I guess I did a schematic of a Roger Mayer Red Lion wah. This is his drop in board. There is an additional 470pf capacitor. I think it goes between the wiper and the ground of the 100k wah pot. If someone has done it already, I'll take it down immediately. Thank You.

I cleaned it up some it had some obvious errors. I believe this one is good.

Well I'll say this...its a lot like a Dunlop Jimi Hendrix wah.

Just a note. If you want to build this one, remember the first lead on most transistors are the emitter and the last is the collector, this one has the emitter and collector switched around. One is three and three is one here.

Lets try that again. This is the right one. Terence

What changed?

the only 2 differences i can see are:
a 10k resistor that is changed on both schematics.
schem #1 - from collector of Q1 to V+
schem #2 - from emitter of Q1 to ground

also, the 47k directly next to Q1
schem #1 - tapped off the collector
schem #2 - tapped off the emitter

Big ups for tracing that out!   

The extra feedback stuff is interesting, looks like it would only change the Q.  The RM website says it changes the sweep range...time to reread Technology of the Wah. 

Quote from: Paul Marossy on November 22, 2008, 10:31:32 AM
What changed?

Paul I had to change two things depending when you saw the schematic. On the first posting I only saw one problem. The node made up of 33k resistor, 1.5k resistor and one side of the inductor was connected to a 6.8nf capacitor to the emitter of the third transistor. When I looked over the circuit I realized I had left out a 3.3nf capacitor that came from this same node to the emitter of the fourth transistor.

On the second check, I found the 10k resistor, from battery+ to the collector of the first transistor should have been 10k from ground to the emitter of the first transistor. There was also a closed short between the first transistor's emitter to ground. It should be between collector and battery+. The 47k resistor should be sent to the emitter of the first transistor. I am very sorry for the errors. I have gone through this carefully and I am certain it is right, now.

Quote from: caress on November 22, 2008, 12:38:35 PM
the only 2 differences i can see are:
a 10k resistor that is changed on both schematics.
schem #1 - from collector of Q1 to V+
schem #2 - from emitter of Q1 to ground

also, the 47k directly next to Q1
schem #1 - tapped off the collector
schem #2 - tapped off the emitter

Yes I am sorry see above.

Quote from: Celadine on November 22, 2008, 02:42:14 PM
Big ups for tracing that out!  

The extra feedback stuff is interesting, looks like it would only change the Q.  The RM website says it changes the sweep range...time to reread Technology of the Wah.  

Thanks but I don't think this is earthshaking. There is just an extra tone like the one that is the wah pot. on the original. It might be cool though to get both the trimmer and the wah pot connections into a double-ganged pot and see what flys.

Cool, thanks for the clarification. 

You're welcome Paul. Just one thing. The when you face a BC549C transistor, the emitter is the most right and the collector is left which is the opposite to most transistors. Thanks, Terence.

One other thing. I intentionally left out the battery eliminator and battery jack switch at the input jack. I felt they were obvious, but if uncertain there are many close up images of this product on the internet. If there are current copyrights this product pertains to, I will take the schematic off immediately without question. Thanks

Sorry, it has been so long. This was a bad link and I didn't realize it until recently. Here is a new link to a more complete schematic of the circuit. Its without the 8 pin male to female connector, as I considered it irrelavent, at the time. It just wouldn't be about building this circuit and more about copying it and remember, it should only be used as an informational schematic. No copying for personal gain, right?

Cool, thanks for posting.

Thanks John. It might be screwy to post this, but there is no current run of this model. I haven't seen any after 2002-03. Again if anyone wants me to take this down, for a good reason I will. I am just doing this for those who need a schematic for a broken one, or wants to build for personal use. Thank you.

Just updating. This basically shows the difference between the RM Red Lion and his standard wah kit. What is shown below is the actual form of the circuit added for Red Lion, in blue. The rest is of the earlier form of RM's kits, although I can't vouch for exact values as some were variable...pots for resistors, multi switched capacitors for a single capacitor, so forth.

-Cheers

Here is the correct schematics. It is part of a compilation of schematics which looks dreadful and bizarre, but has some nice choices of viewing size.

Enjoy!


http://www.angelfire.com/rock3/taktech