Help please. 1M resistor on Marshall inputs? Mine was 2 m

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tone?
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Help please. 1M resistor on Marshall inputs? Mine was 2 m

Post by tone? » Mon Dec 22, 2014 10:10 pm

I was looking at the resistor on the high input of my Marshall 2204.
Mine is 2 megs.
I changed it out for a 1 meg.
does it matter??


something seemed weird so i put in the old carbon comp of 2 meg back in there.

Joshabr1
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Re: Help please. 1M resistor on Marshall inputs? Mine was 2

Post by Joshabr1 » Mon Dec 29, 2014 9:48 pm

Schematics will show u if nobody wants to jump in here.

tone?
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Re: Help please. 1M resistor on Marshall inputs? Mine was 2

Post by tone? » Tue Dec 30, 2014 6:35 pm

thanks for responding man.

Not many like newbies here.

I just put the 2meg resistor back in there and it sounds fine.

Joshabr1
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Re: Help please. 1M resistor on Marshall inputs? Mine was 2

Post by Joshabr1 » Fri Jan 02, 2015 7:45 pm

It can be kinda like pulling teeth to get responces here But if u ever get it its useful.

Haze13
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Re: Help please. 1M resistor on Marshall inputs? Mine was 2

Post by Haze13 » Sat Jan 03, 2015 12:13 pm

This resistor sets the grid voltage off-set on the tube and it pulls to the ground any current that present on the grid while tube is working. Since it's connected to the grid, there is no voltage drop on across it. There is no precise value to that resistor, but there is min and max values in the datasheet. It suppose to be large. 1M or 2M are fine, so both values work the same in this position.

tone?
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Re: Help please. 1M resistor on Marshall inputs? Mine was 2

Post by tone? » Sun Jan 04, 2015 12:41 am

Haze13 wrote:This resistor sets the grid voltage off-set on the tube and it pulls to the ground any current that present on the grid while tube is working. Since it's connected to the grid, there is no voltage drop on across it. There is no precise value to that resistor, but there is min and max values in the datasheet. It suppose to be large. 1M or 2M are fine, so both values work the same in this position.

Thanks bro.

I changed the resistor back to what it was and its all good.

Thanks for the feedback!

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