bias question power?bad

[the crush 36]

i played a outside show dont think the power was all that great my rm 100 was sounding weird i checked the bias and it was way lower than normal so when playing somewhere that has bad power can you just turn the bias up i think mine was set at 44 and at the show it was like 20 checked it when i got home and was back to normal where it was before and sounding good could i have turned up the bias without hurting the amp at the show ??? thanks

 

[kc2eeb]

When you measured the bias at the outdoor show and it showed 20 ma.
the next thing you should have measured is the line voltage. Was the power being supplied by a generator?
44ma to 20ma is a BIG difference. The AC line voltage was probably
under 100 volts. If you readjusted the bias to 44ma and the power suddenly
surged to 110-120 volts........not good.
It's usually not a good idea to used a generator to power an amplifier unless you can verify that it's putting out 115-120 volts of regulated, pure sine wave AC.
A good power conditioner would be a good idea for that kind of gig.

 

[Daryl]

When you measured the bias at the outdoor show and it showed 20 ma.
the next thing you should have measured is the line voltage. Was the power being supplied by a generator?
44ma to 20ma is a BIG difference. The AC line voltage was probably
under 100 volts. If you readjusted the bias to 44ma and the power suddenly
surged to 110-120 volts........not good.
It's usually not a good idea to used a generator to power an amplifier unless you can verify that it's putting out 115-120 volts of regulated, pure sine wave AC.
A good power conditioner would be a good idea for that kind of gig.

Very well stated...
Here is what I use. check out the specs:
http://www.carvinguitars.com/products/single.php?product=AC120S&cid=61
It's a great unit at a great price point, that is over-engineered and made right here is the USA.
Most importantly, it has a readout that lets you know what the line voltage is in realtime. Simple and effective.

 

[Groff]

When you measured the bias at the outdoor show and it showed 20 ma.
the next thing you should have measured is the line voltage. Was the power being supplied by a generator?
44ma to 20ma is a BIG difference. The AC line voltage was probably
under 100 volts. If you readjusted the bias to 44ma and the power suddenly
surged to 110-120 volts........not good.
It's usually not a good idea to used a generator to power an amplifier unless you can verify that it's putting out 115-120 volts of regulated, pure sine wave AC.
A good power conditioner would be a good idea for that kind of gig.

Very well stated...
Here is what I use. check out the specs:
http://www.carvinguitars.com/products/single.php?product=AC120S&cid=61
It's a great unit at a great price point, that is over-engineered and made right here is the USA.
Most importantly, it has a readout that lets you know what the line voltage is in realtime. Simple and effective.

I came into this thread looking to help, but...
Well I think you just chose which power conditioner i'm gonna buy :lol: I was looking for one and had no idea this one existed, and the price is nice!

 

[nomad100]

Any affordable voltage regulators?

 

[Daryl]

[
Here is what I use. check out the specs:
http://www.carvinguitars.com/products/single.php?product=AC120S&cid=61
It's a great unit at a great price point, that is over-engineered and made right here is the USA.
Most importantly, it has a readout that lets you know what the line voltage is in realtime. Simple and effective.

I came into this thread looking to help, but...
Well I think you just chose which power conditioner i'm gonna buy :lol: I was looking for one and had no idea this one existed, and the price is nice![/quote]


It's built like a freaking tank too. You are going to dig it. The sequential power up is a cool feature too. If you set it up right, you won't get that pop sound in your speaker cab when you turn it on.