TS808 IC Question

[KevinSTP]

I have a Boss BF2 flanger that has 2, 45580dd JRC 2417 chips is this the same as in the 808? can I use them for this.

[Joep]

yeah, but Small Bear sells them too. Both the JRC4588 and the RC4558. These two IC's are supposed to be the Holy Tubescreamer Grail.....

Buy a IC socket and a TL072 and a NE5532 too and deside for yourself which one you like most. Search the forum too, there have been a number of posts about which IC should sound the best in a Tube Screamer.

Leave the flanger as it is, in my opinion it's a waste to canibalize it over a single IC.

Happy Holiday to you all!

Joep

PS Small Bear is closed now and will re-open at the 12th of january.

[KevinSTP]

Thanks :I have 2 of these flangers and an MXR ac flanger which is much better so I don't mind losing one,but if I got that way I will put a socket in the flanger that way I can try the chip and replace it.I wonder if the BF2 is tradeable?

[javacody]

Sell the flanger on ebay. Don't butcher it for a $0.45 part!

[KevinSTP]

Makes sense to me.I have never used ebay to sell guess now is a good time to try it.I see different TS 808 schematics around anyone have a favorite?

[javacody]

What you make on that flanger will probably pay for all of the parts you need for a tubescreamer.  

I'm not sure which schem? I think that they are all about the same?

[nightingale]

kevin~
i built the GGG version to specs... it is great, sounds very close to my friends "analog man" modded ts9 to 808 specs... just for kicks i want to try jacks mods founds here: www.muzique.com
the mods are in the lab notebook section on the navigation to the left...

i'll try to post some picks of my ts808 later tonight...

[KevinSTP]

Thanks for your input Ryan,what was yout source for the IC.I think I will start with a simple booster as I gather the parts for a TS.

[brett]

Hi.  A few personal opinions wrt TSs.  
1. Definately use an IC socket and try different chips.  For $2 or $3 you can have some fun choosing and get a better pedal.  Expect to become a heretic and really enjoy some non-4558 chips.
2. Of all the "mods", you'll get good value from the simple "body" mod which sees the 0.047uF cap that grounds AC in the feedback loop increased somewhat.  Try values around 0.1uF for a solid increase in low-mids.
3. The other mod that gives major bang for your buck is to go for dissimilar/unusual clipping diodes.  I use a Ge and a Si (1N60 and 1N4148), which gives a sweet, asymetric effect.  Foir higher output maybe try 2x1N4148 antiparallel with a single 1N4148 (1n4148=1N914 and is similar to most Si diodes, including "power" diodes).
4. In my experience, don't expect too much from changes such as swapping the tantalum caps for foil, etc.

[javacody]

Kevin, I would start out by purchasing a couple JRC and TI 4558 chips from Small Bear. You can search the forums for other suggestions. Each chip has a slightly different sound, and now it turns out, you can stack the little buggers for even more experimentation.

[KevinSTP]

Well it seems that a Peavey amp that I was given due to a dead transformer has a bunch of 4558 chips on the board.I will get a couple from Small bear when I place an order soon and try a few different ones in the pedal.