#1
So today, I was at practice and I saw that my Ohms switch was at 16. I usually play it at 8, so I tried to adjust it and noticed it was stuck. So I put a little effort into it, and when I got it to move, it was broken. It's still there but it doesn't do anything. Then when I turned on my amp, no sound was coming out of my amp. I checked my cab with another head so thats working fine. You can hear the low distortion coming out of the tubes, so they're fine. Everything lights up, it's just nothing is getting transferred to the cabinet. I'd appreciate some help cause' I have a show tomorrow and I'm really trying to get this fixed ASAP. So, help?
Quote by GrEgUms1991
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Quote by greasysnowball
or if you had a cell phone that was a Razr, you should give it to him
#2
You should never mismatch ohms with tube amps, you can blow your transformer which is expensive to replace. I hope thats not whats wrong with it.
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#3
If you mean, mismatch with the cabinet. I have a 5150 cabinet as well, so the cabinet can handle 4, 8 or 16. And the amp head wasn't on when I switched it.
Quote by GrEgUms1991
If some emo in a moshpit hit me i swear i would break him.

Quote by greasysnowball
or if you had a cell phone that was a Razr, you should give it to him
#4
Ok, so you never turned on the head while being mismatched with the cab correct? Sorry I'm abit confuzzled lol.
Agile AL3000
Douglas WRL90
SX SR1 STD Plus
J&D Strat
Squier Tele
Sammick TR2
Douglas Draco
Peavey JSX
Bugera V5
TWANGED VJ
#5
Quote by mikeEVH
So today, I was at practice and I saw that my Ohms switch was at 16. I usually play it at 8, so I tried to adjust it and noticed it was stuck. So I put a little effort into it, and when I got it to move, it was broken. It's still there but it doesn't do anything. Then when I turned on my amp, no sound was coming out of my amp. I checked my cab with another head so thats working fine. You can hear the low distortion coming out of the tubes, so they're fine. Everything lights up, it's just nothing is getting transferred to the cabinet. I'd appreciate some help cause' I have a show tomorrow and I'm really trying to get this fixed ASAP. So, help?
Find a different amp to use for this show. That switch needs to be replaced. I really doubt you'll find a tech who can do that for you same-day.
Meadows
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#6
the 5150 head and cab match at any setting though, the cab can handle up to 16 ohms, so i don't think it's possible or probable that that was the cause. i don't really know :/
Quote by GrEgUms1991
If some emo in a moshpit hit me i swear i would break him.

Quote by greasysnowball
or if you had a cell phone that was a Razr, you should give it to him
#7
Check the output jack from the head, It's possible it has a bad solder joint.
Also, check the switch as well.


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#8
If the cab can handle up to 16 ohms, its still not really safe to run the head at any different ohms.
Agile AL3000
Douglas WRL90
SX SR1 STD Plus
J&D Strat
Squier Tele
Sammick TR2
Douglas Draco
Peavey JSX
Bugera V5
TWANGED VJ
#9
Dude I would take this to a tech, it sounds like the switch is broken, which means you dont really know what the head is actually set to. You don't want to stuff around because that could lead to you blowing up your transformer which will be infinitely more expensive.

Borrow a head if you can :/
#10
Quote by Scowmoo
Check the output jack from the head, It's possible it has a bad solder joint.
Also, check the switch as well.
erm, I really don't think so.
Quote by mikeEVH
So today, I was at practice and I saw that my Ohms switch was at 16. I usually play it at 8, so I tried to adjust it and noticed it was stuck. So I put a little effort into it, and when I got it to move, it was broken. It's still there but it doesn't do anything.
...
Meadows
Quote by Jackal58
I release my inner liberal every morning when I take a shit.
Quote by SK8RDUDE411
I wont be like those jerks who dedicate their beliefs to logic and reaosn.
#11
I don't think it's the transformer. Cause when the cab isn't plugged in you can still hear the low distortion coming out. But I'm a newbie at this so correct me. I believe I have two transformers? Cause' I see one on the left and one to the right. So is there one for an input and an output?
Quote by GrEgUms1991
If some emo in a moshpit hit me i swear i would break him.

Quote by greasysnowball
or if you had a cell phone that was a Razr, you should give it to him
#13
Use a different amp for your show and take this amp to a tech to have the switch fixed.

Take SYK's advice, it's the only sound advice that's been given so far. I'm not saying that the other ideas couldn't be a problem, but you've already admited to busting the hell out the ohm switch on the amp. That being the case, you don't know how the switch broke. The contacts could have come loose or completely separated off the back of the switch or you could have severed the internal switch contacts (most likely) which would give no sound. There is no possible way to determine any of the other suggested problems without first getting the switch fixed.

STOP turning the amp on when it's not plugged into the cab. This applies to a broken or a working amplifier. This isn't an SS amp, you will screw it up if you continue to do this.

Nobody has made it clear to you yet about the matching issue, so I will take the liberty to do so. The fact that you have a 5150 cab and a 5150 amp isn't what we mean by matching. We mean matching the ohms. You're cab is wired to a specific ohm setting. This cannot be changed without opening up the cab and rewiring it or replaceing the speakers. I don't know what the cab's ohm rating is but for this topic lets assume its 8 ohms. You would then look at your amp and move the switch to the 8 ohms setting. You've admitted you are a newbie so it's not worthwhile at this point to go into all the technical details about what ohms are. Do the research if you want to know. For now, just know that with a tube amp, the settings switch on the amp MUST match the ohm rating on the back of the cab.
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Last edited by MeanwiththeDean at Nov 5, 2009,