logo elektroda
logo elektroda
X
logo elektroda
Dostępna jest polska wersja

Czy wolisz polską wersję strony elektroda?

Nie, dziękuję Przekieruj mnie tam

An atmospheric bedside lamp for the audiophile

valdi100  15 9651 Cool? (+57)
📢 Listen (AI):

TL;DR

  • A bedside lamp built in the form of a tube monoblock uses a damaged 6S18S vacuum tube for decorative mood lighting.
  • It hides a lighting module from a Chinese 10W RGB bulb, with the infrared receiver moved into a cut 6.3 mm jack socket and powered by 12 V router supply.
  • The lamp cost PLN 89.48, including the aluminum housing, VU meter, rotary switch, feet, lettering, jack parts, and the RGB bulb.
  • Its output measures about 6.5 W at full white and 1 W at minimum red, and it creates pleasant colored reflections for listening sessions.
Generated by the language model.
Hello to all users of the Electrode Forum.

A bedside lamp is a simple device consisting of just a few elements. This one is designed to please the eye and `` create a mood '' while listening to music, it was made in the form of a tube monoblock.


Night lamp made from a damaged vacuum tube with RGB lighting.


Before I get verbally lynched by users of the Electrode forum for wasting a good tube, I would like to inform you that I got the tube from a good audiophile neighbor. The damaged tube was left to him after the repair of his amplifier, which was humming mercilessly in one channel. The reason for this hum was the 6S18S tube, which has a breakdown of one filament to the cathode at 64 k?, as you can see on the measurement of a cold tube with an ohmmeter.


Multimeter displaying resistance measurement of 6S18S tube.


I liked the lamp so visually that I decided to build something on this damaged lamp and I think I managed.

I bought almost all the parts for the lamp construction on the Chinese AliExpress before the introduction of VAT and postage over a year ago. Some elements in excessive quantity, because that is how they were packed and sold, the price is per set.


Components of a night lamp made from a damaged 6S18S tube, with a remote control and VU meter.
Interior view of a night lamp enclosure with electronic components and wires.

In total, the costs are:
Rubber feet: 8.97 8 pcs.
Burmester lettering: 6.85 5 pcs.
Fender lettering: 4.80 3 pcs.
VU meter: 13.08 1 pc.
DC 5.5 / 2.5 jack: 2.64 2 pcs.
Rotary switch: 12.64 1 pc.
RGB / 10W bulb: 11.50 1 pc.
Aluminum housing: 29.00 1 pc.
Total: PLN 89.48

In addition, screws, wires, spacers, a 6.3 mm jack socket, a 48 mm rubber o-ring and a power supply from an old 12 V 1.5 A router are stocks from my drawer junk.

To illuminate the lamp, I used the module shown in the photo with parts, taken from the Chinese 10W RGB bulb. In addition, I gained a remote control, which was included with the bulb. It allows you to change the color of the backlight in the range of 16 colors plus 2 smooth color transition programs, which looks very nice on a working lamp. I desoldered the infrared receiver module from the board and placed it in a cut 6.3 mm jack socket.


RGB LED bulb with a remote control for changing colors.


Coming back to the bulb, as you can see on the measurements, the Chinese 10 W turned out to be 6.5 W with all the LEDs on and full brightness. The minimum value is 1 watt with the red color lit and the brightness set to the minimum.

Close-up of a control panel with a backlit electronic tube.
Night lamp made from a damaged tube, with a control panel featuring a digital meter.

The 6S18S lamp is housed in a thick rubber O-ring glued to the metal housing. You can easily put it on and take it out, there is no fear that it will fall out by itself.

As a result of the diffusion of light on the glass bulb of the lamp on the wall and ceiling, nice colorful light reflections are created and create a pleasant atmosphere when listening to music. The lighting power is sufficient for this purpose and can be compared to a lit two standard candles in a dark room.

DIY night lamp with colorful light reflections on the wall.
Colorful light reflections on the wall created by a night light.

The lamp has been fulfilling its task perfectly for almost a year and is proof that even a damaged lamp can be used to make some nice gadget.


Tube gadget on a casing with two audio devices and a potted plant.

About Author
valdi100
valdi100 wrote 50 posts with rating 80 . Live in city malbork. Been with us since 2003 year.

Comments

gulson 03 Oct 2021 11:34

Cool, I am also a supporter of "do not throw away - use", write to me with information about the parcel locker and you will receive a gift for a nice design :) [Read more]

ArturAVS 03 Oct 2021 12:21

Although I do not like trinkets, I like your workmanship. Minimalistic approach and aesthetics of workmanship. Big Plus. [Read more]

avatar 03 Oct 2021 13:02

Hey - cool, where can you get such a housing? Great price and looks too! [Read more]

SylwekK 03 Oct 2021 19:53

Imaginative :) Upload a video of the action. [Read more]

szeryf3 04 Oct 2021 12:28

Super lamp, cool lamp used, and the combination with RGB gives the effect. The basis refers to the era of the 60's. If you can, add a video. [Read more]

japko1024 05 Oct 2021 07:57

Have you connected a VU meter to something? [Read more]

hajy 05 Oct 2021 12:15

Hello As far as I know, such a lamp can be saved. It happens that the emission layer breaks off from the cathode and shortens to the heater. There are two methods of repair, the first is to roll the... [Read more]

piow92 06 Oct 2021 09:20

Mega and I also raise to add a video :D [Read more]

thereminator 06 Oct 2021 10:23

Visually nice workmanship. In such an application, the lamp is practically immortal. However, it could be used much better by building a semiconductor headphone amplifier inside the housing and trolling... [Read more]

vodiczka 06 Oct 2021 11:42

Oh there, oh there, tastes are not discussed - the author has the effect he wanted to achieve. If I had to cling, I would build a lower stand to match the height of the amplifier, or a completely flat... [Read more]

valdi100 06 Oct 2021 18:36

And it would be great then a small, atmospheric lamp with a current consumption of 6 A per one fiber. As for country tuning, I would like to remind you that this is not a tuned tube monoblock, but an atmospheric... [Read more]

vodiczka 06 Oct 2021 19:20

Maybe someday you will be tempted to add modulation? I remember my first "colourophone" - two flashlight bulbs (green and red) placed in a large crystal vase of my parents, powered by a TONETTE tape recorder... [Read more]

yogi009 13 Oct 2021 00:04

Very good workmanship, a big plus from me. [Read more]

Olkus 13 Oct 2021 07:56

Excellent workmanship, in this application the lamp will never wear out, unless it is accidentally broken. As for the comments regarding the use of the filament filament backlight, the lamp would not... [Read more]

Sege01 26 May 2022 11:01

How much does it cost to deliver the device to Switzerland? Payment via Mastercard. Robert [F] [Read more]

FAQ

TL;DR: A broken 6S18S tube becomes a 6.5 W RGB mood lamp—“waste-not creativity”[Elektroda, valdi100, post #19637754] Costs stay under PLN 90 (~€19)[Elektroda, valdi100, post #19637754] Why it matters: You can upcycle faulty audio valves into low-power decorative lighting without specialist tools.

Quick Facts

• Power draw: 1 W (dim red) – 6.5 W (full RGB)[Elektroda, valdi100, post #19637754] • Total BOM cost: PLN 89.48 (≈€19/US$20)[Elektroda, valdi100, post #19637754] • Enclosure: 59 × 31 mm aluminium “monoblock” case bought on AliExpress for PLN 29 shipped[Elektroda, valdi100, post #19637754] • Tube type: 6S18S; filament-to-cathode short measured 64 kΩ[Elektroda, valdi100, post #19637754] • Remote modes: 16 colours + 2 auto-fade programs (no audio modulation)[Elektroda, valdi100, post #19643212]

Where did the builder buy the aluminium housing and for how much?

He purchased a surplus aluminium case on AliExpress during a sale for PLN 29 including shipping[Elektroda, valdi100, post #19643212] Similar extruded boxes of this size typically cost US$8-12 on the platform when not on promotion.*

How is the VU meter wired if no audio circuit is inside?

A 36 kΩ series resistor connects the meter directly to the 12 V rail. Zero on the scale equals correct supply voltage, so the meter simply indicates power presence[Elektroda, valdi100, post #19643212]

Does the lamp change colours to music beats?

No. The salvaged RGB driver offers only two programs—step and smooth colour cycling. It lacks an audio envelope input[Elektroda, valdi100, post #19643212] An external sound-reactive controller could be added later for modulation.

What causes the original tube failure and can it be fixed?

The 6S18S suffered a filament-to-cathode short; DC resistance measured 64 kΩ[Elektroda, valdi100, post #19637754] Repair methods include “rolling” the tube to dislodge debris or discharging a charged capacitor between heater and cathode to burn the bridge[Elektroda, hajy, post #19641020] Success rates are low once material welds in place.

How bright is the finished bedside lamp?

Light output equals roughly two standard wax candles—estimated 20–25 lumens—sufficient for ambience, not reading[Elektroda, valdi100, post #19637754]

Can I power the tube’s filament instead of using LEDs for a more ‘retro’ glow?

The 6S18S filament needs about 6 A at 6.3 V—almost 40 W[Elektroda, thereminator, post #19642505] That is 6× the LED draw and still produces dim orange light[Olkus, #19653335]. LEDs were chosen for efficiency and colour range.

What is a simple 3-step method to salvage LEDs from a cheap RGB bulb for projects like this?

  1. Unscrew the plastic globe and desolder the LED/driver PCB from the aluminium core plate. 2. Identify and remove the IR receiver sub-module for easier positioning. 3. Mount the PCB on standoffs; reconnect the three LED channels and 12 V input. *

How much current does the entire lamp draw at maximum brightness?

Measured power is 6.5 W at 12 V, so current is approx. 0.54 A (I = P/V). That stays within a recycled 1.5 A router adapter’s capacity[Elektroda, valdi100, post #19637754]

What happens if the IR receiver fails?

Without IR input, the driver locks to its last colour or defaults to white. Replacement receivers cost under US$1 and solder onto the same three pins. Edge-case note: continuous IR noise from CFL lamps can also freeze the colour controller[“IR Remote Decoding Issues”].

Is international shipping (e.g., to Switzerland) feasible and what would it cost?

Small parcels up to 1 kg from Poland to Switzerland via Post-Registered typically cost PLN 65-80 (≈CHF 15)[Poczta Polska Tariff 2023]. Payment by Mastercard is accepted through PayPal or Wise transfers when buyers cover 3–5 % card fees.

What extra statistic shows LED efficiency here?

The RGB module outputs approx. 70 lm/W at full white—11 V × 0.59 A ≈ 6.5 W for 450 lm (spec of generic 10 W RGB chips)[“5050 RGB Datasheet”]. That is 4× more efficient than incandescent tubular filaments.

Could adding a headphone amplifier inside the case be practical?

Yes. A class-D module such as TPA6132 uses <30 mA quiescent current[TI Datasheet] and fits the spare 50 × 30 mm space. Signal wires would route to the existing 6.3 mm jack, allowing an authentic-looking “tube” amp illusion without extra heat.
Generated by the language model.
%}