PAIR of VTG Sound Valves M40 Mono Tube Power Amplifiers – Dynaco MK IV. The amplifiers are in near mint condition! There are some very minor imperfections. Both amps power up as they should and they work great. The tubes come with the amps. Note this is a matched set w/ consecutive serial numbers! Please be sure to check out my other listings as I will have many other vintage audio and radio-related items up for sale.
GREAT PAIR ZENITH 6A5G. Date Codes = ROR and ROP. TESTED on HICKOK TV7. Results = 65 and 67. Minimum Good = 38. All Tubes Tested on a Calibrated Hickok TV7 or Sencore TC136.
General Electric, five star red logo. Vf 6.3 Volts / If 0.45 Ampere. Miniature type used primarily as output amplifier in automobile receivers and in ac- operated receivers. Requires miniature 7-contact socket. Within its maximum ratings, the performance of this type is equivalent to that of larger types 6V6 and 6V6GTA. Fender Musicmaster Bass amp Vintage Bell & Howell 6AQ5 Monoblock D-Lab/Zenith Model M-7, Dynaco Push-Pull EL84/6BQ5 or 6V6/6AQ5 AMPEX Model 970 tape recorder. Nutone 2401B stereo tube amplifier Manley Absolute Headphone Amplifier Hallicrafters HA-5 VFO Micro Champ Amplifier ELEKIT TU-8150 6AQ5/6V6 Dynaco Push-Pull EL84 / 6BQ5 or 6V6 / 6AQ5 Tube AmpSony 500A single ended 6AQ5 stereo tube amp. D-Lab Boutique repurposed GenRad 6AQ5 tube guitar amp. Tested on UM-18 computerized military tester. 2, tested and matched. We have hundreds of thousands of tubes for manufacturing purposes, all vintage american made. 2 If you are looking to re-tube and amplifier, guitar amplifier, preamplifier, compressor, equalizer, microphones or any tube equipment, send us the model number and we will take care of the rest, and generate a custom listing for you. 4 We carry most USA made brands such as RCA, GE (General Electric), Sylvania, Raytheon, TungSol and PentaLabs , just to name a few. 5 We also carry european brands such as Amperex, Mullard, Telefunken and Marconi , just to name a few but in less quantities.
GREAT PAIR ZENITH 6A5G. Date Codes = ROR and YOR. TESTED on HICKOK TV7. Results = 68 and 68. Minimum Good = 38. All Tubes Tested on a Calibrated Hickok TV7 or Sencore TC136.
PSVANE Vacuum Tubes HIFI 805A Replace other 805 tubes directly Uf: 10V If: 3.25A Input capacitance: 8.5PF Output capacitance: 10.5PF Max. Rated value: Anode voltage: 1500V Anode power dissipation: 125W The price is for 1 matched pair. 1 Matched Pair PSVANE 805A Vacuum Tube Vintage Hifi Audio AMP DIY. Replace other 805 tubes directly. Input capacitance: 8.5PF. Output capacitance: 10.5PF. Anode power dissipation: 125W. The price is for 1 matched pair. Thank you for your understanding. We mainly supply audio amplifier, tube amplifier, guitar amplifier kit and diy components. We will reply you within 24hours, ensure help you solve the problem, make your satisfied. Our working time from 8AM to 18:00PM.
All our tubes have been tested for. GAS SHORTS TRANSCONDUCTANCE & EMISSIONS. These tubes have been tested – and are considered NOS ; they meet or exceed the published data set for GM. NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states Individual tubes, like any manufactured product, may have characteristics that range above or below the values given. Test Results are ALWAYS available upon request (if not photographed). Send me a message! I might have what you need! Tubes will be packaged in white boxes – if the original boxes are not photographed in the listing or stated as “with original box” they are not included. 90 % of our tubes are Tv7 tested, our tv7 is Calibrated and our go to tester. The tv7 tester has been around a long time and is a trusted tester for military, who had high standards for reliable tubes that would not fail in critical conditions. Military standards were tubes needed to meet 60/65% which they established as (minimum value). There isn’t a “specific” indicator or result or data set anywhere that universally designates a vacuum tube as “new old stock” when using a tester nor for what test result is given. The best way is to calculate the GM – and check the data sheet for each tube – a “nos”tube should typically measure between the average and maximum micromhos(GM). A common misconception of tube testing is that every unused tube, new or vintage, should test at 100% of the meter scale of the tester. A tube was considered acceptable/new/ passed standards if it tested between the specified minimum and maximum on a tube data sheet or the minimum value specified on the tester (tv7 is minimum is 65%). Tubes do not give the same reading across testsrs – even the same model tester will give a different reading sometimes. If you don’t like the sound of a tube, so long as it is still in the same condition as arrived message me. I DO NOT OFFER A TUBE ROLLING SERVICE, vintage audio tubes typically require a burn in period, that’s where the tube sounds the best. Please see my notes on noise tests below. We have a few different testers available to ensure the quality of the tube (as some tubes can not be tested on the tv7). Tv7 testing is tedious and I spend hours testing tubes and double testing tubes – if you notice a mistake(like a picture doesn’t match the title) please be gracious and let me know. UNLESS PHOTOGRAPHED WITH THE ORIGINAL BOX- tube will come in repackaged white boxes- 50-90 year old cardboard packaging doesn’t hold together well, not in my hands anyways. We have over the last 20 years amassed a huge collection of vintage amps/ parts / tubes and have decided to downsize that collection. Every tube has been marked for tracking and security purposes – these marks wipe off easily and without the mark no return will be accepted. Sound quality is tremendously SUBJECTIVE. Tube tester NOISE TEST. This is a very marginal test, only for special checking. This test needs sound amplification; hearing / listening to noise with headphones would indicate a real disaster inside a tube (THE shorts test WOULD already BE evidence OF THIS). There is nothing wrong with performing that noise test however. That test is not going to tell you whether the tube will be silent in your SET (single ended triode) amp or in anything else. Ultimately, the best way of testing a tube for microphonics is in an actual chassis or amplifier similar to one in which it is intended to be used. Since amps have a wide variety of circuit designs and tube placement, this test is most effective in YOUR AMP or one that is almost identical. Hence, most people advertising tubes as tested for Noise or Microphonics are probably NOT testing them in any meaningful way FOR YOU OR YOUR AMP. “Noise” and “Microphonics” are often buzzwords for other issues. There is a small percentage of tubes that have a problem with noise but far less than most people think. In properly designed circuits objectionable “tube noise” is seldom found. In other words, it is a rare tube that will be noisy when used in most circuits. Always check the data sheet of the tube you plan to use. PLEASE message me BEFORE you open a return. PLEASE NOTE: Tube silkscreen (lettering on the tubes) is VERY fragile. It can be wiped off and destroyed VERY easily.
BRAND NEW TJ FULLMUSIC VACUUM TUBE Item No. 300B/n, Mesh plate The price is for 1 Matched pair (2PCS, factory matched&test) Mesh plate, ceramic base, gold plated brass pins Nominal operating conditions and parameters Filament voltage………………….. 2.5V Nominal filament current……………….. 1.5A Plate voltage……………………. 250V Grid voltage…………………….50V Plate current……………………. 34mA Amplification factor………………….. 3.5 Load resistance…………………… 3900 ohms Grid Current……………………..0.05? A Limiting Operation Conditions for Safe Nor simultaneous ratings Maximum plate voltage……………….. 275 volts Maximum plate current……………….. 10 watts. New Matched Pair TJ Fullmusic Vacuum Tube 300B/n Mesh Plate Vintage HIFI AMP DIY. BRAND NEW TJ FULLMUSIC VACUUM TUBE. The price is for 1 Matched pair (2PCS, factory matched&test). Mesh plate, ceramic base, gold plated brass pins. Nominal operating conditions and parameters. Filament voltage………………….. 2.5V. Nominal filament current……………….. 1.5A. Plate voltage……………………. 250V. Grid voltage…………………….50V. Plate current……………………. 34mA. Amplification factor………………….. 3.5. Load resistance…………………… 3900 ohms. Grid Current……………………..0.05? A. Limiting Operation Conditions for Safe Nor simultaneous ratings. Maximum plate voltage……………….. 275 volts. Maximum plate current……………….. 10 watts. Thank you very much! We will put legal effort to minimize any GST or V. T or GST yourself. Provide your full name & correct address in details. Less than 0.5%. We sell vacuum tubes, Amplifiers, various tube sockets, audio connectors, triode transformer cover, leather amplifier handles, capacitors, various knobs, aluminum amplifier chassis, etc. Various Parts for tube audio guitar amplifier projects! We will reply all of your messages ASAP!
Diese 12-Zoll-Isophon-Alnico-Vintage-Lautsprecher sind ein perfektes Paar für Röhrenverstärker mit 4 Ohm von Telefunken. Hergestellt in Deutschland, sind sie gebraucht, aber in gutem Zustand und passen perfekt zu Vintage-Audiosystemen. Mit grösseren Röhrenverstärkern bieten sie eine hervorragende Klangqualität und sind ein Muss für jeden Audiophilen. Track Page Views With.
Factory test&matched pair The price is for 2PCS/lot. PSVANE CV181-TII Classic Edition. CV181-TII is double triode, used in voltage amplification circuit, Can be replaced directly by 6N8P and 6SN7GT. Psvane MARK TII Series have two sub version: TII Classic version Or TII Collector version. The difference between Classic version and Collector version : It’s from the same production line, the best appearance, the best electronic parameters and the timeproof tubes will be selected to Collector Version. The standard quality tube will class to Classic Version. There are the same selection method in the vintage tube, like telefunken select the best ECC83 to create E803CC, Mazda select the best 12AX7 to create their 5 star 3 mica 12AX7 for military or other important instrument use case.
