How to test, measure and connect Tube amp Spring Reverb Tank Simple procedure Example Fender Super

After receiving many e-mails requesting the same info, I decided to make a quick instructional video. Many amplifiers with loss of reverb function is normally due to wear & tear over the years. This video will demonstrate a easy process to determine if your tank is at fault. If it passes this test, the problem lies within the amps circuitry. I plan to release more of these informational video as time allows. Hopefully this is of value to you. Please help my channel grow by spreading the good word. Also, if you want to support my shop efforts, see: / dlab_electronics

[@bobrich1950]

I'm confused. So does the reverb OUTPUT JACK ON THE AMP connect to the output jack on the reverb tank ? Or does in connect to the input side of the tank ? Thanks

[@hershelshochter4703]

you can rewind the input side with thin enamel wire and some patience. the output coil uses incredibly fine wire and is most likely beyond most people's ability to rewind. dont ask how i know

[@edwardhannigan6324]

Great info video Terry...Another lesson learned...Thanks for sharing.. Ed..UK..😀

[@alexcorona]

Thank you for this video, I got a amp recently and the reverb is barely noticeable. I have to Max it out to even notice anything. Gonna take it out to check!

[@mikehaisell4301]

I just replaced the cables and it works fine now. THanks

[@dean2287]

That was GOLD. Thanks!

[@williamelrod4199]

I was just about to email you to ask this very question lol.

[@jhowellkc]

Great, concise and informative video. Worth noting, though, that those readings may be dramatically different for other amps besides Fenders- the basic premise is the same but the impedances can be drastically higher on other tanks, and the grounding schemes can vary as well.

[@d-labelectronics]

I agree, Yes, I will try to feature other configurations. Thank you for the input

[@jhowellkc]

@@d-labelectronics Someone needs to do a comprehensive video on the topic- there's not a lot of easy to find information or documentation out there, and a LOT of variation when it comes to tank specs and implementation! Thanks for this video, though- it's great and for a lot of people, this is all they need!

[@nathkrupa3463]

Thanks sir nice information.

[@jessupjackson2414]

if i the reverb tank is defective/absent and the amp is old without any kind of known internet documentation, how does one determine the I/O impedance expected by the amplifier for a compatible tank? asked differently: how do you read the amp to know what reverb tank it expects?

[@rocksmonsterriffs]

I have an (EVH 5150 100 STEALTH ) plugged into a load box (Torpedo captor X ) for direct recording through IRs. When I have the sound turn down on the monitors and I play the guitar, I can hear it coming from the amp head tubes There should be no sound since the monitors are turned down. is this normal for high gain amps

[@tschupbach]

I have seen broken wires from the coils to the jack in the tank which is repairable. Coils, however, are not and the tank is scrap.

[@RockyW12345]

I was going to note that...I always open up the tank to check those connecting wires to the jacks when I get an open reading, especially in older reverb tanks. Those thin wires do oxidize over time. A quick touch up re-solder, and that tank should sing. Also, check to see if the springs are connected inside the tank. All in all, great video...I'm a subscriber to your channel and your videos are always informative @D-lab!! Thanks!

[@rustyrobinson8027]

Good one thanks

[@santoselrolo5449]

🫤 amp output to tank output and amp input to tank input ? Is it the right way to reconnect rcn cables, someone help (found and old KMD amp in the trash with tank cables disconnected)

[@mikehaisell4301]

Hey this is great! I have the amp apart and one of the RCA plugs looks bad, bent and bare wire showing. I don't think I can get to the other end of the cable to replace it. I will just solder on a new plug I guess. Are those values you give universal? My amp is Traynor AM50T. I had to remove the speaker to get to the tank. Thank you.

[@Vicos]

The model number of the reverb tank is coded (4AB3C1B for example). The 2nd and 3rd characters designate the input and output impedance for that model. The mojotone FAQ page explains this under "reverb faqs." If I post the link here, the gods of KZbin will delete my post, so search for it.

[@gregrose6915]

I'm getting a reading of 168 ohms from both the input and output jacks on a Accutronics tank. Is this a good reading?

[@d-labelectronics]

Depends on the amp its going in

[@bigmac4948]

useful.. thanks

[@waynegram8907]

D labs, most buffer pedals the output impedance is very low impedance now in a reverb tank the input impedance to the river tank is very low impedance and the output impedance of the river tank is very high impedance this is against the rules of transferring power current and voltage to the next stage I don't know why they made the input in penance low on the reaper tank in the the output impedance high on the river tank this seems backwards or some type of reverse because the power transfer is going to be off it's going to be less so maybe you could explain why they did it like that because if you look at any guitar pedal they're trying to make penis is very high as possible it's very low but on the river tanks they reverse it which is doesn't make sense

[@gregrose6915]

what is the difference between "input grounded" vs "input insulated"? or "output grounded" vs "output insulated"? Thanks.

[@Vicos]

grounded means the [input or output] jack negative conductor (the outer metal ring on RCA jacks) is grounded to the chassis. Insulated means just that in regards to being grounded to the chassis. You can check for continuity between the jack connections and chassis to see for yourself. Each reverb tank has an input and an output jack, and they are usually labelled as such.

[@johnsimms3957]

Excellent.

[@douro20]

I have a small package on the way to you.

[@d-labelectronics]

Is it ticking? haha, Thank you my friend. Received the 6197 tubes! Very nice of you. I was actually working on a Ranger when they showed up. Used 1 right off the bat. Good timing! Thanks again my friend

[@cesarolivo171]

Thanks sir