What vacuum tubes are interchangeable?
Normally equivalent vacuum tubes such as a 6J5 or 6J5GT or 6J5G are electronically the same. They may have a different construction, i.e. metal versus glass, or a different glass shape. They will perform the same.
How many types of vacuum tubes are there?
There are a lot of different vacuum tube types, all with their own applications, characteristics and construction, most of which fall into four general types: (1) The diode, (2) the triode, (3) the tetrode, and (4) the pentode.
What countries still make vacuum tubes?
Vacuum tubes are made on an industrial scale only in China, Russia and Slovakia.
Where are JJ vacuum tubes manufactured?
Slovakia
JJ Electronic, s.r.o is a Slovak electronic component manufacturer, and one of the world’s remaining producers of vacuum tubes. They are based in Čadca, in the Kysuce region of Slovakia.
What are NOS tubes?
Answer: “NOS” stands for “New Old Stock”, which means that the tube has never been used and is from old production. In most vacuum tube circles NOS generally implies that the tube is in the original box. “NIB” stands for “New In Box”.
What is a tube number?
A tube type consists of two or more letters and two digits, as in: ECH21, PL84, AZ41, UBC42, EABC80, and EM4. In EM4 there is only one digit, but just pretend there is a 0 in front of the 4. The first letter encodes heater type. The following letter[s] encodes what systems are in the bottle.
What are 12AX7 tubes used for?
The 12AX7 is typically used as a class-A amplifier in the hi-fi, professional line and microphone preamps and is usually, always found in the preamp sections of tube guitar amps including Fender, Marshall, Boogie and Soldano.
How many different vacuum tubes are there?
Are old vacuum tubes worth anything?
According to many factors such as type, status, and use, old radio tubes’ value range in price from some to hundreds and thousands of dollars. For example, an RCA electron tube costs around $15, while a 101D vintage vacuum tube can take you $400.
Where are Genalex tubes made?
Saratov, Russia
Thoroughly tested, these new production Genalex Gold Lion tubes are assembled by hand in the Reflektor factory in Saratov, Russia.
Where are JJ tubes made?
JJ Electronic, s.r.o is a Slovak electronic component manufacturer, and one of the world’s remaining producers of vacuum tubes. They are based in Čadca, in the Kysuce region of Slovakia. Most of the products that JJ offers are audio receiving tubes. These vacuum tubes are mainly used for guitar and hi-fi amplifiers.
What is heparin tube?
Heparin VACUETTE® heparin tubes are coated on the inside wall with spray-dried lithium, ammonium or sodium heparin and are used to determine analytes in clinical chemistry. The additive acts as an anticoagulant, and blocks the clotting cascade.
What is a EDTA tube?
It’s a tube coated with spray-dried K2EDTA on its inner wall. EDTA acts as an anticoagulant, binding the calcium ions and interrupting the clotting of the blood sample. EDTA is used for most hematology procedures, assessing complete blood count, preparing EDTA plasma, whole blood collection and bone marrow specimens.
Can I replace 12AX7 with 12AU7?
You can interchange a 12AX7 with 12AT7, 12AU7, 12AY7 or 5751 as they are all the same pin structure, however they will each give you a different result in your amp. Each of these tubes has a different gain factor, which means some will give higher gain and others lower gain.
Is 12AU7 same as 12AX7?
Technically, yes, you can physically interchange a 12AX7 tube for a 12AU7 tube in your amp without risk of major damage to your amp.
What is the difference between type 6sh7 and type 6sg7 pentodes?
Type 6SH7 is a ‘straight’ pentode while Type 6SG7 has a variable-pitch grid, giving it a vari-μ characteristic, and would be suitable for the IF strip of radar receivers incorporating ‘swept gain’. The thin metal tube envelope is 25 mm in diameter and, excluding the IO base pins, is 51 mm tall. References: Data-sheet, 1040 & 1043.
How many Ma is a 6S8 6T8 heater?
150 mA heater, rem cutoff 6S8 6T8, 6AK8 6K5, 6F5 6SF5 7B4 6AQ4 12AX7 mu=100 6C8 6SL7GT 7F7 5751, 5755 mu=70 (6C8: 40)
What is the equivalent of the Bold listings on the tube?
The Bold listings are shown as equivalents in a tube manual, and could probably be sustituted without any changes other than rewiring (but check dissipation rating for power tubes!). The others range from close to somewhat similar… best to compare data sheets before trying. 4-5-6-7 Pin Top Cap OCTAL Single-Ended Octal LOKTAL Miniature 7 pin
How many Ma is a 6C4 heater?
7K7 6CN7, 6FM8 6G6G 6AK6 150 mA heater 6C5, 6J5, 6L5 7A4, XXL 6C4 12AU7: (6C4 x 2) 6C4, 6L5: 150 mA htr.