Ring Stinger Photos

[soundcollage]

Yes, here it is the Lovetone Ringstinger. There are a couple more photos at photobucket and i can take more if meed be. Let me know if you need measurements.







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[KarbonHed]

Wow, that will take some decoding  :shock:

But thanks, I always wondered what's under the hood of one of them.

[markusw]

Thanks a lot!!!!  

Tough stuff for reverse engineering (at least for me). Are the transistors still labelled?

Markus

PS: Some more Qs if you don't mid:

Are the pots labelled? What values are the caps? Are there specs on the two transformers? Could you probably take a closer picture of the small PCB?

Again, thanks a lot!!! I was waiting for this oportunity for quite some time.  

[corbs]

i'm supprised they don't cover that ldr/led coupling in anything.

[soundcollage]

All transistors marked bc549 028:c.

Pots from left to right overhead-- depth: 91a1ab24b20-100k(0032x), rate:91a1ab24b20-100k(0032x), freq: 91a1ab24b20-100k(0032x), drive: 91a1ab24d20-100k(0024x), timbre: 91a1ab24b20 100k(0032x), blend: 91a1ab24b10-1k(0032x).
I'll post the cap values when I get off work later.

[puretube]

[soundcollage]

I know my photographic skills are lacking, you don't need to rub it in.

[Bill Bergman]

Excellent bee picture Puretube.

[Connoisseur of Distortion]

you can see the individual hairs on that bee...  

pity all the ICs have been scrubbed clean of writing... but i suppose a schemo will show which chips would make the most sense.

any brave souls for tracing it?

[soundcollage]

Here are the cap values
photobucket butchered this-- the little blue caps are marked from top to bottom:
u1k63
u1k63
6n8k63
1n5k63
3n3k63
u47k63
6n8k63
a better picture of the sub board with the transformers and diodes will prob come in the next day

[soundcollage]

The transformers are stamped at the top LT-44. Looks like they tried to grind off the numbers but the stamp was too deep. These seem  to be balancing/matching transformers with a 20k primary and a 1k secondary.
By the way all u's should be mu's but I dont know how to make that character appear.

[puretube]

try: "Alt" & "m": µ   (the right-side "Alt" - dunno how it`s called in english - in german it`s: "Alt Gr")

[soundcollage]

Thanks it works µµµµµµµµ. Excellent photo, by the way.

[Paul Marossy]

Wow, that's a busy board. What does it do anyhow? Is it some kind of octave/distortion pedal?

[puretube]

Thanks it works µµµµµµµµ. Excellent photo, by the way.

now you can try "Alt Gr" & "e", to get a â,¬ (Euro)...  

btw: the pic was not intended as a comment on photographic- or camera-quality at all !  
Just remembered it, when I read the topic: Stinger & Photos

[ExpAnonColin]

More pics FWIW (someone sent me these asking for help reverse engineering it, said he drew a schem out, and then stopped answering emails).  I think we decided all the larger chips were quad OAs.

http://www.experimentalistsanonymous.com/other/Ring%20Stinger%20Innards.JPG

http://www.experimentalistsanonymous.com/other/ringinside3.jpg

http://www.experimentalistsanonymous.com/other/ringinside4.jpg

-Colin

[Paul Marossy]

I think we decided all the larger chips were quad OAs.

That would be my guess, not knowing anything about the circuit. I wonder if this is something like the Anderton "Quadrafuzz"?

[Connoisseur of Distortion]

the ring stinger is a ring modulator, i think. they have sound samples on the lovetone site... i really want their Flange With No Name  

[soggybag]

I like that it uses the transformers and diode ring method. I bet they have to be matched?

Does anyone know how to match transformers and diodes?

There was a guy on ebay selling a ring mod kit with PCB, jacks and tranformers and matched diodes. Someone on the list got one of these but I haven't heard any more about it.

[ExpAnonColin]

I think we decided all the larger chips were quad OAs.

That would be my guess, not knowing anything about the circuit. I wonder if this is something like the Anderton "Quadrafuzz"?

I'm afraid not... quadrafuzz is a multiband distortion and the ring stinger is a diode ring modulator, creating distortion while 4 quadrant multiplying.  Both are snazzy though

-Colin