Input on chassis layout please

[hokenpoke]

A couple of friends and I are combining efforts on 3 more-or-less identical 5E3As with chokes and VVR.  Since I have to do the final assembly and integration of the chassis, I was looking to give myself a little more room to work with than the standard tweed deal.  What I have in mind is Marshall-y kind of deal that is 20x8x3 - super roomy for this kind of thing and works real well with the cab we've designed.

I worked up this design and was wondering if I could get some feedback.  I wanted to place the transformers/choke near where they were needed but also keep them away from each other and the pre-amp tubes.  This looks good to me though the run for the heater string from the pilot light will obviously be pretty long.  What do you think?

[kagliostro]

What about moving the choke more near to the PT and V1 / V2 near the input ?

Kagliostro

[hokenpoke]

The choke is very near where it is supposed to be so I would be inclined to leave it there.  I could shift V1 closer to the input to shorten the run from the input jacks.  V2 is reasonably close to where it connects on the board.

What about putting the rectifier 'in front' of the PT?  That would make the runs from PT>rectifier>Standby>VVR very short.  Or is that a dumb idea?

[kagliostro]

What about putting the rectifier 'in front' of the PT?

To me that isn't a bad idea, short AC wires around the chassis is a good idea

Kagliostro

[Willabe]

If that is going into a head cab. and you put the rec. tube up front, then your going to have a problem with heat build up in the cab.

You'ld have to add venting up front by the rec. tube to let air flow by the tube and draw out the heat from the inside of the cab.


                      Brad      

[archaos]

If that is going into a head cab. and you out the rec. tube up front, then your going to have a problem with heat build up in the cab.

You'ld have to add venting up front by the rec. tube to let air flow by the tube and draw out the heat from the inside of the cab.


                      Brad      

+ 1 Yep, that's a hot biased amp, & you might cook everything inside the cabinet w/o vents. Do add large vents.

[hokenpoke]

Vents: check!

[hokenpoke]

This should be cleaner.  Will have (hopefully) adequate ventilation.

Anyone have any suggestions about how much room to leave above tubes in a solid wood cab?

[Willabe]

Anyone have any suggestions about how much room to leave above tubes in a solid wood cab?

Well heat rises, but I think the sides of the tube are the hottest part. And the hottest part on the side is where the tubes plate seems are?

Still depends on fresh air flow.  I would think at the very least an 1", of coarse more would be better.