BOX in the making

[tinitus]

Hi,
though I'm building this box for a Pass B1 pre, it is very tempting to use it for small TUBE amp instead

if anyone else are interesting in showing their box stuff her, please do

[roline]

Some assembly required; take part A,(wrong size), insert in part B,(not included), use instructions (in Latin) if all else fails. Help line is "Dial a Prayer"...
I do a 3 sided box with removable back. All sides slotted for the top plate to slide into place. Also bottom plate can slide into place. No screws from top or sides. Corners are 45 deg, back held in place 2 screws on each side.
I use a forsener bit to drill the recesses in the front or through hole for the amp gage and nixie tube. Also use it to recess the back side to get the front to the correct thickness for the power switch, volume pot, phonojack input for MP3 and bias switch.
The aluminum top plate is more of a challenge to slot the vent holes on a mill with centering jig at the tube centers.
Lots of sanding , a little stain and 7 coats of tung oil....
The top plate is assembled as far as possible and then slid into place for the final wiring to the front and back. Add tubes, fuse, power, input, speakers and cold beer, power up and adjust bias, crank it up...... AHhhhhhhh

[TheGimp]

I like the copper.

[VictoriaGuy]

Originally Posted by roline

and nixie tube.

Nice work.
What's the nixie for?

[TheGimp]

Probably to indicate which tube is showing bias current on the meter.

[roline]

The nixie just shows what tube is displayed on the amp meter.
6 position dual pole; to the nixie nc, 0,1,2,3,4 and to the meter nc, nc, 1,2,3,4

I bought a dozen nixies because they are cool, had to find something to use them for.

[roline]

The first 2 in the series, 1 more on the way...
First was 6JN6 based, 2-25watt
2nd was 6GV5 based, 2-40watt
The next is 6LB6 based.. 2-60watt currently doing the sheet metal and wood work.

[BillEpstein]

Nothin' like Nixies here just some Padauk and shellac for the finished amp; the unfinished pre-amp chassis' native walnut will get Natural Watco, then shellac. The amps top plate is powder coated 1/8" aluminum, the pre-amp and all subsequent plates will get anodized. Powder coat smudges and marks just from dusting. Who knew?

[roline]

A dedicated headphone amp, Hybrid circuit tube 1st and 2nd stage with a Mosfet class A follower for low impedance drive capability. Just got the box glued up, prior to the sanding marathon, staining and 8 coats of tung oil. This Amp is designed to be the base unit under either of the power amps above, same foot print. It uses the same compactron triple triode as the first and second stage in the power amp. There are more than 5 compactrons that can be swapped out, Ive tried the 6u10, 6ac10, 6ak10, 6av11 and 6d10.
After I through an extra winding on the toroid that I had, I found an Antek that was a direct drop in. just slightly larger in size
I tried to cut a piece of glass for the window, with little success. Decided to use a piece of lexan instead.