Care to have a look at this schem?

[pinkphiloyd]

I have Super Reverb fever. And not that reissue BS, either. So, I keep looking for and bidding on old black and silver faces and they keep ending up out of my range. I like building my stuff anyway, so I've decided hell with it. I'm just gonna by parts a piece at a time as I can afford them and build it myself. But as long as I'm going that route, I figured I'd leave out the stuff I don't need. Which is, in short, the "normal" input side, and the entire trem section, I don't care for the built in trem, and I have a pedal for that. So I took the Weber schematic (because of it's clarity) and cut and moved stuff around in photoshop so I'd have exactly what I needed to work with and nothing extraneous on the sheet to confuse or distract me. I've looked it over a couple of times but will somebody double check and make sure I haven't screwed it up somehow? It's all appreciated.

[pinkphiloyd]

Oh, and I haven't completely ruled out building the "normal" input but with some sort of radically different voicing. Like, I don't know, a paralleled, 12AX7, Spitfire type input or something, if anyone has any opinions or suggestions on that.

[Colossal]

So, I keep looking for and bidding on old black and silver faces and they keep ending up out of my range. I like building my stuff anyway, so I've decided hell with it. I'm just gonna by parts a piece at a time as I can afford them and build it myself. But as long as I'm going that route, I figured I'd leave out the stuff I don't need. Which is, in short, the "normal" input side, and the entire trem section, I don't care for the built in trem, and I have a pedal for that.

+1 for building it yourself. Vintage stuff is great if you can actually get something that is in good shape but that is rare and it comes at a premium. Far better off using new components and you can, as you have noted, get exactly what you want. Also, you don't have to settle for anemic transformers either. Enjoy the process and good luck with your build.

[Gibsonman63]

I am a little opinionated about it, but I think having the normal channel is worthwhile. There has been some recent discussion about building BF Fenders without the normal channel. I forget the exact issues, but if I recall correctly, it had to do with the mixing circuit and voltages with fewer tubes. A quick search should put you there.

I use an external switch with mine to switch between the normal and reverb side. I haven't modified the normal channel, but I have been thinking about it for a while.

I would think that by the time you get all the right parts to do this build and buy four speakers, you could pick up a silverface Super Reverb. I would think that you would be into it for a grand or more to really do it right.

http://austin.craigslist.org/msg/2635558979.html

http://dallas.craigslist.org/dal/msg/2701758714.html

http://dallas.craigslist.org/dal/msg/2640944469.html

http://dallas.craigslist.org/dal/msg/2640944469.html

Of course, you could be on the other side of the pond where the prices are different.

[Milkmansound]

I love the single channel super reverb - but you may find that you have too much gain on the back end without that second channel being mixed in. I usually put in a cap and a voltage divider to mimic the second channel so that the reverb does not feed back explosively. Also gives you a spot to put in the optp tremolo if you are doing that

[Lynxtrap]

I thought cheap old Fenders grew on trees in the US
But even in Europe, I think building it yourself with high quality parts will be more expensive than buying a Silverface SR. Looking strictly at the economical side of it.

And IMO that schematic, without tremolo and normal channel, is sort of a "generic" BF-style Fender amp, rather than a Super Reverb in particular. But that's more of a philosophical question I guess...

[Gibsonman63]

I thought cheap old Fenders grew on trees in the US

Back in the mid-eighties when everyone was adding an extra tube to thier Marshall amps, Fenders could be had for less than the price of a new set of tubes (which is when I bought my modest collection). Fast forward a few years and the Japanese were renting booths at the guitar shows, just to have enough room for all the amps they were buying. Now everybody wants them again. There's an beige and oxblood tremolux head out there somewhere that I should have held on to, but I had to have a Twin Reverb.

Sorry to diverge.

... back to Pink Philoyd's upcoming project.

[pinkphiloyd]

I think building it yourself with high quality parts will be more expensive than buying a Silverface SR

Possibly. But doing a little here and there I shouldn't feel the pinch, and I like building anyway, so hell with it.

[rdjones]

I have Super Reverb fever. And not that reissue BS, either. So, I keep looking for and bidding on old black and silver faces and they keep ending up out of my range. I like building my stuff anyway, so I've decided hell with it. I'm just gonna by parts a piece at a time as I can afford them and build it myself. But as long as I'm going that route, I figured I'd leave out the stuff I don't need. Which is, in short, the "normal" input side, and the entire trem section, I don't care for the built in trem, and I have a pedal for that. So I took the Weber schematic (because of it's clarity) and cut and moved stuff around in photoshop so I'd have exactly what I needed to work with and nothing extraneous on the sheet to confuse or distract me. I've looked it over a couple of times but will somebody double check and make sure I haven't screwed it up somehow? It's all appreciated.

820 Ohm on the cathode of "V2B" is sized to bias 2 parallel cathodes.
This can be upped to 1500 for one tube.

In the absence of tremolo and mixing the .1 and .001 in series (C29 and C14) are duplicate functions.
The .001 and 220k alone would retain voicing.

reddog

[pdf64]

Getting rid of the trem intensity give about 5dB boost, then removing losses in the channel mixers gives another ~6dB gain boost.
10dB gain boost is significant, so if you want to retain the same pre-amp response as an SR then the signal will need padding down before the phase splitter.
NFB - the super has the NFB loop fed from a 2 ohm output, ie 50watts = 10V. An 8 ohm output at 50watts will be putting out 20V, so the schematic 'as is' has 6dB more NFB.
It would be more accurate to a SR to take the NFB from the 2 ohm tap, as it's available; that applies whichever tap the speaker load is connected to.
The phase splitter tube is shown as being a 12AX7; that would normally be a 12AT7.
I like 2 channel amps; just using different value mid caps (eg 22nF and 47nF) provides different voicing, then with a A/B selector box you've got a very flexible set up.
Pete.

[pinkphiloyd]

I have Super Reverb fever. And not that reissue BS, either. So, I keep looking for and bidding on old black and silver faces and they keep ending up out of my range. I like building my stuff anyway, so I've decided hell with it. I'm just gonna by parts a piece at a time as I can afford them and build it myself. But as long as I'm going that route, I figured I'd leave out the stuff I don't need. Which is, in short, the "normal" input side, and the entire trem section, I don't care for the built in trem, and I have a pedal for that. So I took the Weber schematic (because of it's clarity) and cut and moved stuff around in photoshop so I'd have exactly what I needed to work with and nothing extraneous on the sheet to confuse or distract me. I've looked it over a couple of times but will somebody double check and make sure I haven't screwed it up somehow? It's all appreciated.

820 Ohm on the cathode of "V2B" is sized to bias 2 parallel cathodes.
This can be upped to 1500 for one tube.

In the absence of tremolo and mixing the .1 and .001 in series (C29 and C14) are duplicate functions.
The .001 and 220k alone would retain voicing.

reddog

Thanks!

[pinkphiloyd]

Getting rid of the trem intensity give about 5dB boost, then removing losses in the channel mixers gives another ~6dB gain boost.
10dB gain boost is significant, so if you want to retain the same pre-amp response as an SR then the signal will need padding down before the phase splitter.

Pete.

I had wondered about this and I'll compensate accordingly. I planned on an AT7 for the PI, I hadn't even noticed that this schem had an AX7 in there. And I'll use a vintage spec OT with only a 2 ohm tap so that's where the negative feedback will have to come from.

[tubesinside]

OK...... so this is Steve Luckey's 'Tweed Deluxe Reverb' but I've adapted it for 6L6 output tubes and Super Reverb iron.
I can highly recommend the layout and adding a master volume as it allows the input volume to operate in the 'sweet spot' and compensates for the lack of the normal channel and the vibrato LDR.

[http://home.comcast.net/~seluckey/amps/tdr/tdr.pdf]

[Joe L]

R26 is shared between both channels so you will need to make it 1.5K.

..Joe L

[pinkphiloyd]

What about this? Good clean amp to counter the EF86 spitfire i recently built? Clean is what I'm after. Thought I'd take one more look around before I started ordering parts.

Oops, forgot the link.

http://www.ebay.com/itm/Vintage-Fender- ... 720wt_1189