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Ampeg SVT 7 Pro Club

#2,602
The 7Pro I bought new in 2010 or 2011 went pop today after cutting out repeatedly. Looking back through this forum, I guess there's a known issue with an IC on the main board. My main board is rev B (the amp is rev A01) so perhaps I'm lucky it lasted this long!

I have the skills and equipment to replace components, but probably not to diagnose which components need replacing. Per the photo, the chip obviously does. But I don't know whether the revisions that designed out the problem changed more than the chip, nor even whether the latest rev main board is a direct replacement for rev B.

I'd be interested to know whether there's a detailed description of the known issue anywhere, and I'd welcome advice on which repair options are worth pursuing, from the (apparently) many who have gone before me.

20230704_221220.jpg
 
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#2,603
Andy_R said:
The 7Pro I bought new in 2010 or 2011 went pop today after cutting out repeatedly. Looking back through this forum, I guess there's a known issue with an IC on the main board. My main board is rev B (the amp is rev A01) so perhaps I'm lucky it lasted this long!

I have the skills and equipment to replace components, but probably not to diagnose which components need replacing. Per the photo, the chip obviously does. But I don't know whether the revisions that designed out the problem changed more than the chip, nor even whether the latest rev main board is a direct replacement for rev B.

I'd be interested to know whether there's a detailed description of the known issue anywhere, and I'd welcome advice on which repair options are worth pursuing, from the (apparently) many who have gone before me.

View attachment 5115130
Click to expand...
I would strongly advise you to bring it to a skilled technician.
While we can definitely see the issue there might be other components impacted.
 
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#2,606
I’ve a Heritage 810e on the way to pair with my 7-Pro. I’m pretty stoked so I wanted to share though, it was due to a very trusty cabinet finally giving out on me. I used an SWR Goliath Jr 2x10 (8ohm) and Big Bertha 1x15 for a long time together then started leaving the 1x15 at home cause the bandmates had a Hartke 4x10 that I used with the 2x10….

Welp, the 2x10 finally died and the Hartke never really impressed me but, it moved air. Much like TalkBass, my bandmates instigated my GAS and now the fridge is en route.

Also, before all that, I bought a really nice Mesa amp which was somewhat similar in options to the 7-Pro. I tried it for a few months and the extras that the 7-Pro didn’t have were nice but, I just wasn’t feeling it like I hoped I would.

I brought the Ampeg back in and it felt like coming home to your favorite meal. All the bandmates were floored at how well it brought the oomph back and sit just right in the mix. Can’t wait to hear it with the fridge plugged in.

Anyways, just wanted to gloat a little about getting my dream cab and praise the Ampeg. Cheers y’all!
 
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#2,611
xI Jonathan Ix said:
I’ve a Heritage 810e on the way to pair with my 7-Pro. I’m pretty stoked so I wanted to share though, it was due to a very trusty cabinet finally giving out on me. I used an SWR Goliath Jr 2x10 (8ohm) and Big Bertha 1x15 for a long time together then started leaving the 1x15 at home cause the bandmates had a Hartke 4x10 that I used with the 2x10….

Welp, the 2x10 finally died and the Hartke never really impressed me but, it moved air. Much like TalkBass, my bandmates instigated my GAS and now the fridge is en route.

Also, before all that, I bought a really nice Mesa amp which was somewhat similar in options to the 7-Pro. I tried it for a few months and the extras that the 7-Pro didn’t have were nice but, I just wasn’t feeling it like I hoped I would.

I brought the Ampeg back in and it felt like coming home to your favorite meal. All the bandmates were floored at how well it brought the oomph back and sit just right in the mix. Can’t wait to hear it with the fridge plugged in.

Anyways, just wanted to gloat a little about getting my dream cab and praise the Ampeg. Cheers y’all!
Click to expand...

I have this rig and it really is awesome. I have 3 cabinets, but by far my favorite is the 810e.
 
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#2,612
Rodslinger said:
How many of y’all are running the 7Pro into an Ampeg SVT 212AV & how is it working out? I just put a brand new 7Pro in my stockade & want to pair it with the 212AV. Currently running it with the Genzler Magellan 212T which is nice but doesn’t get that Ampeg throat growl like the Ampeg 212AV does
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I don't see any problem with that combination. As long as you pay attention to the power you send to the 212.
I own a Genz Benz 212 Neox and plug my 7 pro in it for great reasults
 
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#2,616
pedulla1 said:
I bought it in year 2010. Late last year sent it to repair shop due to an intermittent scratchy sound. They replaced a part. It worked fine for a few weeks but I noticed the same symptoms recently.
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Open the case up and spray some Deoxit D5 into the little hole on each potentiometer housing for every knob, and turn the knob up and down a few times.

Every amp will run into dirty and scratchy pots at some point. It's worth a try.
 
#2,617
rzero said:
Open the case up and spray some Deoxit D5 into the little hole on each potentiometer housing for every knob, and turn the knob up and down a few times.

Every amp will run into dirty and scratchy pots at some point. It's worth a try.
Click to expand...
If you do this, use only the tiniest amount possible and keep it off the PCB.
 
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#2,618
rzero said:
Open the case up and spray some Deoxit D5 into the little hole on each potentiometer housing for every knob, and turn the knob up and down a few times.

Every amp will run into dirty and scratchy pots at some point. It's worth a try.
Click to expand...
I wouldn't do this.
Last time I did this on my Mesa Titan V12, after spaying some Deoxit on the pots, I ended up changing all the pots!
Some pots were slitghly noisy, in the end, all of them became unsusable.
 
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#2,619
baxter_x said:
I wouldn't do this.
Last time I did this on my Mesa Titan V12, after spaying some Deoxit on the pots, I ended up changing all the pots!
Some pots were slitghly noisy, in the end, all of them became unsusable.
Click to expand...
This is usually the case, even after using the industry favorite, Caig DeOxit. Using DeOxit may buy some time for the affected pot, but most likely, it will be best to just go ahead and replace that pot.
A former large-format console factory tech, now operating a well-known repair shop in Nashville and I were speculating on why some pots can be re-habilitated with DeOxit while others can’t. Thus fellow is leaps and bounds smarter than I and he was/is great with advice and help when I was maintaining (not necessarily servicing) several of those consoles in another life. We were thinking that not only does a pot get minute amounts of dust and other foreign substances inside that will affect its operation, but actually using the pot can damage the carbon traces inside from the wiper dragging across the carbon trace and causing damage that won’t be repaired by simply spraying it with DeOxit.
I have no earthly idea if this could be anywhere near accurate (Andy, feel free to debunk as needed!….:D), but the possibility makes it a good idea to just replace a wonky pot when it’s practical to do so.
I have the same notion about 1/4” output jacks where constantly connecting and disconnecting the cable can wear the plating from the jack contacts. I know, some guys have basses with 20+ year-old output jacks. All I can say there is, lucky you…:D
 
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#2,620
I appreciate the feedback on Deoxit. I personally have had nothing but success with the "D5" formula, but my experience is only on my basses and amps and those of a few friends.

I used to use "regular" contact cleaner with success, but learned here that I was stripping any factory lube from the pots and exposing them to more corrosion and malfunction down the line. My understanding is the "D5" formula includes lubrication. I've been told the ideal route would be to use regular contact cleaner and then add a lube (like the Dexoit "F5" perhaps?), but the D5-only route has been working for me.

I should add one crucial accessory for the operation is a sold-separately straw extension that is small enough to let the Dexoit actually get into the pot housing hole. And make sure you keep the can as upright as possible during use as I had one can lose its propellant when there was plenty of solution still left in the can.

deoxit straw extension.png


As always, and as indicated by those above, YMMV.
 
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