NAD: Tweed Deluxe 5b3 Clone

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So I waaaaaaasssss going to build my own 5a3 as described in a different thread when a handwired 5b3 popped up on ebay and I just had to pounce.

1953 Deluxe 5B3 Reproduction Amp Head 2 Channel 6V6 6SC7 Handwired 15 Watts | eBay

50's power tranny
15w
4/8/16 output
ppimv, tone, chan 1 vol (mic), chan 2 vol x 2 (instrument)


The amp is handwired in the way that the Speed Shop charges extra for for their 5e3. The builder Brett has been doing tv/stereo repair since 1968 and has quite a story and was super friendly. The amp arrived promptly in 2 days and fired right up with the tubes that came with it. For those of you not familiar the early Tweed used octal 6sc7 preamp tubes which don't have the gain as 12ax7 but have their own thing going. I do have 12ax7 adapters which I may do a separate vid.

Long and the short it is a tone a fun with a knarly vintage vibe and the value is unreal. The speaker pairing if very important and can either get you more typically raunchy tweed or nicer cleans but she ain't doing metal or crystal cleans.














My friend Tony jamming on it
[ame]http://www.youtube.com/watch?v=mSvOSaRf-do[/ame]

with JJ 6v6s
[ame]http://www.youtube.com/watch?v=zM_-gWkeqks[/ame]

with NOS GE 6v6GT
[ame]http://www.youtube.com/watch?v=594zCo2bShk[/ame]


Demo through vintage and weber 10s

http://www.mylespaul.com/forums/squawk-box/342615-weber-vs-vintage-demo.html



In closing watch Brett's shop or drop him a line if you think you want something built.
 

Quill

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That's awesome. Love that amp!

You're just great at whipping up these quick videos. I've only got time to listen to the first one right now - of course the break-up is wicked but the clean sound with that nice Les Paul is really fantastic. Your pal is a good player, too.

"Why do you always get the best f**king amps?" Indeed! :laugh2:
 

neils

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Very cool. Love that. I had an Octal Champ clone for a few years. Shoulda kept it. Mine was built by Carls Custom Amps (he does or did a 5C3 octal) but I'm gonna keep my eye on this guy who built yours.

The Octal tubes have a sound. Im always drawn to that sound. I'd love a BC Audio someday

Nice demo

Neil
 

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Very cool. Love that. I had an Octal Champ clone for a few years. Shoulda kept it. Mine was built by Carls Custom Amps (he does or did a 5C3 octal) but I'm gonna keep my eye on this guy who built yours.

The Octal tubes have a sound. Im always drawn to that sound. I'd love a BC Audio someday

Nice demo

Neil
Something magical and thick about them. I may do a quick demo at some point with the 12ax7s but this amp really is what it is. Also it takes pedals well which I had heard otherwise though some metal 6sc7 can be noisy supposedly.
 

InsertUsernameHere

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Very cool. Love that. I had an Octal Champ clone for a few years. Shoulda kept it. Mine was built by Carls Custom Amps (he does or did a 5C3 octal) but I'm gonna keep my eye on this guy who built yours.

The Octal tubes have a sound. Im always drawn to that sound. I'd love a BC Audio someday

Nice demo

Neil
I had a 5C1 built by Cygnus (Kevin), and that thing was FAT! Sounded huge through a 2x12. I've got some iron, and I'm thinking about designing a 5C1ish circuit with 2x 6SJ7s and an EL84.

HNAD, sounds fantastic!
 

neils

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Nah, 5C1-ish with a KT66 Now your talking. Come on, Octal pre and KT66?

OH wait, that ould be a BC Audio #10?

With my Emery Superbaby no matter what I try I keep going back to a 5Y3/KT66 combo. Thick with lots of give. I must say since the OT was replaced and upgraded I really like a KT88. They are both under loved tubes.

Neil
 

InsertUsernameHere

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Nah, 5C1-ish with a KT66 Now your talking. Come on, Octal pre and KT66?

OH wait, that ould be a BC Audio #10?

With my Emery Superbaby no matter what I try I keep going back to a 5Y3/KT66 combo. Thick with lots of give. I must say since the OT was replaced and upgraded I really like a KT88. They are both under loved tubes.

Neil
I would but I've got an octal power amp. Besides the OT is perfect for a single ended EL84
 

bulletproof

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Thats a beautiful sounding amp,brother!! :thumb:
 

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Well after losing access to my brother's wood shop (stupid baby) I had Weber take a shot at a 5b3 cab in as close to size specs but with a 1x10 baffle (12in looks like it would fit too).

Original





Weber (badge is just taped on for now)










oh and I rehoused the amp in a 5c3 chassis





made a mounting plate for the vintage PT



perfect fit






Now I am testing which 10 will reside in it and tweaking some internal mods.

http://www.mylespaul.com/forums/squawk-box/342615-weber-vs-vintage-demo.html
 

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[ame]http://www.youtube.com/watch?v=IZYWfc-jQlg[/ame]

After this I added another 250pf parallel (not in diagram) to the bright channel to really brighten it up.



Once loud there is a ton of bass even with a 10 but at low volumes it is the perfect practice amp.

Please note the 10w resistor is needed due to the vintage PT transformer but not for the model specific ones.







Some fun times in the in-laws house

 

Splattle101

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I really like what you've done with this amp. Octal preamps, grid leak biased, into a dirty old Deluxe power amp with the standard no-regulation, saggy-arse power supply. I also like the PPIMV in this.

The 6SC7s are an interesting valve. The individual triodes are similar to what you'd get with a good 5751. However, they share that cathode. Lots of fun to be had jumping inputs.

I like the look of it in the wide panel cab, too. Awesome stuff. :d :thumb:
 

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Last demos....alternate view of the previous demo shows how quiet it can get
[ame]http://www.youtube.com/watch?v=30r6Uh7KbZc[/ame]

At home demo though this amps overall tone is tough to pic up with the mic. This time with the alnico 10a125 which does compress more.
[ame]http://www.youtube.com/watch?v=Spf9niW4QkM[/ame]


Better recorded cleans in the first half of this before I rechassis'd and put it in the combo
[ame]http://www.youtube.com/watch?v=77v4WXtGNo8[/ame]
 

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Thought I would post this in case anyone goes down this route. P10r is usually the speaker used in the Havard vs the P12r in the Tweed Deluxe. Amp is on the classifieds.

[ame]http://www.youtube.com/watch?v=R0vn9y1ghJc[/ame]
 

Bill Hicklin

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That's a modified 5B3 circuit. The originals used grid-leak biasing for the input stage; the tip-off is a pair of great honking 5 meg resistors between the grids and ground. Also the jack resistors were 75s, not the familiar 68s.
 

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That's a modified 5B3 circuit. The originals used grid-leak biasing for the input stage; the tip-off is a pair of great honking 5 meg resistors between the grids and ground. Also the jack resistors were 75s, not the familiar 68s.
Yes it has several mods including a ppimv, some bright cap changes, and some component changes to make the vintage iron work with the amp.

I used this as a reference when I rechassied
 


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