Vibrolux Reverb build - AA964

[HowardND]

Hi all, long time lurker and first post. I'm Howard from Essex, UK.

I'm not an experienced amp builder, having built just a single 5E3 before this Vibrolux project. I'm having an issue getting to Photobucket at present but I'll post pics of the 5E3 build if anyone is interested. I'm a long time regular poster on the Heritage Owners' Club forum and the 5E3 build was detailed there.

Anyway, to the point: my PTP build is to be based on the AA964/AA864 layout but I can't find a decent, modern layout diagram on the web. I'm looking for something like the Weber layouts, e.g.



If there is no better layout available, I'd be happy to use the Weber 6A40 as a basis for my build. I know the 6A40 is more Super Reverb oriented but aside from the transformer differences, are there many other areas I'd need to take into account?

Be gentle with me

Thanks,

H

[loudthud]

Here's a link to the AA964:

http://www.el34world.com/charts/Sche...a964_schem.pdf

[HowardND]

Thanks loudthud, I've seen many copies of this and all are illegible at various places. For instance, can you tell what value the cap on the bass pot should be on the layout?

Weber, Tube Amp Doctor and others produce their own layouts - I just wondered whether the Weber 6A40 layout was close enough to the AA964 with a few minor component value changes. It seems to be very close but maybe I'm missing something.

[frus]

you mean the resistor. if you're not sure, look at the schematic. it says clearly, 6800

[HowardND]

you mean the resistor. if you're not sure, look at the schematic. it says clearly, 6800

Yes, apologies - I was going from memory on the cap/resistor issue.

However, the point I was making remains: the Fender AA964 layout/schematic is a very old document which has been repeatedly copied to the point where certain things are difficult to read on either of them.

Have you seen a modern version of either document such as the Weber 6A40 layout I posted?

[pdf64]

What is the problem with the Weber layout? The mid cap values are different but there's likely another Weber model with the right values, if that's all it is.
Every BF Fender with reverb is pretty much the same, in terms of layout?
Pete

[HowardND]

Hi Pete, thanks for getting involved The 'problem' is what I'm trying to establish

I can only see minor differences when I compare the AA964 layout with the 6A40 layout, it amounts to a few component value changes as far as I can tell. Those items plus the differences in the transformers seem to be all I need to rework.

I just wanted someone with experience of this - or a better eye than mine - to point out anything I may have missed.

Thanks,

H

[Jazz P Bass]

Just a thought.
Would you not be better off consulting the actual schematic diagram?
Layouts are o/k for, well, laying an amp out.
The schematic is the 'Bible'.

[HowardND]

Yes, and I will, in conjunction with the layout