Go read this Taste of Tubes beginner's guide written by those ol' SFI folks. That will get you started.

No. We run a bizniz not a training institute. I wish we had more time to be able to educate people about the wonderful world of vacuum tubes, but we just don't. FAQ #1d. Ms. EveAnna, what a way cool website!!!!!!!!!!!!.....awe geez, no manley gear here, but the piggy bank is started...been surfin through commonsenseaudio shoppin' for 'tiques....and stumbled, almost fell, into manley labs....ok, so umm, i've been a solid stater, no hitting......pretty much toured your world...

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.

Some of them are dead out of the box. Some tubes don't make it through burn-in and after a few days they just go noisy or quit. Sometimes UPS sabotages our shipments and after all our testing efforts the tube arrives broken at your place. Sometimes a tube decides to end it all early and intentionally misbehaves after a few months. Other tubes are real troopers (like my 98 year old neighbor*) and run strong for 30 years.

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.

Sure. Give a call to the factory (909) 627-4256 and ask for Manny Q in the parts department if you already know what you need.

For the output tubes, we use the EL34EH (Russian), and have found these to be quite good. We sell them at $14/ea in quantities of 20 (two matched sets of ten). We also use the Slovakian JJEL34's which are pretested for us by my good buddy, Aspen Pittman at Groove Tubes who imports them. I have heard good things about the Svetlana's too but they are hard to procure at times. It's tough to evaluate the lifespan of a tube until it dies so we stick with what we know works and sounds good.

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.

The sweep hose should be moving in a gentle sweeping motion. You can adjust its motion by turning the adjustment screw until it slows down to a gentle sweeping motion. Also, verify that your sweep hose scrubber is not blocking the opening at the end of the sweep hose. If it is, move the scrubber so that it will not block this opening.

No, vapor steam cleaning is NOT a vacuum, although there are some products which will soon be on the market which attempt to combine the two technologies. A vapor steam cleaner uses remarkably little water, less than a gallon of tap water in an hour's worth of continuous cleaning .All vapor steam cleaners use low moisture vapor which leaves almost no damp residue on the surface which has just been cleaned.

The answer is simple - atmospheric pressure is applying approximately 15 pounds/sq. in. (psi at sea level) of force in all directions. With the vacuum pump, we remove most of the air from one side of the wood (creating vacuum), thereby the atmosphere pushes the wood from the other side. This push or force is easily calculated by reading the vacuum gauge and multiplying the reading (called vacuum level) by .5. Therefore, if you are applying 26"Hg to 1 sq. ft. of wood, you will generate 1872 lbs.

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".

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.

Hold the body of the tube securely with your fingers as grabbing a small object. Match the pins direction with the tube socket then insert it vertically. Nudget the tube slowly but firmly until the base of the tube reaches the socket.

Sorry. Just kidding. Yes, of course we do. We have about 100,000 tubes in stock of the several major types we use.

A major function of the category information in the Diseases Database is to structure lists: "there are acquired causes and congenital causes..." any item classed as (say) 'bacterial' is automatically classed as an 'infection'; an item classed as having (say) 'sex linked inheritance' is automatically classed as 'Mendelian' and thence to 'inherited' One may wish an item to belong to several categories at the same time.

The vacuum pump creates vacuum pressure which comfortably & enjoyably keeps the penis stretched out longer & wider than its normal size. The penis can stretch to monstrous sizes when pumping for long periods of time. The cells in the penis will slowly & gently tear apart over time & new cells will grow in.

To create lightweight, powerful cleaning, better air quality and less noise, the Beam power unit is typically located in the basement or garage, and is connected to convenient inlets throughout the home via vacuum tubing. Plug the hose into an inlet and the system is turned on with a switch on the hose handle. Particles are completely removed from living areas and collected in the power unit's dirt receptacle.

We have a number of tube testers that check mutual conductance, shorts, gas, and grid leakage. Normally a vacuum tube that passes these tests will function perfectly in your equipment. Every tube is tested before it is shipped and we guarantee them for 30 days.