transformer for spring reverb?

[caress]

i'm building this reverb design by forrest cook:
http://www.solorb.com/elect/musiccirc/reverb2/index.html

i'm all set but curious about the transformer...  i found this one on mouser - 42TU400, which is a 500CT - 8CT.  on the schem, there is no connection for the center taps...  can anyone advise me on how to wire this or if i even got the right transformer?  also, the P side is the 500ohm side, right?   

[dirk]

The Mouser trafo you selected has a power rating of 0,46 Watt.
The trafo in the schematic needs to be 10 Watt.

[d95err]

I don't see the point of using a transformer with a solid state reverb driver. A small SS poweramp like an LM386 chip should be able to drive an 8 ohm reverb tank directly.

[stobiepole]

You should be able to work it out from this layout image:

http://gaussmarkov.net/layouts/springrev/springrev-perf.png

The whole project PCB is here:

http://gaussmarkov.net/wordpress/circuits/spring-reverb/

I used a standard 42TM018 Mouser type transformer, from memory.

Chris

[Arfman]

i'm building this reverb design by forrest cook:
http://www.solorb.com/elect/musiccirc/reverb2/index.html

i'm all set but curious about the transformer...  i found this one on mouser - 42TU400, which is a 500CT - 8CT.  on the schem, there is no connection for the center taps...  can anyone advise me on how to wire this or if i even got the right transformer?  also, the P side is the 500ohm side, right?   

You should be fine, just don't use the centertaps.

Yes, the primary is the 500ohm side.

[Mark Hammer]

The Mouser trafo you selected has a power rating of 0,46 Watt.
The trafo in the schematic needs to be 10 Watt.

I think the Mouser one will be fine, and the seeming need for a 10W transformer is really more one of a unit that Forrest Cook knew would have the needed primary and secondary impedances.  The recommendation likely has nothing to do with required power-handling capabilities.

I don't see the point of using a transformer with a solid state reverb driver. A small SS poweramp like an LM386 chip should be able to drive an 8 ohm reverb tank directly.

True, and that's why the "other" circuit Cook shows uses one. http://www.solorb.com/elect/musiccirc/reverb/reverb.gif
On the other hand, his use of the term "obsolete" suggests that the second one has some sort of sonic advantage, or perhaps simply a current-consumption advantage.

[caress]

thanks for clearing up some of my questions...  great replies