Ampeg SVT 7 Rev

[Blues Marvel]

Hi All Ampeg Lovers,

What Rev level did Ampeg get the chip issue fixed on the SVT 7 amp?

What were the Rev modifications?

Please if you have not owned one and are looking to impart your professional opinion don't.

 

[Shlabotnik]

I updated my board to Rev H to fix my issue. Not sure if there were versions before that that were also unaffected by the problem.

 

[ugly_bassplayer]

Are these things still blowing up???
This is ridiculous.....that piece of #+$+$$+$ of an amp forced me to sell a bass to get a new head just before a 5 gig stretch a few years back.

 

[Blues Marvel]

I updated my board to Rev H to fix my issue. Not sure if there were versions before that that were also unaffected by the problem.

Thank you for the reply!

What was your issue?
What Rev was your head originally?
Has yours been fine since?

This head is a Rev C00.

I'm trying to decide which direction to go on this thing before making any moves.

 

[Blues Marvel]

Are these things still blowing up???

Apparently yes.

 

[ugly_bassplayer]

Apparently yes.

Ya, I like old pre buy out ampeg. New buy out ampeg imo owes me a new amp and a Fender Mustang that I sold because of the 7 pro. Piece of @##($+$.

My old svt 4 pro is a tank.

 

[Shlabotnik]

Thank you for the reply!

What was your issue?
What Rev was your head originally?
Has yours been fine since?

This head is a Rev C00.

I'm trying to decide which direction to go on this thing before making any moves.

I’m pretty sure mine was a C00 originally as well. I had bought it as a refurbished model a few years ago and about a year and a half ago I started having problems where it would spontaneously shut off. I ordered a new board (rev H) and installed it myself and have not had a problem since. I love this amp now that I’ve upgraded the board!

 

[Shlabotnik]

This is the replacement part I bought that fixed everything for me.
Invalid Link Removed

 

[JimmyM]

Thank you for the reply!

What was your issue?
What Rev was your head originally?
Has yours been fine since?

This head is a Rev C00.

I'm trying to decide which direction to go on this thing before making any moves.

The amp will still say Rev C, but you have to pop the lid and check the main board itself. Rev H is supposed to be the rev that they fixed it.

 

[Blues Marvel]

The amp will still say Rev C, but you have to pop the lid and check the main board itself. Rev H is supposed to be the rev that they fixed it.

Are you saying there are no Revs past C?

 

[JimmyM]

Are you saying there are no Revs past C?

I am saying that on the amp outer chassis itself, the highest rev I've seen on it is C, and on the main board, the highest rev I've seen is H.

 

[Blues Marvel]

I am saying that on the amp outer chassis itself, the highest rev I've seen on it is C, and on the main board, the highest rev I've seen is H.

Interesting so I may can tell (by looking) if the board has been changed?

 

[Blues Marvel]

This is the replacement part I bought that fixed everything for me.
Invalid Link Removed

Cool it says not available everywhere I have searched on the net.

 

[MultiScaleMale]

8 revs seems like a lot.

EDIT: I had an SVT-7 PRO and never had any issues. If they ever do it again, I'd pay $300-400 more or so if the components were built robustly. Ampeg tone in a reasonable weight with reliability? Yes, please.

 

[Blues Marvel]

I am saying that on the amp outer chassis itself, the highest rev I've seen on it is C, and on the main board, the highest rev I've seen is H.

How can I get parts for these Jimmy? Looks like the internet says "out of stock". Is that a Yamaha thing?

 

[Shlabotnik]

Cool it says not available everywhere I have searched on the net.

I had to call Full Compass on the phone and talk to a rep. They ordered one for me from Ampeg. They said it would take a while but it came rather quickly. Give them a call and see if they can help you out.

 

[thetragichero]

they've got a lot of stuff available that i couldn't find on the site, and they're more than happy to search through it to get what you need

 

[Flatwound]

I got a Rev. H board from britishaudio.com. The only reason I bought from them is that they responded more quickly to my email. If Full Compass had responded first, I probably would have bought it from them. I paid for shipping, and probably would have gotten free shipping from Full Compass, but I have no regrets.

I got my SVT-7 Pro used, knowing it had a problem, so replacing the board didn’t bother me.

 

[Nevada Pete]

Here is the link to the TalkBass thread where the tech from Australia who originally discovered the problem with the aux power supply controller chip tells all:

Ampeg SVT-7 Pro - Reliability?

Start with message #65. It looks like the photographs are gone now. I'll PM them to you if you want. Note that the guy originally cites the wrong designation number for the chip in question, and made an additional post to correct his error a few messages down the thread.

My SVT7-Pro literally exploded internally when the aux power supply controller chip died. Roy Page here in Las Vegas replaced the mother board with a Rev H under warranty, and the amp is now rock solid and sounds typically beautiful. Tons of soup on the bottom where you need it, even with my Fender American Standard Precision 5 string.

Just to make sure, I also attached a little heat sink directly to the top of the aux power supply controller chip. I wouldn't recommend attempting this yourself unless you have experience on the bench. You must use the proper heat conductive / electrically non-conductive cement, and there's not much room on the board where that chip is. The heat sink certainly isn't mandatory. I just stuck it on there because I can, and because even the correct chip reportedly tends to run a little hot (still completely within spec, though). Good luck with your SVT7-Pro. I'm keeping mine.

 

[TonH]

Cool it says not available everywhere I have searched on the net.

Maybe here?
SVT-7 PRO

Maybe you can just order the chip. There is a manual/instructions on that website how to replace the chip.