Sansui 3000A New Driver Board - does anyone know more about this?

[EastPoint]

I ran across this thread about a new Sansui 3000A driver board--does anyone know more about this? Anyone have one? Pics?

 

[dr*audio]

Doesn't look like he got around to getting them ready for sale. On my 3000A I replaced the amp using an eval board for a driver IC made by NEC, which is no longer available. Parts Express sells some amp boards, you could look at those, or Google "amplifier modules."

 

[ggreenfield0]

Greetings,
I need some help on my 3000A
I have lost the 8 screws that mount the TO-3 output transistors to the back of the receiver.
Anyone know what size they are or a good source to get them from ?
Thanks,
George

 

[dr*audio]

They are going to be metric. I don't know what size but if you look in the service manual they usually call out the size of the screws in the parts list. McMaster-Carr has metric screws. No minimum order.
Edit: I just looked and the service manual shows no mechanical parts at all. Find a spare screw that fits the thread,and measure it.

 

[ggreenfield0]

They are going to be metric. I don't know what size but if you look in the service manual they usually call out the size of the screws in the parts list. McMaster-Carr has metric screws. No minimum order.
Edit: I just looked and the service manual shows no mechanical parts at all. Find a spare screw that fits the thread,and measure it.

Thanks Doc
I have one from a Superscope 1270 final amp assembly. Way to long, but appears to be the correct thread
I'll go a hunting tomorrow.

 

[Guido57]

Go to a local hardware store, like a locally owned Tru-Value or ACE. Unless you're in the real boonies they'll have metric, at this point in history maybe have them in the boonies.
You'll get better service if you need help and their stock won't be sold in bags where you almost never find the exact number of screws you need like in the big box stores.
I find TO3 transistors most often secured with M3 screws.

 

[Sansuiman]

I remember that thread, and it is a shame the finished product never made it to fruition. I'd maybe look at what the rail voltages and available current were on the 3000A and see if the output stage from another Sansui cap coupled era model could be grafted in to retain some sense of authenticity. Probably the output stage from something like a 2000 or 1000X could be adapted, and would give better stability to boot. You might actually find the boards needed for sale second hand, and just buy new suitable output devices. The power supply could also be modded to this same end, but that makes it an bigger project. Dropping in some modern, off the shelf amp kit can be made to work as well, but I'd find that solution disappointing, if it were mine.

 

[dr*audio]

Go to a local hardware store, like a locally owned Tru-Value or ACE. Unless you're in the real boonies they'll have metric, at this point in history maybe have them in the boonies.
You'll get better service if you need help and their stock won't be sold in bags where you almost never find the exact number of screws you need like in the big box stores.
I find TO3 transistors most often secured with M3 screws.

I thought M3 as well but I didn't want to trust my memory. As most of the TO-3 sockets are the same on Japanese equipment, M3 is a safe bet. Then you need to figure out the length. You can install a transistor and stick a wire through the hole until it just pokes out the socket. Then measure the wire in mm and now you have the length. McMaster or Amazon will have them.

 

[ggreenfield0]

Thanks everyone for the Help !
I ghet m3 x 10mm today !
George

 

[Guido57]

Depending on the degree of disassembly I've brought equipment parts to my local ACE to be sure of what I need. It helps that it's only a mile away from me.

 

[Sam Cogley]

Depending on the degree of disassembly I've brought equipment parts to my local ACE to be sure of what I need. It helps that it's only a mile away from me.

Same here. I walk into my local ACE with all sorts of odds and ends to match screws.