Tube Reverb, Part 1 

Another excellent tutorial, Doug. I have a question: do you refer the the LPF (C12, T3 and C13) as a "Pi" filter? I was taught that nickname years ago as it has a shape vaguely resembling the Greek letter. EDIT: That's a beautiful truck.

my question is ? has anyone out there built this reverb according to the layout diagram and schematic. on the top lay out the electrolytic caps have one red and two yellow wires coming from them. yet when you look at the under chassis there is two red wires and one yellow wire coming from the top as far as I can tell. the other thing that I wonder about is the output jack has all 3 contacts to ground and the wiper on the mix pot . the last time I attempted to build something it was from a book all about tube amps and when through with it it didn't work, checked it several times . no go. got on the net and after much searching found out there were 3 wires left out of the schematic in the book. nuff said. Otherwise I love all the videos. I just wish that the people that write stuff would build what they publish.I don't think uncle doug is at fault but I wonder about who did the layout after.

Thanks, IT :)

It's climbing over the fence as we speak :)

makes my tongue numb just thinking about it. :-\

The Guitologist Well that’s really good; I hope you never do. I stupidly have, 220 across the chest, very lucky to tell of this idiotic stunt.

I welded a screwdriver into a 200 amp service panel once. Scary and fun all at the same time. Having said that once was enough to make me buy insulated screwdrivers 😂

I once tried to pulled two 100 amp 600 volt fused one in each hand. Had entry and exit holes in my fingers. Was stupid enough to believe my apprentice electrician had turned off the main switch, when I asked him. I screamed like the guy from the movie Home Alone, when he got electrocuted on the basement sink handled.

You're welcome, JM :)

You're welcome, Chad. Thanks for sharing this interesting story.

You're welcome, Justin :)

You're welcome, David.

Please check out my other channel: Uncle Doug's Hot Rod Garage, Brandon.

Thanks, AM. Likewise from Texas, USA :)

Thanks.....twice, Jeff :)

You're welcome, Steve :)

Thanks, Joe. Some topics just require more time to cover fully.

You're welcome, Colin. Jack says "back at ya" :)

Thanks, Steve :)

You're welcome, Scott. I'm glad you enjoyed the video :)

Glad to help, Garrett :)

Thanks, Craig :)

You're welcome, Hack. I guess I'm just defensive after so many people have complimented the "black" paint job :)

Thanks, K :)

If you mean that the reverb tank is driven by an output transformer, just like a speaker......yes, it is.

@@UncleDoug yes, the magnet part as well...

You're welcome, Pat.

Thanks, Michael :)

Thanks, Wayne :)

Thanks, EJ.

Thanks, Brian. There is something magical about music.

Thanks, George :)

Thanks, R&R :)

Thanks so much, C58 :)

Thanks, PC :)

Thanks, JJ. Until then...............

Thanks, Mitch.

You're welcome, Ron :)

You're welcome, Stephen :)

You're welcome, CB. Thanks so much for your very nice comments. Tommy is being overworked by his heartless employers, but the schematic should be posted soon.

Thanks, PJ :)

Thanks, Francis :)

That's good to hear, E.

That's an interesting color comparison, GP. Thanks !!!

You're welcome, Jason. Best of luck.....it's a tough, but rewarding business.

You're welcome, Yman :)

Thanks, Dave. Jack is one of those rare performers who actually seems to benefit from "herbal stimulation" :)

Thanks so much, Fabio :)

Jack and I both say, "Thanks !", Dave.

Thanks, Phil :)

That's great to hear, George. Welcome aboard :)

You're welcome, Gabi. We'll keep on trying to be your number one channel :)

Thanks, Sebastiaan. Glad you liked it :)

Thanks, Keith. Weird analogies tend to stay with us much better than the old, boring ones :)

Thanks, Monty :)

Welcome aboard, SK :) Glad you liked it.

You're welcome, ZS.

Thanks so much, Danny. Glad you enjoyed it.

You're welcome, Daniel :) Thanks !!!

Those were the good old days, Craig. Nowadays, they sell booze in Texas on Sunday.....or so I'm told :)

@@UncleDoug yes sir I quit drinking a few years ago myself.

@@craigjacob3704 Good move, Craig.

You're welcome, CC. Thanks !!!

Glad to hear it, RR.

Thanks so much, Kevin. It's good to hear from a fellow Texan :)

Thanks, Kley. Reverb is indeed a wonderful effect :)

Thanks, Matt :)

You're welcome, Matt. Thanks !!

You're welcome, Steve. Thanks for all your very nice comments :)

You're welcome, Carl. Thanks so much for your nice comments :)

Thanks, SW :)

You're welcome, Rick. I've never had a chance to work with a Premier reverb, but would love to do so. Thanks !!!

You're welcome, Zeymen.

Thanks, GM :)

You're welcome, Rob :)

Thanks, MM. It was your reward for staying awake during the 30 min. "lecture" :)

Thanks, TM. It's always good to hear from you :)

Thanks so much for all your very nice comments, KS. I would say more, but I have to hurry off to my flamenco dance lessons :)

Thanks. Just wait until you see it all completed, CD.

Thanks, Sarah.

Thanks, JC.

Thanks, Matthew :)

Thanks, Francis :)

Glad you enjoyed it, Jonathan :)

Thanks, Alex :)

Thanks, James. Sorry for the choking incident :)

Thanks, Wes :)

Thanks, Joe. Good luck with the repair.

You're welcome, James, and thanks for all the very nice comments :) Two EV 10" speakers are an enviable burden.....they MUST be used in a project :) Here is a great comparison of plate and spring reverb: theproaudiofiles.com/plate-reverb/ To me, the plate sounds much cleaner, like a pure echo.....while the spring sounds more jangly and noisy......but I'm not sure, when it comes to surf guitar signals, that the spring might not sound better, while the plate is much better for voice.

Uncle Doug I totally agree with you Doug on the guitar reverb. Likewise, the voice and some acoustical sound sound amazing through plates. Judy Collins singing “Farewell to Tarwathie” on her _Colours of the Day_ LP is amazing... especially with the whale’s voices to supplement. No, I did not just drop L-25. I might. Have in ‘72 though. Take care and thank you for the link. I am going there now.

Thanks, ET :)

I noted your pledge and am very appreciative of your support, Bill. Thanks so much. We will :)

Thanks, RTE :)

Thanks so much for all your thoughtful and accurate comments, Mark. The top of my head can be seen from space ;)

You are quite welcome, Holger. Thanks so much for all the nice comments.

Thanks, FW. Glad you enjoyed it :) Nice acquisition !!

Thanks, Fabiano. Glad to hear that you enjoyed the video series :)

You're welcome, Brian. Yes, I would say that the 6G15 offers the finest tube/spring reverb that the world has ever heard :) Thanks !!!

Thanks, Ivan :)

Weird analogies tend to stick with you longer :)

Agreed!

I'm glad you joined us, BB, but hope we didn't keep you up too late :)

Thanks so much, Thomas. Glad you enjoyed the video and the old Ford truck. Purists who espouse total originality apparently never tried to drive an 80 year old vehicle in modern traffic, let alone the Interstate. It's quite possible to have nice, original looks with modern performance.....the best of both worlds.

Thanks, SS. Ditto on the bed. They do look great for a while, but are really impractical, especially out here with the scorching desert sun.

It could be yours, Jeff ;)

Thanks, Simon :)

Thanks, Frank :)

An interesting experiment, Joe, that proves the fact that the initial reverb-driving circuit is virtually identical to a 3-tube amp, and the tank is analogous to a speaker. Thanks for sharing this with us.