Marshall Haze MHZ15 Bias Clarification

[pong]

pls down load that link that is the marshall haze 15 watts schematic pls help me to read it and where the bias probe locate http://music-electronics-forum.com/a...hall-mhz15.pdf thanks jazz pls help me

[Enzo]

Oh dear, three times...

The test point is across a 1 ohm resistor, so 19mv = 19ma.

[oc disorder]

Gee Pong don't post around the place too much ...it might make a bad smell !!!
The guys will answer when they have time ..the're trying to make a living most of the time....
Use the search engine up top left to search for some of the terms you are unfamiliar with. Theres a lot of good reading hidden away here.
I just knocked up a simplified diagram of the haze bias circuit.
I'ts not common in most guitar amps to have individual bias adjustment on each output tube like this has.
Do some reading on ohms law ... As it uses a one ohm resistor it so happens that when you read millivolts from your meter it is also the amperage in milliamps not to be confused with milli vanilli.....! Ohms law says I=E/R and if you divide or multiply a number by 1 the number stays the same.
So lets say you measure 15 millivolts on your meter (set to voltage reading) thats E
so divide by 1 to change it to milli amps and hey presto ...15ma !!!!!!
Current flow cannot be read by a meter normally unless you break the circuit and insert it (the meter) to see how much is passing through.
Think of a garden hose you could measure the pressure at one end (how much it presses into a diaphram for example) but not the flow through the hose unless you cut it
and put a mini windmill in there to see how fast its flowing through.
By using the resistor and ohms law we can see how much pressure is going through.
There's lots on the web about all this if you want to go looking

[J M Fahey]

Oh dear, three times...

Well, not exactly.
He asked (the exact same question) three times ... here , at 5:53, 5:56 and 5:57 AM.
but given you incredibly callous lack of response, he also placed the same question in http://music-electronics-forum.com/t16338/ at 6:03 AM. (you should excuse him, he lost some time searching *where* to find you).
So make it four times.
Oh well.
You got it light.
On the other thread JazzPBass answered him and got 6 or 8 questions in so many minutes.
So much so that OCDisorder had to answer

Gee Pong don't post around the place too much ...it might make a bad smell !!!
The guys will answer when they have time ..the're trying to make a living most of the time....

Oh well [2]

[pong]

Oh dear, three times...

The test point is across a 1 ohm resistor, so 19mv = 19ma.

sorry enzo ^_^

[Enzo]

Pong, welcome to the forum, we are glad you are here.

Just a suggestion, most members would prefer one post at a time.

Have we given you the information you need?

[pong]

Gee Pong don't post around the place too much ...it might make a bad smell !!!
The guys will answer when they have time ..the're trying to make a living most of the time....
Use the search engine up top left to search for some of the terms you are unfamiliar with. Theres a lot of good reading hidden away here.
I just knocked up a simplified diagram of the haze bias circuit.
I'ts not common in most guitar amps to have individual bias adjustment on each output tube like this has.
Do some reading on ohms law ... As it uses a one ohm resistor it so happens that when you read millivolts from your meter it is also the amperage in milliamps not to be confused with milli vanilli.....! Ohms law says I=E/R and if you divide or multiply a number by 1 the number stays the same.
So lets say you measure 15 millivolts on your meter (set to voltage reading) thats E
so divide by 1 to change it to milli amps and hey presto ...15ma !!!!!!
Current flow cannot be read by a meter normally unless you break the circuit and insert it (the meter) to see how much is passing through.
Think of a garden hose you could measure the pressure at one end (how much it presses into a diaphram for example) but not the flow through the hose unless you cut it
and put a mini windmill in there to see how fast its flowing through.
By using the resistor and ohms law we can see how much pressure is going through.
There's lots on the web about all this if you want to go looking

thanks oc order sorry for that...yup i bias already my haze 15 i set in 19mV each tube.........and thers a 2 trimpot right for each tube its locate in v10 v11......thanks for the info......now i know mV equates mA as long you have 1 ohm resistor............that why before im rilly confused cuz they are telling 19mV and 19mA but the problem they are not explaining the whole thoery eheheh but anyway thanks to you guys.......cheers