By far the most comprehensive and comprehensible book on transistor bias and gain that I've run into is "Practical Transistor Circuit Design and Analysis" by Gerald Williams; 1973 McGraw Hill, TK7871.9.W53, ISBN 0-07-070398-1.

I need to find that JRC4558 chip that's in the TS-808, I heard you can get them from old radios and other voodoo sources! Yes, you probably can. Or, you can buy the current chip that sounds the same as the original - so close you can't tell the difference... from MOUSER. The part number is:513-NJM4558D. There's more about the TS and chips here.

The tubes can be made of any durable substance that is capable of holding a vacuum. Every route will have special requirements according to local conditions and economics. Some possible materials include but are not limited to: Sealed concrete, glazed ceramic, steel, aluminum, fiberglass, and plastics.

General anesthesia often results in the loss of the ability to breathe on your own. There are different ways to assist your breathing - one of which is the breathing tube (known as an endotracheal tube). There are many situations when the placement of the tube is the safest and most reliable method to assure adequate breathing. There are alternatives in other cases including breathing through mask or other devices.

Both the ABREVA® tube and pump use the same 10% Docosanol formulation. The difference is in the device used to dispense ABREVA®. The tube is great for use at home, and the pump offers a clean and easy way to carry your ABREVA® with you on the go.

Between the 17th and 30th day after conception (or 4 to 6 weeks after the first day of a woman's last menstrual period), the neural tube forms in the embryo (developing baby) and then closes. The neural tube later becomes the baby's spinal cord, spine, brain, and skull. A neural tube defect (NTD) occurs when the neural tube fails to close properly, leaving the developing brain or spinal cord exposed to the amniotic fluid. The two most common neural tube defects are anencephaly and spina bifida.

It sounds like a good tube gone bad. Best thing to do here is exchange the tubes one at a time between the two channels to confirm this. This is something you can do yourself if you want; just unplug it, let it sit for a half hour or so to discharge the volts so you don't put your hand somewhere and get zapped, take off the top cover, and exchange the tubes one at a time and see if the problem switches channels. If you find that it's a tube, you can order one from us.

If the hose has come out of the elbow at the bottom of the reservoir, you have to send it in for repair.

You should not move when you hear the knocking sound. In between pictures, for most exams, you may reposition your arms, or scratch your nose. It is important that you not move the body part being imaged until the exam is complete.

Generally speaking, for the small tubes, if you notice an unacceptable increase in background noise ("hiss") then the tube who is responsible for making the gain in the circuit probably needs to be replaced. The tube(s) making the gain will usually be shorter than the output tube. Common types we use for gain in most of our circuits will be 12AT7, 6201, 12AU7, 5814, 12AX7, 5751, or 6072.

In April 2006, The ABREVA® package changed to allow consumers to see the tube through the packaging. The package no longer contains a cardboard carton as the tube is now displayed behind a plastic bubble.

Technically speaking, nothing! Sonically speaking, everything! In the beginning, there were only tubes... and inside your amp you would find them glowing as they amplify your signal. Eventually they a found "better" way of making amps and tubes were replaced by things like operational amplifiers and transistors. From that point on, amps could be made smaller and cheaper, but not necessarily better. Tube amps sound warmer, smoother, and more musical for any style of music.

Sixty million women are of childbearing age in the United States; all those who are capable of becoming pregnant are at risk for having an NTD-affected pregnancy. It is not possible to predict which women will have a pregnancy affected by an NTD. Ninety-five percent of NTDs occur in women with no personal or family history of NTDs. However, some risk factors are known: NTD-affected pregnancy increases a woman's chance to have another NTD-affected pregnancy approximately twenty times.

Two-tube stethoscopes, such as the Harvey DLX and Elite, provide an individual sound channel to each ear. This allows you to hear the subtle characteristics of heart sounds and murmurs more distinctly. The heavier tubing also filters out the distracting noise typical of a busy medical environment.

Usually a tube whose glass has been broken or cracked usually will have a white powdery like substance inside it where all that silvery stuff used to be. No, it is not cocaine and we didn't put it there.. I haven't seen it happen. Usually the glass will just crack at the base of the tube if it is going to physically break due to a sudden change in temperature and "all the vacuum will leak out".

You can try chlorine bleach. Fill up your CamelBak® reservoir with water then add a couple of teaspoons of bleach. Let this sit for an hour or so. If this does not work, we suggest that you replace the reservoir; the tube with a Tubing Extender Kit.

First straighten the wire as much as you can. You don't want any kinks. Next squirt rubbing alcohol in the tube and on the wire. Start pushing the wire through the tube while you continue to put alcohol on it.

Some tests require a specific amount of blood. A lot of tests require the use of serum, so the blood is collected in a tube where it is allowed to clot and then separated. Some tests require special anticoagulant or preservatives in the tube.

Yes, we supply a tube of gel glue with each kit. The reason for the glue is that the inside of the large hose connector is sometimes coated with a release agent that can be very slippery. The inside should be cleaned and the parting agent removed. When installing the reducer into the 1-3/4 coupling, the glue attaches it to avoid slipping. Forming and fitting your hose is easy and the direction of the hose going up or down doesn't matter.