Single channel non reverb Twin style build

[mmmoser]

I have a request to build a single channel Blackface Twin but without the reverb. So, its really almost a Dual showman but with one channel. So, the only question is that the dual channels meet into a mixing set of 220k resistors...and if I am eliminating the normal channel, do I also eliminate the mixing set or keep the 220k resistors and run one to ground? This is the AB763 circuit we are talking about here.
Thanks in advance

[Reeltarded]

Yes, just ground that leg of the mixer and good to go!

[martin manning]

Maybe you have this covered, but if you remove the reverb circuit, you'll need to do something where the 10pF//3M3 is so that you have a grid leak path to ground and the signal level is where it needs to be.

[mmmoser]

Just going to mimic the Showman but with single channel, so no reverb there to begin with. But thanks for mentioning this for future reference.

[M Fowler]

Here is something you can go by.

[rogb]

I found this Steve Luckey design, it certainly helped in my AB763 build.

[cbass]

Twin reverb Without the reverb?
Thats like a cheeseburger with no cheese.

[mmmoser]

Thanks for the schematics and layouts. I have to agree a Twin Reverb with no reverb is not really a Twin Reverb...but since the customer is always right, this is what I will build.
Since the Dual Showman Vibrato channel is basically the same thing, this is what I will use. The customer wants a big clean sound...and tremolo.

[mmmoser]

So to finish off this thread, I built the circuit and shipped it off to its new home. It was 80 watts of loud clean but modded with a PPIV master volume to maintain some sanity. Thanks for all the help. More pics at my Facebook page.

[Teleguy61]

Looks like you used Mag Comp iron in your build.
Should be great.
AB763 Showman is an awesome amp. They start to sound real good with volume around seven and a half.
Of course, you can't be standing in the same county with an amp that loud, but it sounds great.
A defining electric guitar amp.

[mmmoser]

Yes, Mag Comp stuff all around. I can honestly say I think they provide the best bang for the bucks in transformers out there. I am not a paid spokesperson for them. I certainly have no issue with Heyboer or other makers but day in and day out just great tone at a great price. And I am all about the best tone for the least buck.

[fusionbear]

I did something similar, but with KT88's:

[IMG:640:480]http://i169.photobucket.com/albums/u223 ... 622ec2.jpg[/img]

[IMG:640:480]http://i169.photobucket.com/albums/u223 ... 376c58.jpg[/img]