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Post subject: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Dec 31, 2010 11:18 pm
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Hey Arjay (or anyone else), other than an apparent difference in the vibrato section circuitry & the use of the 12AY7 (one of my most favorite tubes).... anyone know or more importantly know the tonal difference between the tweed Vibrolux and Tremolux circuits? (see links for schemos). Seems the depth portion is tapped off different parts of amp (?).

I've only played on a "real" tweed era Tremolux. And still inclined to mod my SF Princeton back to this circuit.

Thanks! In advance. And have a GREAT New Years!


Vibrolux:

http://www.prowessamplifiers.com/schema ... matic.html


Tremolux:


http://www.ampwares.com/schematics/tremolux_5e9a.pdf


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Sat Jan 01, 2011 2:04 am
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I've always regarded those amps as sonically equivalent, with the principal difference being the speaker complement -- 1 x 12 in the Tremo, 1 x 10 in the Vibro (or is it the other way around?).

I've only played a tweed Tremolux once, and that was many "yarhen" ago.

Arjay

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Sat Jan 01, 2011 8:34 am
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Electronically, on the 5F11 the modulation is on the power stage biasing voltage (similar to AA964). On the 5E9, it is on the kathode of phase inverter, I'm not sure about how it works, if I've time I will simulate the stage. (Maybe 5E9 is more linear due to the fact that the power amplifier is not under biased --> I changed after having reflected). Finally I prefer 5F11, the modulation is apply at the end of the amplification chain.
8)
Happy new year to all.

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Last edited by Tis-san on Sat Jan 01, 2011 3:33 pm, edited 2 times in total.

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Sat Jan 01, 2011 9:58 am
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That's a pretty concise comparitive assessment of those two circuits, Tissan.

+1

Arjay

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Sat Jan 01, 2011 10:10 am
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Thanks guys! One other thing, if it makes any difference, both circuits are cathode-biased, Class "A" topos. No negative voltages, at idle at least.

EDIT: I just found my boo-boo. Sorry. This Vibrolux is FIXED BIASED. So there is a negative voltage on the grids. I'm not sure if any Vibrolux's of this era were cathode biased. I can't remember how the vibrato sounded on that Tremolux that I played on so many moons ago. I just remember the overall tone was to die for. And have been hunting for this elusive tone ever since.

Have a GREAT New Years!


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Mon Jan 03, 2011 6:29 pm
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I have a 5G9 Tremolux (1958). It's fixed bias with long-tailed PI (think Bassman). If you have any questions, let me know :)

Here's a document you might find interesting: http://www.mercurymagnetics.com/pages/news/ToneQuest/_2007/TQRJUN07.pdf

My T-lux:
Image

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Mon Jan 03, 2011 7:07 pm
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mr.danny wrote:
My T-lux:
Image


GORGEOUS!

(hand salute)

Arjay

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Mon Jan 03, 2011 7:45 pm
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Retroverbial wrote:
GORGEOUS!

(hand salute)

Arjay


Honors go to John Mergili for the re-tweed!
http://www.mergili.com/

I bought it with a crummy re-tweed and extra holes (see pic) so it needed re-re-tweeding!
Image

John actually does extensive cabinet rehab in the process of re-tweeding. Re-doweling stripped holes, fixing cracks, etc, are all part of his basic service. The narrow panels themselves are susceptible to rattles if not firmly fixed in place as they take stress and vibration from the baffle board/speaker. Thanks to John she's good for another 60 years.


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Mon Jan 03, 2011 9:12 pm
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Great looking amp. I'm specifically looking for a cathode-biased, Class "A" dual-6V6GT amp. I have several fixed-biased 6V6GT beasts (one BF Deluxe, more than one Princeton Reverb, if you know what I mean). :wink:

I am going to run Mercury Mags in the amp, as the OEM ones are fried, shorted, rusted all the way through from being in the back yard garage for years no good. This will be kinda a DIY deal.

Do you run 5Y3GT or 5V4G rectifier in your Tremolux?

I would LOVE to own a tweed Tremolux or Vibrolux. Maybe one day... I remember playing on that old Tremolux. MUY SABROSO! Very addicting!

Do you have the website of that guy that restores tweed cabs? If it's in the linked article, I'll check it out as soon as I get back from work.

http://www.kbapps.com/audio/schematics/ ... ux5g9.html

Thanks! Keep the Blues alive.


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Tue Jan 04, 2011 8:42 am
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BMW2002Ti wrote:
Great looking amp. I'm specifically looking for a cathode-biased, Class "A" dual-6V6GT amp. I have several fixed-biased 6V6GT beasts (one BF Deluxe, more than one Princeton Reverb, if you know what I mean). :wink:.


Well, I"ve played those amps & I'm here to say they don't sound like a T-lux, but you're the only fella who's winked at me all day :)

BMW2002Ti wrote:
Do you run 5Y3GT or 5V4G rectifier in your Tremolux?


5U4

BMW2002Ti wrote:
Do you have the website of that guy that restores tweed cabs? If it's in the linked article, I'll check it out as soon as I get back from work.


http://www.mergili.com/


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Aug 12, 2011 3:00 pm
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The visual vibe is certainly similar......have you compared the schems?

Kewl amp, BTW -- I dig the "crystal" handle.

8) 8) 8)

Arjay

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Aug 12, 2011 3:15 pm
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Retroverbial wrote:
The visual vibe is certainly similar......have you compared the schems?

Kewl amp, BTW -- I dig the "crystal" handle.

8) 8) 8)

Arjay


Thanks Arjay. I accidentally deleted the post where I asked the question that you answered(below).

I got this 1960 Gibson amp last month. It sounds more like a Fender amp than most
of the Gibson amps I have heard before.I was wondering if this was Gibson's copy
of a Fender Tweed amp like a Vibrolux or Tremolux?

Image

Image

Image


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Aug 12, 2011 3:22 pm
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Weird (my response seems to be out of sequence).

:shock:

What's the tube complement look like, TT6?

Arjay

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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Aug 12, 2011 3:41 pm
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Retroverbial wrote:
Weird (my response seems to be out of sequence).

:shock:

What's the tube complement look like, TT6?

Arjay


Sorry,it was my fault because I deleted the post while you were answering.
Anyway,here are some gut shots from the Telecaster forum. It is not my amp
but it is the same model owned by markr1. His is a '59 and mine is a '60 so I think
they are basically the same(except his is in better condition).

Image
Image
Image
Image
Image
Image
Image
Image


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Post subject: Re: Tweed Vibrolux versus Tremolux circuits
Posted: Fri Aug 12, 2011 4:31 pm
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I'm thinking it prolly sounds like a 1 x 10 version of a 5E3 but with bias-wiggle trem.

Nice!

Arjay

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