

A

Arfa Daily

Guest
Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary o/c
:-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa
 
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:VSk3m.26071$K41.8074@newsfe08.ams2...
Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary
o/c :-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa
Click to expand...
Any chance that you can open the wrappings from the windings and see if
there's a thermal fuse in there that's opened?
If not, maybe you can get a bit of an idea if there are any voltage
regulators in the power supply that you could use to derive one of the
secondary voltages. Once you have that, just apply that voltage to winding
and measure the voltage on the other winding. Derate by about 10% and you
should be pretty close. Out of circuit, of course.
Use your best judgment on the VA rating of the transformer. Use catalogs
from various manufacturers such as Hammond, Signal, etc. to get size vs. VA
estimates.

Dave M
 
On Fri, 3 Jul 2009 11:15:16 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com>wrote:

Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary o/c
:-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa
Click to expand...
The Boss GT6 uses an 18 VAC secondary.
 
"Dave M" <masondg4499@comcast.net> wrote in message
news:JuCdnXyE3Mn_c9DXnZ2dnUVZ_gSdnZ2d@giganews.com...
"Arfa Daily" <arfa.daily@ntlworld.com> wrote in message
news:VSk3m.26071$K41.8074@newsfe08.ams2...
Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary
o/c :-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa

Any chance that you can open the wrappings from the windings and see if
there's a thermal fuse in there that's opened?
If not, maybe you can get a bit of an idea if there are any voltage
regulators in the power supply that you could use to derive one of the
secondary voltages. Once you have that, just apply that voltage to
winding and measure the voltage on the other winding. Derate by about 10%
and you should be pretty close. Out of circuit, of course.
Use your best judgment on the VA rating of the transformer. Use catalogs
from various manufacturers such as Hammond, Signal, etc. to get size vs.
VA estimates.

Dave M
Click to expand...
I'm sure that there's gonna be a TF buried in the windings, Dave, and that
it will be open, but unfortunately, there's not anything that you can see -
even just its wires to whack a short across to get the tranny temporarily
running to measure its secondaries. All of the things that you suggest for
determining its ratings by 'guesstimate' are exactly what I would be doing
too, just thought I would post in case anyone had a definitive answer, to
save me the trouble of having to work it all out ...

Thanks for your thoughts :)

Arfa
 
"Meat Plow" <meat@petitmorte.net> wrote in message
news:2uhn1n.irf.19.6@news.alt.net...
On Fri, 3 Jul 2009 11:15:16 +0100, "Arfa Daily"
arfa.daily@ntlworld.com>wrote:

Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary
o/c
:-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa


The Boss GT6 uses an 18 VAC secondary.
Click to expand...
Interesting, Meat. Two of the caps in there are 1000 @ 35v so that would
fit quite nicely with 18-0-18 for about + / -26v DC, which would be ok as
input for a pair of 15v regs. I haven't looked too closely at the psu yet,
to see what mono regs are in there. Prolly be Monday now. Thanks for
looking.

Arfa
 
On Fri, 3 Jul 2009 15:24:58 +0100, "Arfa Daily"
<arfa.daily@ntlworld.com>wrote:

"Meat Plow" <meat@petitmorte.net> wrote in message
news:2uhn1n.irf.19.6@news.alt.net...
On Fri, 3 Jul 2009 11:15:16 +0100, "Arfa Daily"
arfa.daily@ntlworld.com>wrote:

Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary
o/c
:-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based on
the filter cap voltage specs.

TIA

Arfa


The Boss GT6 uses an 18 VAC secondary.

Interesting, Meat. Two of the caps in there are 1000 @ 35v so that would
fit quite nicely with 18-0-18 for about + / -26v DC, which would be ok as
input for a pair of 15v regs. I haven't looked too closely at the psu yet,
to see what mono regs are in there. Prolly be Monday now. Thanks for
looking.

Arfa
Click to expand...
Didn't have to look. My Boss Jam Station and GT6 use the same 18VAC
supply.
 
"Meat Plow" <meat@petitmorte.net> wrote in message
news:2ukgbh.krj.17.16@news.alt.net...
On Fri, 3 Jul 2009 15:24:58 +0100, "Arfa Daily"
arfa.daily@ntlworld.com>wrote:


"Meat Plow" <meat@petitmorte.net> wrote in message
news:2uhn1n.irf.19.6@news.alt.net...
On Fri, 3 Jul 2009 11:15:16 +0100, "Arfa Daily"
arfa.daily@ntlworld.com>wrote:

Anybody by any remote chance got schematics for this thing, or know the
(voltage) specs for the power transformer. Funny slimline core. Primary
o/c
:-(

Two secondaries by the looks of it, one CT, the other not. Worst case, I
could probably graft two separate transformers in. If no one has the
transformer data, then I'll just have to make an educated guess, based
on
the filter cap voltage specs.

TIA

Arfa


The Boss GT6 uses an 18 VAC secondary.

Interesting, Meat. Two of the caps in there are 1000 @ 35v so that would
fit quite nicely with 18-0-18 for about + / -26v DC, which would be ok as
input for a pair of 15v regs. I haven't looked too closely at the psu yet,
to see what mono regs are in there. Prolly be Monday now. Thanks for
looking.

Arfa


Didn't have to look. My Boss Jam Station and GT6 use the same 18VAC
supply.
Click to expand...
Furrynuff ... :)

Arfa
 
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