T31/4
Bayonet Lamp
Solid-State White LED
Lamp illumination
Replaces all
incandecent 6.3VAC or 12.6VAC
(Voltage Range is +/- 2.5VAC of above values)
T31/4 Style Bayonet based Incandecent Light Bulbs.
(Voltage Range is +/- 2.5VAC of above values)
T31/4 Style Bayonet based Incandecent Light Bulbs.
As I further my development into LED light replacements for
older T31/4 based incandecent lamps I can now
offer three white style replacements. Presented in two
standard AC voltage ranges most often seen in vintage radio or audio
equipment. Other voltage levels from
2VAC through 15VAC can be built upon request by emailing me at the link
below.
Why
replace incandescent lamps in older radios and electronic
equipment?
- The life of an LED is long, typically 80,000-100,000 hours (almost 10 years of continuous power), and most of us will never experience one going out.
- You will save on current draw! The LED lamps only requires about 15mA whereas the original incandescent lamps can easily draw 100-200mA current. Less current draw results in less heat in the old power supply.
- Less heat! LED’s run much cooler than light bulbs. Often light bulbs will “yellow” heat damage white illuminated display areas due to close proximity. This will not happen with an LED!
- Lamps are in difficult replacement locations. Often radios will require some disassembly of covers or shields to access lamps for replacement. Also, connecting wires can be damaged in tight areas. Thus we often see lamps that have long ago burnt out remain dark due to replacement difficulties. LED replacement lamps can provide a replace once solution!
- Provides a cleaner look. Since incandescent lamps emit light nearer to the red side of the optical spectrum they will light with a yellow glow. So when lighting white material it will still show up yellowish. These LED lamps are pure white light, so white lettering or background will illuminate white!
- The life of an LED is long, typically 80,000-100,000 hours (almost 10 years of continuous power), and most of us will never experience one going out.
- You will save on current draw! The LED lamps only requires about 15mA whereas the original incandescent lamps can easily draw 100-200mA current. Less current draw results in less heat in the old power supply.
- Less heat! LED’s run much cooler than light bulbs. Often light bulbs will “yellow” heat damage white illuminated display areas due to close proximity. This will not happen with an LED!
- Lamps are in difficult replacement locations. Often radios will require some disassembly of covers or shields to access lamps for replacement. Also, connecting wires can be damaged in tight areas. Thus we often see lamps that have long ago burnt out remain dark due to replacement difficulties. LED replacement lamps can provide a replace once solution!
- Provides a cleaner look. Since incandescent lamps emit light nearer to the red side of the optical spectrum they will light with a yellow glow. So when lighting white material it will still show up yellowish. These LED lamps are pure white light, so white lettering or background will illuminate white!
Offered in Three Styles Diffused  The emission from this lamp is very smooth and was designed for rear illumination of a semi-translucent scale or where limited illumination below the lamps base is required. Such as those used for frequency logging on radios. Typically this is a milky white plastic that is lettered in black or other dark color. When illuminated from the backside the material will glow to allow the printed characters to be seen in low room light conditions. Since this lamp has light emission that extends below the base it will allow good illumination when mounted at right angles to the area of interest. The lamps dispersion lens is milled from solid semi-transparent plastic. It is not a hollow plastic covering! By using a solid lens material the emitted light is dispersed a full 360 degrees around the lamps sides and below the bayonet base line just like an incandescent lamp. The diffusion lens requires an opening of 1/2 inch to facilitate the lens diameter when used in situations where the lamp is set through a chassis or cabinet hole. Uses: - Rear projection of semi-transparent glass or plastics such as the frequency readout dial assemblies used in Collins S-Line equipment or the Swan 350/500/700 series radios for example. - Side mounted lamp sockets which may require light illumination below the base of the lamp. An example would be a meter which is illuminated from the top, but has a lamp socket that is side mounted. Wide Angle  Using a
low profile 5mm clear lens LED this lamp finds its use where a large
angle of high intensity light it required. This lamp finds
use when side lighting a dial
display on a radio. Most often these frequency readout dial
assemblies are made of metal or solid plastic plate. The
lettering is then printed directly onto
this plate. llumination
of these dial assemblies is then achieved via incandescent lamps
situated
around
the periphery of the plate, yet hidden by the front panel.
These lamps offer a dispersion angle of about 100 degrees.
Uses: - Side flood illumination. Frosted  A soft
diffused illumination similar to my larger diffused lens lamp
above with a smaller beam area toward the top of the lamp.
The actual illumination angle is between 55 and 65 degrees.
Uses: - Internally lit meter lamps. - Close proximity and tight area illumination. I use similar lamps on the Drake 4-line equipment for meter illumination either via the front or side of lamp. |
These
are not mass produced lamps. Each lamp is hand
assembled in my shop. The bayonet bases are solid
brass. Click on the picture below to see
examples of white LED replacement lamp installations and a table of our
ever growing manufacturer/model replacement list.
Click Above for Examples
Click Above for Examples
Questions? Click on the
link below for those often asked questions. Email me if you don't
find the question or answer that suits your needs.
Simple to Install
Installation is straight forward and every attempt was made for ease of installation. These are direct lamp replacements and installation should be no more difficult than a normal lamp replacement
Ordering
All lamp orders
will ship @ $4.80 (Any Quantity) for USPS Priority Shipment to
U.S.A.
locations. For destinations outside the U.S.A. you have a
choice of Standard Airmail @ $10.00 USD (1-6 weeks delivery time)
or International Priority Mail at $37.00 USD ($23.00 for
Canada/Mexico) (1-2 weeks Delivery time). Shipment selection is
available using the on-line PayPal order system below upon final
checkout.
or Send Check or Money Order (US Funds Only) to:
D.A. Buska Engineers LLC
4805 64th Avenue
Kenosha, WI 53144 U.S.A.Include
quanitity
and Part Numbers (see below) with your payments made via standard mail
orders. Don't forget to include postage as described above.
For immediate processing we accept payments through PayPal when using the PayPal Order Cart below. You can change the order quantity if desired when you view the cart during check out.
| Part Number |
Price
(Ea) |
Range and Radio |
Add to Cart |
| LPW-DIFFU6 |
$12.00 |
6.3VAC
LED Diffused Lamp |
|
| LPW-DIFFU12 |
$12.00 |
12.6VAC
LED Diffused Lamp |
|
| LPW-WIDEA6 |
$11.00 |
6.3VAC
LED Wide Angle Lamp |
|
| LPW-WIDEA12 |
$11.00 |
12.6VAC
LED Wide Angle Lamp |
|
| LPW-FROST6 |
$10.00 |
6.3VAC
LED Frosted Lamp |
|
| LPW-FROST12 |
$10.00 |
12.6VAC
LED Frosted Lamp |
