SSS - Nukular Warhead - Chassis are Finished

[tubedogsmith]

Just don't let him do any vids with it!!

[txbluesboy]

I believe Matchless uses this tone control because the EF 86 has a fairly high impedence output and cant handle a typical tone stack. To have some tone control, you have choices of different coupling cap values.

[Structo]

I was looking at a schematic for the newer VOX AC15 the other day.
It has a EF86 on the normal channel.

It also has a cathode follower tone stack on the top boost side.

[Max]

According to what I've heard, the set-up in an SSS is similar...but uses a 12AX7 instead of a 12BH7 as a cathode-follower/driver.

Hi thyx,

which of the tubes you see in the posted pictures of Henry's 100W SSS do you think is the inverter and witch one the driver?

Max

[thyx]

According to what I've heard, the set-up in an SSS is similar...but uses a 12AX7 instead of a 12BH7 as a cathode-follower/driver.

Hi thyx,

which of the tubes you see in the posted pictures of Henry's 100W SSS do you think is the inverter and witch one the driver?

Max

I'd say the one closest to the power tubes is the PI...note how the cathodes are jumpered together pins 3 and 8. I don't see a seperate cathode-driver afterward...but this is a 6L6 amp, so there probably isn't one. I think the first two built were both 6L6 versions for 100 watts. The later 6550 versions were closer to 150 watts and I think that's when the post-PI cathode-driver concept came in.

[M Fowler]

What is that switch on this SSS small one right before the logo it is on some models but not others I can't make it out ??? frequency I think?

Mark

[jelle]

'Accent'.

[M Fowler]

Thank Jelle,

I found it after you clarified that for me. Right infront of my nose the whole time.

[txbluesboy]

What is "accent?

[dr. who]

thanks for posting that tx

[txbluesboy]

You're welcome. Its been pretty quiet on this thread. Is anyone making any headway?

[M Fowler]

Drilled my holes in the chassis and mounted the faceplates other than that I have been busy building other amps. Still deciding on what components I want to go with.

I'm afraid my SSS will be an ongoing project over many years as I have so many other amps I want to build and I really don't have that much interest in Dumbles anyway. Perhaps that will all change some day.

Mark

[RJ Guitars]

Dumble & SSS builders,

Slowly I crawl along on this, a little piece at a time. I had big plans for getting the schematic done but ran into some confusion when I started digging into the SVT power amp circuit. I wasn't expecting something that looked like a cathode follower as an output tube driver. I am beginning to grasp the concept and sort out the particulars but would welcome further enlightenment from the wise ones among you.

I've broken down what I believe is the SVT output tube driver circuit and drawn an isolated schematic of it. I think I understand it now but would love to have some additional eyes review it and see if I've captured it.

There are still some unknowns and a couple non-intuitive pieces.

1) The filter caps on the power supply seemed funky but as I went through it all I think it makes sense... which could be proof that I know nothing! Anybody else see the logic in this or am I the lone ranger?

2) The 1.5K linear pots seem to be something that can be used to reduce and/or balance how much signal gets to the output tubes? Is there more and I am missing something important here?

3) I think there is mention earlier in the thread about what the correct voltages should be at nodes A & B, but any further info on that would be appreciated.

Ultimately, the SVT power amp seems substantially different compared to the Fender Twin power amp. Currently I plan to follow the SVT as I put together a prototype SSS schematic... unless someone has a convincing piece of info that the actual SSS was more Fender like.

thanks, your kind critique is requested.

rj

[Chad]

I wish I could critique your info, but you (among others here) are be on my intellect on the SSS . I apreciate all the work you and others have done to find out the sss because that is the amp that got me into the D-Style amps, Plus SRV. Thank you for all you have done and I hope I may be some help to someone someday like the folks here have been to me. Thank you again. Chad

[RJ Guitars]

I came up with a High filter for my SSS that actually works...

Terry,

I forgot to say thanks to you for the filter info. Thank you very much! You are indeed a pioneer on this effort. BTW - do you have any clips for us yet?

In looking over the filter options it seems that these filters have to be passive units... that is, they only take away something and never add anything. I guess that would be the true definition of a filter wouldn't it? Making that assumption, Zippy planted an idea in my head that at one setting point I ought to have a direct-thru bypass. That would simply allow every bit of tone and volume that your guitar/amp produces to go thru. That seems like a useful setting even if it doesn't turn out to be the one you tend to choose all the time.

Also, thanks for the kind words Chad, there are many great contributors behind the scenes and openly on all these projects.

rj