1987 50 watt Lead Series

[Glitch6555]

I’m having a Terrible issue with my 1987 50 watt head. I normally turn the power on and leave it in standby for 30 minutes before I start using it. I turn the standby off, and after a while it just hums so loud you must turn it off ASAP! I’ve tried to run my guitar straight to the head when this happens, but makes no difference. I just turn it off and wait for it to cool down and then it’s the same thing. My real problem is I don’t know who to send it to for repair? I’ve took the back panel off and everything looks fine. I’m in Hickory , NC. Would any of you guys have any suggestions?

 

[Rodical]

Google your local area for a repair person or store...

 

[Glitch6555]

Google your local area for a repair person or store...

I have a hard time trusting people I don’t know. Need someone who will recommend someone?

 

[Trouble Free]

It's almost always a tube issue, if you don't have spares it would be good to get some.

 

[LyseFar]

It is a 2205 not a 1987…unless 1987 is the build year…
But yes probably a bad power tube. Or the reverb tank … bad connection. Try cleaning the reverb tank connectors.

 

[Deftone]

I disconnected the reverb on my 2205, too noisy.

 

[fitz]

I normally turn the power on and leave it in standby for 30 minutes before I start using it.

Why?
The amp only needs a few minutes at the most to reach operating voltages.

I’ve took the back panel off and everything looks fine.

Tubes can look fine and not function properly.
I'd try some known good tubes before you start dropping coin on a tech.

 

[marshallmellowed]

I’m having a Terrible issue with my 1987 50 watt head. I normally turn the power on and leave it in standby for 30 minutes before I start using it. I turn the standby off, and after a while it just hums so loud you must turn it off ASAP! I’ve tried to run my guitar straight to the head when this happens, but makes no difference. I just turn it off and wait for it to cool down and then it’s the same thing. My real problem is I don’t know who to send it to for repair? I’ve took the back panel off and everything looks fine. I’m in Hickory , NC. Would any of you guys have any suggestions?

I agree that is sounds like it's possibly a power tube. Look in the back when it starts humming, see if either power tube is glowing brighter or red-plating.