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.

Yes, but we don't recommend it. The SM-2A3 has been "voiced" in concert with micro power tube amps. Its frequency response curve is an acoustical inverse of traditional micro power SETs. When powered by such an amplifier, the result is a composite flat frequency response. However, amplifiers with linear frequency response [all solid state and most high-power tube] will improperly interface with the SM-2A3 response to create a bright, forward treble and an elevated midbass.

This is a question that gets asked in various forms quite regularly. The short answer is that each seems to have their advantages and disadvantages, in terms of portability, reliability and sound. As with any piece of musical equipment, the ideal thing is to try several amps of each type and decide for yourself which camp you belong to, but comments on both sides of the issue have been summarized here to help guide you in your own testing.

A tube is a vacuum tube. A valve is the British term for a vacuum tube. Solid state means transistor, or chips such as op amps that are built from transistors. (Diodes may also be either tube or solid state). We sometimes refer to solid state as "silicon" or "sand", but solid state devices may be germanium based as well. Valvestate" is a Marshall marketing term to describe an amp design which has a solid state power section but the "characteristics" of a tube amp.

The rectifier circuit in an amplifier converts the Alternating Current (AC) from the wall outlet to Direct Current (DC) required for operating the various circuits inside the amp. Originally, this conversion or "rectification" was accomplished using a vacuum tube rectifier, also known as a dual diode. Later with the advent of solid state technology, the rectification process was accomplished much more efficiently and less costly with silicon diodes.

The Radial Switchbone is an ABY box that is designed to toggle between two amps. Although not quite the same as switching heads, the Switchbone works very well, sounds amazing and will do the job.

Just as there can't be one best wine for all meals, there isn't one best amplifier or preamplifier for all music systems and tastes. We believe that properly designed vacuum tube and solid-state electronics can and should coexist and complement each other, very much like red and white wines complement fine cuisine and coexist in the real world. BAT's mission is to give our customers choices that fit their lifestyles, budgets, and system needs.

Speaker compatibility with tube amps is a function of load impedance, sensitivity, room size and listening levels. A narrow phase angle impedance that is contained within a small window [say 8-ohm nominal, no lower than 6 and no higher than 10] is best. Impedances higher than 8-ohm are useful for micro-power SETs and OTLs. Sensitivities of 90dB or higher work with most low-power SETs, but if the impedance curve (as it is with all Soliloquy models) remains truly benign, even 88dB might do.

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.

Solution: The rule of thumb is the radial air gap between the tube OD and coil ID should be .25" up to 3" OD and .375 radial clearance from 3" OD up to 6" OD Solution: Install 10 micron filter on the inlet leg of coil to filter mill scale and slivers from induction coil. Solution: Install booster pump to increase pressure to 100psi to induction coil to eliminate boiling of fluid to coil. Solution: Install air line or flush to rinse ID of coil of slivers, check mill set up to eliminate slivers.

Induction coils for solid state CFI welders are designed to match the output circuit of the welding unit and provide the best welding process efficiency. Welders are tuned at the factory at nominal frequency and matched to the load for optimum performance. Attempts to use vacuum tube induction coils with CFI welders usually result in a poorly matched load and operation at a lower frequency.

Answer: All relays are basically switches that open and close. When closed, they complete a circuit that allows electricity to flow. A mechanical relay uses an older technology, involving an electromagnetic coil to close the contacts that complete the connection. This action causes a clicking noise. Some people find it annoying; some find it reassuring. Because the relay is mechanical, it can fail for all the usual mechanical reasons ? e.g.

The difference is that a demand softener only regenerates when you use enough water to cause it to regenerate. The "solid state" (or mechanical) time clock unit will regenerate at a specific time even though you have not used water or used very little. All of our Aqua Pure units utilize Electronic Meter Technology. The state of the art control head allows you to monitor and control every function and cycle. It meters your water usage and regenerates only when necessary.

Yes, you can do this mod to any tube amp, regardless of the type of rectifier. You need to add a 1N4007 diode in series with the V+ line coming off the second filter cap, feeding the splitter and preamp. The cathode (BAR) should face the preamp circuitry, and the anode is connected to the junction of the choke output and second filter cap. When the output tubes pull current from the main supply, the power supply sags.

Aerogel is made up of microscopic beads or strands connected to form a continuous network. Since the network fills space and supports itself, it is considered a solid.

This is true. To deal with this, the Headbone is equipped to manage two loads: the speaker for the active amp and a load resistor for the standby amp. The Headbone transitions between these two loads when the status is changed.

Solid State recorder refers to the technology and memory that the PMD670 utilizes. The PMD670 records to non-volatile type memories such as Compact Flash Cards or Microdrives. This means that your digital audio is preserved in memory until the files are removed from the card. Any of the files that are recorded onto these cards in the PMD670 cannot be recorded over, either.

The lasing material is a solid (such as YAG or glass or ruby). Other types of lasing materials are gases and liquids. The first working laser was ruby, developed by Dr. Ted Maiman at Hughes Malibu before 1960. YAG began to replace ruby by 1970. YAG is energized (pumped) by a lamp, called optically pumped, or by a laser diode, called diode pumped. Rod Waters, Owner of Laserod, was fortunate to have worked for Dr. Maiman for 3 years.

A solid state disk (SSD) is a storage accelerator that attaches to a server just like a standard magnetic rotating disk. However, SSD stores data in DRAM, the same type of semiconductor devices used to make main memory for the CPU, not on a rotating platter with a magnetic coating. This memory is approximately 200 faster than a disk drive.<TOP OF PAGE>

Because solid-state recording does away with the parts that are found on traditional tape mechanisms, it has a quiet operation; is virtually maintenance-free; and can be used in extreme and harsh environments.

While traditional computer systems typically use hard disk drives for storage of data and programs, solid-state systems instead rely on devices without moving parts. The solid-state advantage is the decreased chance of hardware failure, especially in harsh environments. Solid-state systems can be constructed by substituting flash memory for hard disks.

The shipping charge, thats it. Both samples and regular items are the same size & shape and have the same labels. The shipping is cheaper (& slower) on sample tubes GIVING CUSTOMERS AN OPTION WHEN THEY ONLY WANT TO TRY OUR PRODUCTS OR TO PURCHASE JUST A FEW TUBES (up to 9).

Power (Watts) is derived by multiplying the application Voltage x Current required. Conversely the amount of Current can be calculated by dividing Power/Voltage where Voltage is the battery pack voltage.

Well, the biggest difference goes back to MOSFETs again. Most of our newer ??????4 number?????? amplifiers (i.e. the GFA-5802) use MOSFETs while all our older ??????3 number?????? amplifiers (i.e. the GFA-555), used bipolars.

In tube & pipe industry there is no difference with an exception - pipes in all their meanings are always inside round. In English both words have several different meanings. See also in Useful links http://www.onelook.com/browse.shtml - Browse Dictionaries Log in as the member, click at MEMBER'S AREA, then at Inquiries and finally at Add new inquiry. Complete the form and click at Save changes.

Engineered products, available in planks and strips, are manufactured of hardwood using a cross-directional laminated construction (3 to 5 layers), with a top layer of premium hardwood. This construction counteracts the natural tendency of wood to expand and contract with seasonal changes in temperature and humidity, making engineered products inherently dimensionally stable. Solid products, available in planks, strips or parquet, are manufactured from a solid piece of wood.

A boxsprings is a unit that contains springs or other types of torsion elements. These elements allow the boxsprings to deflect or flex when weight is applied through the mattress. As solid foundation is made of wood and does not have the ability to flex or deflect. They appear the same from the outside. It is important to know which is under the mattress you are considering and why. Both have their uses under different mattress types.

Body Butters are made with lots of natural and unrefined cocoa butter and the melting point for cocoa butter is about 98 degrees Fahrenheit. Therefore, if you leave your Body Butter where the temperature is above 90 it can get quite liquid, or if it is below 70 it will be quite firm. If you warm the tube in your hand or stick it in the fridge this should solve the problem.

Amps is an abbreviation for amperes. Amperes is the technical term for the amount of current flowing through wiring. A good analogy has always been to think of amps as water pressure through a pipe. Low pressure, the water trickles out but high pressure and that hose can, knock the socks off you. Wiring is sized to handle different amperes, therefore your circuit breaker / fuses are rated for different amperes. Circuit breakers protect wiring.