wrote:
Some very sucessful high end audio
designs implement a separate power supply for EACH stage . And none of
them seem to favor switchers!

They probably don't have to buy their own electricity. If I was still
using my 2 [ea] 9 Amp linear supplies my electric bill would be $100 a
month higher. I got the switcher to save energy. The fact that it is
tiny, quiet, and cool is all gravy.

There's an electric motor at a quarry, over a mile away, that has some
sparky brushes. I can tell when they turn it on and off. This is a
very quiet (QRM) spot.

On Feb 17, 5:24*am, dave wrote:
wrote:
Some very sucessful high end audio
designs implement a separate power supply for EACH stage . And none of
them seem to favor switchers!

They probably don't have to buy their own electricity. *If I was still
using my 2 [ea] 9 Amp linear supplies my electric bill would be $100 a
month higher. *I got the switcher to save energy. *The fact that it is
tiny, quiet, and cool is all gravy.

There's an electric motor at a quarry, over a mile away, that has some
sparky brushes. *I can tell when they turn it on and off. *This is a
very quiet (QRM) spot.

I had exactly this same problem last week when a bunch of guys about a
half mile away were doing road work with a compressor. The noise
level from that mess was an intermittent 20 over S9, and the MFJ-1026C
had a hard time wiping it. Thank goodness they're gone.

On Feb 17, 9:58*am, Bob Dobbs wrote:
bpnjensen wrote:
The noise
level from that mess was an intermittent 20 over S9, and the MFJ-1026C
had a hard time wiping it.

Next time try repositioning your sense antenna.

--

Operator Bob
Echo Charlie 42

I guess I could have - but both antennae are suspended well above my
roof, and I work days ;-)

I have an old power supply thingy here, I bought it at a Goodwill store
a bunch of years ago.I am looking it over right now.It says on the metal
plate on the front,,,

Acme ACME Electric Corporation CUBA, NEW YORK VOLTROL MADE IN U.S.A.
TYPE T-8350 INPUT 115 VOLTS 50-60 CY. OUTPUT 6 AMP MAX.PATENTS NO'S
2009013 2061452

The device is HEAVY!, must have a HEAVY coil inside, I reckon.There is a
large round knob with a metal pointer underneath the knob and around the
perimeter of the knob, 70 80 90 100 100 (I did not mistype that, 100
100) 110 LINE 120 130

At the bottom left hand corner there is a toggle switch for ON OFF.In
the middle above the metal plate with the knob there is a meter/gauge
which says VOLTS A.C. 0 30 60 90 120 150.At the top right hand corner of
the device there is a round plug socket.
There is a handle mounted on top of the device.
I plugged it into a wall outlet.I think it works A OK.Of course it is
A.C.Voltage only.
cuhulin

On Feb 17, 8:26*pm, wrote:
I have an old power supply thingy here, I bought it at a Goodwill store
a bunch of years ago.I am looking it over right now.It says on the metal
plate on the front,,,

Acme ACME Electric Corporation CUBA, NEW YORK VOLTROL MADE IN U.S.A.
TYPE T-8350 INPUT 115 VOLTS 50-60 CY. OUTPUT 6 AMP MAX.PATENTS NO'S
2009013 2061452

The device is HEAVY!, must have a HEAVY coil inside, I reckon.There is a
large round knob with a metal pointer underneath the knob and around the
perimeter of the knob, 70 80 90 100 100 (I did not mistype that, 100
100) 110 LINE 120 130

At the bottom left hand corner there is a toggle switch for ON OFF.In
the middle above the metal plate with the knob there is a meter/gauge
which says VOLTS A.C. 0 30 60 90 120 150.At the top right hand corner of
the device there is a round plug socket.
There is a handle mounted on top of the device.
I plugged it into a wall outlet.I think it works A OK.Of course it is
A.C.Voltage only. *
cuhulin

Sounds like a Variac...a big rheostat or something. With some
testing, you could probably bring old tube rigs back to life slowly
(warm up and reform the capacitors...)

bpnjensen wrote:


Sounds like a Variac...a big rheostat or something. With some
testing, you could probably bring old tube rigs back to life slowly
(warm up and reform the capacitors...)

Not a rheostat, an autotransformer with a wiper.

On Feb 17, 11:26*pm, wrote:
I have an old power supply thingy here, I bought it at a Goodwill store
a bunch of years ago.I am looking it over right now.It says on the metal
plate on the front,,,

Acme ACME Electric Corporation CUBA, NEW YORK VOLTROL MADE IN U.S.A.
TYPE T-8350 INPUT 115 VOLTS 50-60 CY. OUTPUT 6 AMP MAX.PATENTS NO'S
2009013 2061452

The device is HEAVY!, must have a HEAVY coil inside, I reckon.There is a
large round knob with a metal pointer underneath the knob and around the
perimeter of the knob, 70 80 90 100 100 (I did not mistype that, 100
100) 110 LINE 120 130

At the bottom left hand corner there is a toggle switch for ON OFF.In
the middle above the metal plate with the knob there is a meter/gauge
which says VOLTS A.C. 0 30 60 90 120 150.At the top right hand corner of
the device there is a round plug socket.
There is a handle mounted on top of the device.
I plugged it into a wall outlet.I think it works A OK.Of course it is
A.C.Voltage only. *
cuhulin

It is known as a 'Variac', may I interject.

On Feb 17, 8:24*am, dave wrote:
wrote:
Some very sucessful high end audio
designs implement a separate power supply for EACH stage . And none of
them seem to favor switchers!

They probably don't have to buy their own electricity. *If I was still
using my 2 [ea] 9 Amp linear supplies my electric bill would be $100 a
month higher. *I got the switcher to save energy. *The fact that it is
tiny, quiet, and cool is all gravy.

There's an electric motor at a quarry, over a mile away, that has some
sparky brushes. *I can tell when they turn it on and off. *This is a
very quiet (QRM) spot.

The same audio designs usually implement class A in the power
output stages, so obviously they are not concerned about efficiency
and electric bills. They don't sound too bad, untill one looks at
their prices...

wrote:


The same audio designs usually implement class A in the power
output stages, so obviously they are not concerned about efficiency
and electric bills. They don't sound too bad, untill one looks at
their prices...

I do high-end pro audio. We have 1 RU amplifiers that produce 10,000
Watts each. They are decidedly not Class A.

On Feb 18, 8:36*am, dave wrote:
wrote:

* * * * The same audio designs usually implement class A in the power
output stages, so obviously they are not concerned about efficiency
and electric bills. They don't sound too bad, untill one looks at
their prices...

I do high-end pro audio. *We have 1 RU amplifiers that produce 10,000
Watts each. *They are decidedly not Class A I certainly wouldn't expect 1RU amps to be a true class A. Even at a 100 Watt into 8 Ohm load. What make is the one you are dealing with, Dave? Are they mosfets in the output stage or something different; the ones I was referring to are those overpriced consumer grade "audio-sucker" monoblocks, and usually weigh at least a 100 lbs and up. Talk about linear power supplies,good heavens... Heat sinks alone are almost as big as my house cast iron steam radiator!