1970s Ampeg SVT

[polymorphorism]

SVT's don't have chokes.



Modern caps are better.



There is no benefit to this unless you like noise.

The OP has a less than zero chance of completing his stated task. If he is wise, he has turned his attention back to video games. Thankfully, the power transformer which poses the biggest hazard, is the hardest part to get. Without it, he can't do too much damage. IMO, the original post was a passing adolescent fantasy and is best left that way.

in order:

True

True

Not necessarily - in some limited cases the signal path can be positively affected by the difference in non-linearity of carbon comp vs. carbon film vs. metal film.

True - and LMAO at the video game comment!

 

[mikgag]

future Darwin Award?

 

[JimmyM]

OK, let's see if we can turn this thread into something constructive. If you want to learn amp building, you have to start somewhere. Certainly you don't start with an SVT, so what would you start with?

 

[JGR]

OK, let's see if we can turn this thread into something constructive. If you want to learn amp building, you have to start somewhere. Certainly you don't start with an SVT, so what would you start with?

buy a simple kit from weber, allenamps, metroamp, etc. and go from there.

 

[BillyB_from_LZ]

OK, let's see if we can turn this thread into something constructive. If you want to learn amp building, you have to start somewhere. Certainly you don't start with an SVT, so what would you start with?

Well done JimmyM!! And JGR's response too!

 

[theshadow2001]

OK, let's see if we can turn this thread into something constructive. If you want to learn amp building, you have to start somewhere. Certainly you don't start with an SVT, so what would you start with?

well i thought i made a few good suggestions

 

[JimmyM]

well i thought i made a few good suggestions

I just didn't want to read the whole thread

 

[MisterT]

Hi,
To any and all Ampeg SVT "Original" amp lovers and users!
I have played bass since 1964.
I had a 76 SVT or 77', white rocker switches in the last 70's. Sold it and i have kicked myself ever since.
I now have another one I am restoring.
The BEST place for a schematic, bar none, is kbaps.com
They have original schematics and parts lists and several other pages of Ampeg SVT papers like user manual, etc.
Not the Joe Piazza schematics...those are not good!
For a very reasonable cost you can download and print them..

What I am needing to find is a wiring diagram of the power amp. I want to really look at the wire colors or layout of an original with 6550's, well the one with 6146's is identical, circuit wise.
If anyone has theirs opened and willing to send me a color pic or email me and I will
call you, my dime and ask you what it shows in there.
I can go by the schematic but i am stumped on a couple of wire hookups.
About 2 years ago I did a cap and resistor change/mod with help from Nashville Amplifier so my wiring layout is a little different looking.
I made a mistake the other day and I really need to see or talk to someone who has one...I know I should have drawn it out but I didn't.... my bad! By the way Nashville Amplifier Service is a great bunch of folks and really know the SVT. They have what I need but I don't want to take up their time on the phone figuring this wiring out. I live in the metro OKC area in Oklahoma and would go out there, but really can't afford it right now.
If there is anything else I can help anyone with feel free to email me:"[email protected]".
My name is Ron Thomas and I hope to hear from someone.
Thanks for reading
mistert

 

[JimmyM]

Since when are the Joe Piazza schematics inaccurate? Where did you hear that? I've heard nothing of the sort.

 

[sedan_dad]

I've heard the same comment from my tech also.
I can't give you the details but I was told they're incomplete.



BTW I just scored a set of GE 6146 JAN's for the beast.

 

[MAMMOTHvolume]

I am going to start making one shortly, although it wont be an actual 1970s since I'm doing it from scratch, I will be following the schematics of one.

I beg of you to not bring me down by telling me that it is too difficult or anything like that, I have professional help lined up.

What I need to know is EVERY part that I need. Remember, I said part, not tool. So could someone give me a list of all of the parts that I need and the info I need about them so I can start buying the parts.

The schematics I will be following are...

Invalid Link Removed
for the pre-amp

and

Invalid Link Removed
for the power-amp

Once again, Please give me a list of EVERYTHING, even switches, resistors, you get the idea.

Thank you all for your help ahead of time!

sorry dude i'm gonna have to put you down and say don't attempt this it's not worth killing yourself svt's have alot of current and voltage going on and will be very lethal! unless you have your proffesional help with you all the time, try and do something alot simpler first to build up your knowledge.

 

[MAMMOTHvolume]

OK, let's see if we can turn this thread into something constructive. If you want to learn amp building, you have to start somewhere. Certainly you don't start with an SVT, so what would you start with?

try out a smaller 5watter single ended head, great for tweaking and learning the basics and also no where near as lethal!

 

[blockinlay]

I'm sure it can be done. I'd recommend you look for a complete basket case amp. If you didn't want to rebuild, at least use it as a guide, and for parts.

 

[KPAX]

If you knew what you were doing, it would get down to the transformers. I don't know if Ampeg sells them separate. If not, you could scrounge for some (and pay several hundreds) or buy some close ones from Hammond Manufacturing (and pay several hundreds).
But you sound like you don't even know about wire gauge, much less how the circuits work, sources for hardware, how to lay out circuit boards, etc.
You must be high or manic.
Forget it.