This is not only normal, it's a requirement of tube operation. This glow normally comes from the tube's heater, or filament, which heats the cathode so that the tube conducts properly. If you don't see this, and your amp doesn't seem to be working properly, check the amp in the dark (some tubes, esp. Sovtek 12AX7LPS tubes) have a filament glow which is very difficult to see. If you still aren't sure, let the amp warm up for a few minutes. Then, place a fingertip near each tube in turn.

Have a careful look. If there are patches of blue glowing on the glass, probably with fairly sharp edges, it's due to electrons missing the anode and hitting the glass instead, making it flouresce. (Most of the tube envelope may even glow. -ed) Quite pretty, and you can play for hours, moving the patch with a magnet... (Don't electrocute yourself!) This kind of glow is common with beam tetrodes and is completely harmless. (This type of glow is by far the most common.

First, read the orange glow question above. Is the color you're seeing orange, coming from the top and bottom of the tube's "guts"? If so, you're OK. BUT... if the plate, or any part of it, especially in a power tube, is actually glowing red (even a faint red) shut the amp off at once and find out what the problem is. Otherwise, you will certainly destroy the tubes. You could also destroy other parts of your amp, resulting in a huge expense to repair it.

No. Common self tanners can produce unnatural looking colors, mostly orange. This is not the case with our sunless tanning spray thanks to our unique constellation of self tanning substances.

You need to alter the white balance settings on your camera. This tells the camera what lighting conditions you are working in. If your camera supports it, the best setting to use is the custom or measured white balance. Check your camera manual for an icon looks like this then see if your camera recommends calibrating against white or grey. Use the Ezybalance that comes with the Cubelite kit to calibrate your camera.

Lamps used for street lighting purposes are gas discharge lamps, which are much more efficient than the light bulbs you use in your house. The elements contained within the lamps give colour to the light emitted and the Lighting Engineer has a large choice of lamps from which to select. The low pressure sodium lamp is the most energy efficient, but has the drawback that its strong yellow/orange colour makes it difficult to tell the true colours of cars and other objects.

No, you don't have to toss them just yet. However, a blue glow indicates the presence of some gas in the tube, which is not a problem in most situations. If you have noticed an increase in the amount of blue, then you might want to get a new set of tubes sooner than later. Too much gas in the tube can lead to bias failures, blown fuses, and possibly blown output transformers.

The short and simple answer is YES! However, achieving the same effect requires a combination of several factors: The LEDs should have as wide a viewing angle as possible. This will allow the light from one LED to "melt" into the light from surrounding LEDs and make them appear as a single, continuous light source. The LED string should be placed a reasonable distance away from the object to be lit.

A) Probably nothing! The most advanced nixies, often called "Ultra Long Life" types, use quite a bit of mercury to prolong their life to 100K hours or more - this equals *decades* of continuous operation. In some tubes, this produces the strange coloration described at normal operating current. In other tubes, the effect is only objectionable at higher than normal currents [as might be used in a multiplexed display].

Getting good teat skin coverage is an important consideration of effective teat dipping our field trials the bright orange color was easy to see, a particularly important factor in the management of today's large herds.

Most of the time, otitis media clears up with proper medication and home treatment. In many cases, however, further treatment may be recommended by your physician. An operation, called a myringotomy may be recommended. This involves a small surgical incision (opening) into the eardrum to promote drainage of fluid and to relieve pain. The incision heals within a few days with practically no scarring or injury to the eardrum.

All of these tubes are made right here in the U.S.A. The tubes are manufactured and shipped very close to Salt Lake City, Utah.

Get a Hatori SB-8, it really sounds great! Other options are Weston Genesis Pro pipe and the KSJ speed 30 tuned muffler Another possibility is that if your struts have worn through on the bottom like mine, then the skids might be loose enough to vibrate against the set screws. Also the screws that screw the tail boom support rods to the horizontal fin are just a little long. Use a dremel cut-off wheel to take off the last 1/16"-1/8" from the screw.

We are only as good as our worst tube. We are very selective about which tubes we use in Manley products and we have several different testing and burn-in jigs to test for certain parameters which will be most important for that tube in a given circuit. We will test and select a tube set for you that will be optimized for your Manley piece of gear and in most cases, your tube set will actually be tested in another one of what you have.

Not especially. Although I might have made a killing in the stock market had I invested the money I instead put into finding and stocking these large quantities of tubes ten years ago when the USA military were dumping their stocks of NOS JAN vacuum tubes.

Yes, it takes a while to get used to, but you will be able to hit with even more top-spin and back-spin with the moveable mass racket.

The tubes are made of a tough nylon and are protected from wear by the frame. Leaking and migration of the fluid from the tubes is minimal and the fluid will last for many years.

A polished surface is really a surface so that is so smooth, it is shiny. Naturally, the surface is a microscopic mountain range, with the light reflecting into itself. Buffing smoothes that surface to the point the light reflects back, the ‘glow’ is derived from thousands of fine directional buff lines reflecting light back that is just slightly scattered, this gives fine polished metals that ‘illumination’.