Hartke HA3500 problem???????

[schecter5string]

Last night a band rehearsal my amp started to cut out. It would reduce in volume, almost to nothing, stay like that for a 1-2 minutes then come back to life.
Here is my signal chain last night: Schecter bass(active)>Sansamp BBDI>HA3500>Hartke HX410
This started the first few minutes of practice,(as I was warming up) here is a list of what I did.
At first I thought it was the power strip so I plugged into a different outlet, the amp worked for a couple of songs then started to cut out again. At this point I checked the fan and touched the top of the case all was good.
Next I turned off the tube pre and just ran the SS pre, same problem, it worked for a couple songs then started to "lose power" then come back to life.
So next I removed the Sansamp and ran straight into the head, same problem as above.
The head I bought new about 1.5 years ago, the cab is new, about 2 months old, the bass is a 06 model, and the Sansamp is one of the original models. The Sansamp was plugged into the front of the amp.
What do I try now????, will a bad tube in the pre cause this, even though I turned it off at one point?
I'm at a loss here, I'm afraid my amp is, crapping out on me.
Anyone????? Larry?????? help!!!!!!!!!

 

[Larry Hartke]

Hey schecter5string,

I'm not sure from here what is causing your 3500 to lose power, but no worries we'll get it right for you. Just give my service manager Joe Antonelli a call tomorrow (he's not in today) and he'll tell you what to do. If you need further help I'm right here 201-680-8153 Cell and [email protected]

Thanks for playing Hartke!

 

[schecter5string]

Thanks Larry,
35 minutes to reply to my SOS
I do love my Hartke gear, But I think I love your CS better!!!!!

 

[TinIndian]

Absoloutely, I love my HyDrive 410! My brother-in-law has one he loves too. Excellent customer service on the only occasion I had to call about.

Keep up the good work Larry!

 

[David Jayne]

Larry, for the win, as usual. (applause).

 

[bryan gibson]

Didja check the bass batteries?

 

[schecter5string]

Didja check the bass batteries?

when the batteries in my bass start to go bad I get a distortion, not a loss of volume, I have been playing my bass today through my practice rig, defiantly not the batteries.

 

[TinIndian]

when the batteries in my bass start to go bad I get a distortion, not a loss of volume, I have been playing my bass today through my practice rig, defiantly not the batteries.

+1 mine acts the same. Lots of distortion.

 

[RickenBoogie]

Just FYI, this symptom usually means dirty effects loop jacks. Try running a plug in and out several times in both the send and return, and if possible use De-Oxit contact cleaner.

 

[schecter5string]

Just FYI, this symptom usually means dirty effects loop jacks. Try running a plug in and out several times in both the send and return, and if possible use De-Oxit contact cleaner.

ok this is what I have done today, cleaned the FX loop, pulled the pre tube and reseated it, looked under the hood for anything that jumps out at me.
I don't have a cab here at home so I have been playing for about a 1/2 hour using the effects send as a headphone input, no problems at all. So maybe it was the FX loop? When I'm plugged into the FX loop it bypasses the EQ, LPF, HPF, and the master volume, so I know that both Pre's are good, that just leaves the power amp, or dirty FX loop like RickenBoogie stated.