strange standby hum ?

  • Thread starter Thread starter crankyrayhanky
  • Start date Start date
crankyrayhanky

crankyrayhanky

Well-known member
I have a new OR100
When on standby, there is a very very quiet hum that is coming through the cab speakers. Very odd; I do not have tech skills but I have played tube amps for 30 years and never encountered such a thing. I hope this is normal for OR100 (?); the amp sounds FANTASTIC and I have no wish to return.

Any insight appreciated!
 
i would agree normal for a lot of amps

try turning up the amp without a cable usually wont hum any more.
 
crankyrayhanky":cafj2ok1 said:
I have a new OR100
When on standby, there is a very very quiet hum that is coming through the cab speakers. Very odd; I do not have tech skills but I have played tube amps for 30 years and never encountered such a thing. I hope this is normal for OR100 (?); the amp sounds FANTASTIC and I have no wish to return.

Any insight appreciated!
Click to expand...
It's caused by electromagnetic coupling between the transformers. If it's a squared base, turn the PT 90 degrees. You can also try moving the related wiring, but be very careful doing it! Keep one hand behind your back, and use a non-conductive wand to move the wires.

Orange amps are made by the same company that made Cornford amplifiers. I will assume they are sourcing their iron from the same company, so you could contact them. The Marshall JTM45 reissues did the same thing... Rotating the PT was the fix.
 
Not that my amp hums....but the routing and, more specifically, the lingering of power thoughout the circuitry after the amp has gone from ON to STANDBY, and then from ON to OFF has my curiosities up.

My Valvestorm holds (im speculating) a lot of power after I go from on to off on the power side. Example: playing and holding chord and switch to standby amp sings, then hit the off switch and gets a bit louder and continues to sing for quite a while before fizzling out. My 5153 doesn't do this. What causes the circuitry to linger, first off and secondly what causes the difference between the two?

Just curious.
 
MrDowntown":2kej1qig said:
Not that my amp hums....but the routing and, more specifically, the lingering of power thoughout the circuitry after the amp has gone from ON to STANDBY, and then from ON to OFF has my curiosities up.

My Valvestorm holds (im speculating) a lot of power after I go from on to off on the power side. Example: playing and holding chord and switch to standby amp sings, then hit the off switch and gets a bit louder and continues to sing for quite a while before fizzling out. My 5153 doesn't do this. What causes the circuitry to linger, first off and secondly what causes the difference between the two?

Just curious.
Click to expand...
If I'm understanding you correctly, what you're hearing is draining of the capacitors.
 
TrueTone500":3dyxlrg2 said:
MrDowntown":3dyxlrg2 said:
Not that my amp hums....but the routing and, more specifically, the lingering of power thoughout the circuitry after the amp has gone from ON to STANDBY, and then from ON to OFF has my curiosities up.

My Valvestorm holds (im speculating) a lot of power after I go from on to off on the power side. Example: playing and holding chord and switch to standby amp sings, then hit the off switch and gets a bit louder and continues to sing for quite a while before fizzling out. My 5153 doesn't do this. What causes the circuitry to linger, first off and secondly what causes the difference between the two?

Just curious.
Click to expand...
If I'm understanding you correctly, what you're hearing is draining of the capacitors.
Click to expand...

Yes, In effect, the residual noise an amp makes when being switch to standby, and then switched to off. Seems I've read about the capacitors draining before.
 
Not to hijack the thread, but is Cornford out of business now? I haven't been paying attention much lately, so I seem to have missed that. I always liked the sound Guthire Govan got out of his Cornford amps.

Oh, and post some clips of the OR100! I dig Orange amps. Congrats on the new gear
 
Orange tech email reply:
The last thing we want is for you to risk your life tinkering with your OR100. There is enough residual electricity inside your amp to cause serious harm to you. So please, don’t work on anything without taking it to an authorized certified Orange tech shop.

As to the quiet hum that you hear, that is completely normal. You are hearing the hum of 2 massive transformers. It should be ever so slight. That is common in all high watt amplifiers. I personally own 4 amps and they all do that.

Now, if you are hearing mild to loud static, that is a different story. That could mean you have a faulty switch or a tube issue. If it is just the low hum, you’re ok.
Click to expand...
 
crankyrayhanky":lce8wumq said:
Orange tech email reply:
The last thing we want is for you to risk your life tinkering with your OR100. There is enough residual electricity inside your amp to cause serious harm to you. So please, don’t work on anything without taking it to an authorized certified Orange tech shop.

As to the quiet hum that you hear, that is completely normal. You are hearing the hum of 2 massive transformers. It should be ever so slight. That is common in all high watt amplifiers. I personally own 4 amps and they all do that.

Now, if you are hearing mild to loud static, that is a different story. That could mean you have a faulty switch or a tube issue. If it is just the low hum, you’re ok.
Click to expand...
Click to expand...
I'm curious... What do you think about the reply from Orange?
 
IDK, but I do feel a little less confident after reading your reply :confused:
 
crankyrayhanky":3kw70c5k said:
IDK, but I do feel a little less confident after reading your reply :confused:
Click to expand...
If the hum isn't bad, don't sweat it. Can you hear it while you're playing? If not, then you're good to go. Even if you can hear a bit while you're playing, some would consider it a bonus! I had a '72 Marshall Super Lead with a bit of hum, and I wouldn't have changed it for anything. I love Vox AC30 amplifiers, which nearly all have an inherent hum... Wouldn't gig an AC30 without it. :)
 
raz311":2c24lg0u said:
TrueTone500":2c24lg0u said:
CaseyCor":2c24lg0u said:
Not to hijack the thread, but is Cornford out of business now?
Click to expand...

Yes.
Click to expand...

Aren't they called Victory now? Or is that run by different people?
Click to expand...
Yes, but they aren't the same amplifiers, per se... I've never played a Victory, but if they are as bass/treble heavy as the MK50 and RK100, I'll pass. I had to modify my RK to lessen bottom-end gain, and bump the midrange.

Cornford sent a couple of amplifiers to Bat Cat for a proposed partnership... Bad Cat apparently passed on the offer.
 
You must log in or register to reply here.
Back
Top