Messages

The battle rages on. Great looking pedals!

Mos excellent build inside out, great stuff!

The 5R4 rectifier while only having a 2amp heater draw, so in that sense comparable to 5Y3, it has as first filter cap allowance according to datasheet only 4uF max rating for first node filter cap, so that might be a problem if you substitute that in.

Wow! I never checked that. Makes sense though as the amp I saw them in was an old Altec 1570B which uses a 6uf oil cap.
Thanks for bringing it to my attention

I do think that rectifier was not really intended for audio use where a very clean DC line matters. Unfortunately...

Superb built and the artwork is stellar.

Very cool build, nice to see!

Great that its going again!
The 5R4 rectifier while only having a 2amp heater draw, so in that sense comparable to 5Y3, it has as first filter cap allowance according to datasheet only 4uF max rating for first node filter cap, so that might be a problem if you substitute that in.
If you don't want to increase voltage I would stick with 5Y3.

What he said.

You have 100uf on the first b+ node!? You 5y3 might be arching in a painful death. Way too much filtering for a tube rectifier.

Edit: Looks like it might be 50uf on the first node. Still too much for that rectifier. My guess is that that 5y3 is the culprit.

This.^
If you have 50 uF on first node you could try a GZ34 rectifier, but that will also increase the B+ voltage a bit.
GZ34 are rated for max 60uF on first node, so that should be good. An advantage of the GZ34 is that it is indirectly heated an that means a nice gentle slow start up of hi voltage (about 12 to 15 sec).

Spiffin'! 

Sweet as and super video, so well played to show it off and great edited! Fun fun fun!

Hot graphics, you gotta play 'Eruption' on it first thing when it comes together.

Excellent and looks like a lot of fun, even if the wife won't agree...  Great build.

Thanks for the kind words guys, I'm humbled seeing all the good stuff that you guys pump out here all the time!

Just when I think I have something for the BOTY contest, BAM! Foiled again. That is beautiful, I'm jealous of your skills.


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Oh come on Jimi, I'm looking forward to seeing your build in the BOTY and all the other ones that'll be coming up in there, always a feast.
This will be indeed my entry for the BOTY I think, so I'll make a video at some point as well. I'm just early out of the gate this year because at some point soonish I'll have to pack up all my workshop and stuff as we are moving. Not sure how long it will take until I have a functioning workshop again, we'll see.

Thanks again guys for the kind comments.

Here she is now, all finished and warbly. Since I had the 'cold' look of brushed aluminum enclosure and acrylic I wanted something to balance it out.
Yin Yang, light and dark. That's what the Univibe bulb does, light and dark to create magic.
So the next materials to finish the exterior would be from the opposite end of 'feel':
leather for the treadle, wood, bone and paua (NZ native abalone) shell for the Yin Yang logo plate.

I called it the "Yin Yang Machine":























How's it sounding, I hear you ask.

Fabulous and having a Univibe that you can speed adjust while playing is just amazeballs fun.
Thanks Brian for such a cool project, highly recommend building it to everyone!
I might still after exploring it as is tweak some resitor values (the speed range) and the gain and bias trimmers, for now my better half keeps asking me "What's that suspicious big grin on your face about then...?!".

Spiffin' and graphics with special powers.