5E3 with Blackface Reverb circuit?

[psychepool]

I want to put the Blackface Reverb circuit on 5E3.
To be accurate, it's a 6L6 Fixed Bias 35W 5E3 power amplifier,
and in the preamplifier section, I use only one triode of the first tube and try various Mods.

As a result, the half of the tube remains, and I thought I would add a reverb with additional 12at7.

The reverb circuit itself has already been verified, so the necessary information is
1. Where will it be placed?
2. Which value of the mix resistor should I choose?

Because it is simple circuit and there are few stages, it is likely to be one of two places to put the reverb.
It may be either behind the volume pot or in front of PI. In other words, either in front of V2A or in front of V2B.
Which is the right choice?

And how is the value of the reverb mix resistor determined?
Is it possible to use a 3.3M resistor (with a 10pF cap parallel) as is used for the Blackface?
Or should it be set again for the amplifier circuit?

Belows are the references.

5E3 schematic
http://2.bp.blogspot.com/--XXcESnLLB0/T ... em+(1).gif

Deluxe Reverb schematic
http://www.thevintagesound.com/ffg/sche ... _schem.gif

Please answer me.

[statorvane]

Nit sure if this is a blackface reverb circuit, but here's a reverb added to a 5E3: http://sluckeyamps.com/tdr/tdr.htm

[Stevem]

The biggest concern with going back up stream signal wise to use that unused gain stage will be the phase of the signal !

The reverb input to that unused gain stage will be much hotter then the signal already there at that first gain stage , and if the reverb signal is of that same phase then you stand a real good chance of having a oscillating monster on your hands!

This is why Fender places the reverb recovery tube where they do on the chassis!

The other question is does your power supply have enough spare current to power that 12AaT7 to drive the transformer?

[pdf64]

Fixed bias, 6L6, reverb - why refer to this as a 5E3?
I think it would be beneficial, even essential, to sketch a schematic of what you are proposing.
Text description of a schematic are problematic and may lead to confusion.

[psychepool]

Fixed bias, 6L6, reverb - why refer to this as a 5E3?

To be accurate, I wanted to implement the several amplifiers that has 1volume 1tone by switching the parts of 5E3's first stage through the rotary switch.
I wrote it '5E3' because I think it will get out of the issue if I write it in detail in the text of this plan.
The physical structure itself will be based on 5E3.

The reason for putting the reverb is that as it is written in the text, only one channel will be used, so the half of the tube is left.
So I want to use it frugally.


My production plan is basically like this.
(Please note that there are some incompletes : B+ of Reverb Transformer, Fixed Bias, etc...)

5C6FD92A-233C-410A-9261-BBB7F980E273.jpeg

The biggest concern with going back up stream signal wise to use that unused gain stage will be the phase of the signal !

The reverb input to that unused gain stage will be much hotter then the signal already there at that first gain stage , and if the reverb signal is of that same phase then you stand a real good chance of having a oscillating monster on your hands!

This is why Fender places the reverb recovery tube where they do on the chassis!

As you mentioned above, simply adding the Blackface Reverb circuit to the 5E3 seems impossible.
It's not an amplifier with preamp distortion anyway, so I don't feel the necessity to put a built-in reverb.
But if I can solve the problem mentioned in a easy way, I'd like to put it in.
Is there a simple solution?

[sluckey]

Nit sure if this is a blackface reverb circuit, but here's a reverb added to a 5E3: http://sluckeyamps.com/tdr/tdr.htm

Just to be clear, the TDR is a single channel AB763 Deluxe Reverb with no tremolo. The circuit is not a 5E3. The only thing "tweed" about the TDR is the cab.

[tictac]

Kendrick made an amp called "Black Gold" that was a 5E3 circuit with reverb. I believe he added reverb in such a way that it didn't interfere with the 5E3 signal path.

There's a Gibson amp that's basically a 5e3 with reverb. If I can find it I'll post...

TT

[tictac]

This is it, see how they insert the reverb return between the 2nd gain stage and the PI....

Also check out the reverb input, where they take the input signal from and how they have a gain stage before the reverb driver...

The reverb recovery stage is a pentode but a triode should be sufficient gain I would think...

TT

[10thTx]

Gibson Scout GA 17RVT uses a one tube reverb. It works reasonably well. IF you don't have to have "surf" quality reverb, you can make it work with a one tube reverb.

http://el34world.com/charts/Schematics/ ... _scout.pdf

My Carolina Blues Special used a one tube reverb and I liked it really well. I made two others for friends and they were happy with theirs also. However, the design I used, the reverb had to be readjusted when the volume knob was changed. That was fine for me and I never considered it a problem.

With respect, 10thtx

[tictac]

Right, the GA 19RVT posted above uses a one tube reverb as well.... a 7199 triode/pentode combo. There are other variations that would work as well...

TT

[Lauri]

Easiest way to add reverb to 5E3 is to take signal from bright channel to 12AT7 reverb driver and use the normal input as a reverb recovery.

[psychepool]

Easiest way to add reverb to 5E3 is to take signal from bright channel to 12AT7 reverb driver and use the normal input as a reverb recovery.

Is there many difference with this? They looks very similar to me.

2C12EBD7-5720-47CC-B148-AC1A70357FC7.jpeg

What is the most important difference between the two?

And this schematic seems almost same with princeton reverb except 1st stage.

[Lauri]

What is the most important difference between the two?

Most important difference is how the reverb and clean signal are mixed. In your version the signal is attenuated a lot and my guess is that way you'll lose quite a bit of that magical 5E3 sound