{"product_id":"electro-harmonix-tung-sol-6386-dual-triode-medium-mu-vacuum-tube","title":"Electro-Harmonix TUNG-SOL 6386 Dual Triode Medium MU Vacuum Tube","description":"\u003cp\u003eThe 6386 is a dual triode, medium mu vacuum tube particularly useful in circuits that exploit each section’s remote cutoff characteristic. Famously, it can be found in various variable-mu audio compressor units. These units and the unique sound of the 6386 have colored popular music since the 1960s. Historically, many have found use for the 6386 in cascode circuits, intermediate-frequency amplifiers, and as a mixer where it can be used for automatic gain control. When employed in a cascode, it performs well with high gain and both low noise and low higher-order harmonic distortion.\u003c\/p\u003e\n\u003cp\u003eThe 6386 displays a great deal of mechanical stability and can be expected to perform well under the most strenuous of conditions. Its emission characteristics will remain unchanged after extended periods of operation under cutoff conditions. Tung-Sol 6386 tubes are being manufactured to the tightest of tolerances on brand new machinery in our factory in St. Petersburg.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCathode – Coated Unipotential\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeater Voltage, AC or DC ......................................................................6.3 +\/ - 10% V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeater Current....................................................................................................0.35 A\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDirect Interelectrode Capacitances*\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGride to Plate, Each Section...................................................................................1.2 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInput, Each Section...............................................................................................2.0 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eOutput, Each Section.............................................................................................1.1 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeater to Cathode, Each Section...........................................................................2.6 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGrid to Grid......................................................................................................0.003 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlate to Plate...........................................................................................................0.1 μμF\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e*Without External Shield\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMECHANICAL\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMounting Position.............................................................................................................Any\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eEnvelope............................................................................................................T - 6 ½, Glass\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBase .............................................................................................E9 - 1, Small Button 9- Pin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDESIGN -CENTER VALUES, EACH SECTION\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlate Voltage........................................................................................................300 V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlate Dissipation....................................................................................................1.5 W\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDC Cathode Current...............................................................................................18 mA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHeater – Cathode Voltage ‡\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHeater Positive with Respect to Cathode.................................................................90 V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeater Negative with Respect to Cathode............................................................. 90 V\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e‡When used as a cascode amplifier with the two sections connected in series, the heater – cathode voltage of the grounded – grid stage may be as high as 250 Volts maximum with the heater negative with respect to the cathode.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCLASS A1 AMPLIFIER, EACH SECTION\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlate Voltage........................................................................................................100 V\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCathode – Bias Resistor.........................................................................................200 Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eAmplification Factor................................................................................................17\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlate Resistance, approximate.............................................................................4250 Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eTransconductance.............................................................................................4000 μS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlate Current..........................................................................................................9.6 mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGrid Voltage, approximate\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eGm = 100 Micromhos..........................................................................................-16 V\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCascode Amplifier – See Circuit Diagram\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePlate – Supply Voltage.................................................................300 ..................200 Volts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlate Load Resistor...................................................................10000 .......................0 Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eVoltage – Divider Supply Voltage..................................................250 ..................200 Ω\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eGrid – Supply Voltage....................................................................-5 .....................-2 Volts\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCascode Transconductance...............................................................................4000 μS\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCascode Plate Current..........................................................................................10.5 mA\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThird Harmonic Distortion\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eEsig = 1.0 Volts, Peak...............................................................................................0.5 %\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eInoperatives Control\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eContinuous operating timeunder life – test conditions or equivalent for all tubes prior to characteristics testing.............................................................................................46 Hours\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eHeater – Cycling Rating\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCycles of Intermittent Operation, Minimum..........................................................2000\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eEf = 7.5 Volts cycles for one minute on and one minute off. E b = Ec = 0 Volts. Ehk = 135 Volts with heater positive with respect to the cathode.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShock Rating\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eImpact Acceleration in Any Direction....................................................................600 G\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eForces as applies by the Navy – type, High Impact (flyweight) Shock Machine for Electronic Devices or its equivalent.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFatigue Rating\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVibrational Acceleration in Any Direction..............................................................2.5 G\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eVibrational forces for a period of at least 100 hours at a frequency of 25 cycles per second.\u003c\/em\u003e\u003c\/p\u003e","brand":"Electro-Harmonix","offers":[{"title":"Default Title","offer_id":45226169401423,"sku":"6386 TUNGSOL","price":164.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0054\/9466\/9382\/files\/6386-3.jpg?v=1778687180","url":"https:\/\/shop.musicredone.com\/products\/electro-harmonix-tung-sol-6386-dual-triode-medium-mu-vacuum-tube","provider":"RedOne Music Canada","version":"1.0","type":"link"}