Verified Steel String Singer

[erwin_ve]

So I have started sourcing for the 002 build, it will be my amp build no 17. I recon to be finished by Christmas.

By the way, what switch is this, never seen that one before?

Rotary switch; check the github link that Ryan Colgan published; it has a BOM with most of the parts.

[martin manning]

I believe most people are using this one: https://www.mouser.com/ProductDetail/Al ... eSJQBUY%3D

[beasleybodyshop]

Those shown are 7 position, single pole rotary switches.

You can buy them from Mouser!

[Oddvar R]

So I have started sourcing for the 002 build, it will be my amp build no 17. I recon to be finished by Christmas.

By the way, what switch is this, never seen that one before?

Rotary switch; check the github link that Ryan Colgan published; it has a BOM with most of the parts.

I went to Github, amazing place...

[Oddvar R]

Those shown are 7 position, single pole rotary switches.

You can buy them from Mouser!

Thank you.

[rccolgan]

One time I brought a verified SSS #002 layout to a party and that party is still going on to this very day. It was really "hard stuff" that really blows minds and eardrums with tone.

@Oddvar R - Welcome to the discussion and enjoy your new project. As Erwin mentioned, most of the parts list is complete here (as well as most of everything else you need): https://github.com/colganr/steel-string-singer-sn-002

-Ryan

[Oddvar R]

There seems to be a part in all of these builds that has parts difficult to get. In the 002 build it's the inductor. What do you do if the part is impossible to get? Colgan says in the YouTube video that Master Electronics seems to be the only ones having them, (I have mailed them). So, what to use if they are out of production, a regular choke?

[norburybrook]

my understanding is the inductor does absolutely nothing to the tone so not having it there is the same as having it there

I could be wrong of course on this.


M

[martin manning]

@Oddvar R - Welcome to the discussion and enjoy your new project. As Erwin mentioned, most of the parts list is complete here (as well as most of everything else you need): https://github.com/colganr/steel-string-singer-sn-002

Ryan, can you post your final schematic in .pdf or something easily readable?

There seems to be a part in all of these builds that has parts difficult to get. In the 002 build it's the inductor. What do you do if the part is impossible to get? Colgan says in the YouTube video that Master Electronics seems to be the only ones having them, (I have mailed them). So, what to use if they are out of production, a regular choke?

That inductor has been the subject of much debate. The small values originally shown (300mH as above) will do essentially nothing. A 3H inductor would be large enough to have some effect, mainly limited to the high-end.

[Oddvar R]

@Oddvar R - Welcome to the discussion and enjoy your new project. As Erwin mentioned, most of the parts list is complete here (as well as most of everything else you need): https://github.com/colganr/steel-string-singer-sn-002

Ryan, can you post your final schematic in .pdf or something easily readable?

There seems to be a part in all of these builds that has parts difficult to get. In the 002 build it's the inductor. What do you do if the part is impossible to get? Colgan says in the YouTube video that Master Electronics seems to be the only ones having them, (I have mailed them). So, what to use if they are out of production, a regular choke?

That inductor has been the subject of much debate. The small values originally shown (300mH as above) will do essentially nothing. A 3H inductor would be large enough to have some effect, mainly limited to the high-end.

I got a this message from message from Master Electronics:
"Thank you for reaching out. After reviewing your request I have found that we are out of stock for the following:
You can still place an order and we will back-order the items you want from the manufacturer.
If you do place the order, the factory lead time is estimated at [ 9/28/20 ]".

If you haven't already seen this, great stuff here, best I've seen-:
https://github.com/colganr/steel-string-singer-sn-002

[jfs322]

I’ve seen many SSS clones use a Dunlop Red Fasel Wah Inductor, with much success (approx. 500mH, I believe, and in my experience, the values vary a lot with these inductors, so if you buy a couple you might even get a few measuring closer to 300mH).

And it's possible that the inductor does nothing. And I think Dumble himself might have made that same discovery, because by SSS #005, it was gone. SSS #005 does not have an inductor-driven filter circuit, if I recall correctly.

[pompeiisneaks]

my understanding is the inductor does absolutely nothing to the tone so not having it there is the same as having it there

I could be wrong of course on this.


M

I too remember someone here on the forums saying they did a detailed analysis of the circuit with spice or some other software and could clearly state that there is 0 impact to the inductor in he circuit. I'm no expert myself, so I'm only relaying what's been said here.

You can literally buy any small inductor that fits the component values, and it would work. an inductor is just a coil of wire, around a ferrite core. I don't see any magic there. The important characteristics of this are the resistance it adds due to excess wire winding, the inductance, (in this circuit the position apparently means nothing but, if it does, then hey..) if you match that, you're reproducing he circuit, and finally the gauge of the wire. If it's too thin it can melt under the current, otherwise I don't think it matters much.

~Phil

[jfs322]

my understanding is the inductor does absolutely nothing to the tone so not having it there is the same as having it there

I could be wrong of course on this.


M

I too remember someone here on the forums saying they did a detailed analysis of the circuit with spice or some other software and could clearly state that there is 0 impact to the inductor in he circuit. I'm no expert myself, so I'm only relaying what's been said here.

I'm not an expert either, but I wonder if the inductor really is doing something (at least in the early models) and the community is just not getting the filters 100% correct? My only reason for thinking this -- and perhaps I'm speculating -- is that the guys at Two-Rock, who have been inside SSS #002 and #004 (as well as some Dumblelands) (and thus have had more inside knowledge of these amps than perhaps anyone) still use an inductor on their SSS builds. And I'm presuming that they are smart guys, so presumably if when inside they saw that it does nothing, they wouldn't have bothered including it? Or maybe I'm give them too much credit, and they simply missed it but we've caught it? Or perhaps they too noticed it, but still include just for the sake of accuracy? In any event, Dumble ditched the inductor by SSS #005; it's been confirmed by Brandon that there wasn't an inductor in #005, so perhaps Dumble discovered his mistake or simply redesigned the filter network of the earlier SSS amps to no longer require an inductor?

[dorrisant]

I could be wrong but I I think it was Martin who ran the circuit through spice. While on the same tack he came up with rotary switch values that work well. If not, oh well. Here's the link to his better filter values:

https://ampgarage.com/forum/viewtopic.php?f=5&t=30118

[pompeiisneaks]

I could be wrong but I I think it was Martin who ran the circuit through spice. While on the same tack he came up with rotary switch values that work well. If not, oh well. Here's the link to his better filter values:

https://ampgarage.com/forum/viewtopic.php?f=5&t=30118

Yeah I'm pretty sure that was the thread/idea his improved filters basically make it a bit more useful, removes what does nothing, and several people have implemented his filters with good feedback that they do the needful and well.

~Phil