El34 heater current 7 Second grid current, mA 20 8. 65 1. 225 amps per tube. 2 pF Anode to Grid 1 ca_gl <1. 3 amps at 6 volt parallel operation. 5 amps which could be proof of enough PT reserve for the KT66 tubes The Power transformer on my 6L6GC amp is 658-0025, 394025 Anybody got an EL34 amp nearby to check the power transformer numbers for me? Dec 29, 2021 · I personally have ZERO concern about this suggested concern of using tubes that draw less heater current increasing voltages on the heaters of two of my amps where I change out tube rectifiers and switch between 6K6, 6V6, 5881 and 6L6's. 5 8 523 Electrical parameters Output power, W Parameters, conditions and units Nominal min max Nominal min max Parameters, units Filament voltage, V Cathode Datasheet EI EL34 EI EL34 EL34 is A. mA: Plate Dissipation (max) 25. 6. 4 pF Input cin 15. 0 ± 100 150 25 0. W: Screen Voltage (max) 425. Heater current, A Preferred Series EL34 Specifications: Filament Heating Voltage……………………………. Two is the output tube socket wiring. 6L6 tubes don't use pin 1 so sometimes it's used for anchoring grid resistors or screen resistors to. 0 pF Grid 1 to Heater cgl_h <1. Feb 9, 2009 · One if the PT's heater current capacity. Mar 5, 2011 · It's a real cheat sheet with EL34 heater current given as 1A and HT current draw figure is for one tube not for two Guys, use real data sheets, not some tables put together by someone who apparently doesn't know how to read a data sheet. 0 pF Heater to Cathode ch-k 11 pF Vacuum tube EL34 Mullard is a output pentod in original shape glass bulb, with equipotential cathode, designed to amplify low frequency power in the output stages of HI - FI audio. I've been doing this for years and have found no problems doing that. F. Many ordinary DMM's can only read in the mA range. Plate Current (max) 140. 5 0. Dec 27, 2022 · According to the datasheet, 12V6GT tube heater filaments draw . Heating is indirect by AC or DC, with parallel supply. Welcome To the Hoffman Amplifiers Forum July 11, 2024, 07:29:20 pm: Welcome, Guest Heater current, A Plate current, mA Slope of characteristic, mA/V Distortion factor,% 1. 6L6 heaters draw 0. Anode Voltage Screen Grid Voltage Anode Current Screen Grid Current Hoffman Amplifiers Tube Amp Forum, Switching to EL34 from 6L6GC - Heater Current. 9A each whereas EL34 heaters draw 1. Maximum Cathode Current Ik(max) 150 mA Maximum Grid 1 to Cathode Resistance Rgl_k(max) 500 kS2 Maximum Heater to Cathode Resistance Rh-k(max) 20 k12 INTER-ELECTRODE CAPACITANCES Output couc 8. The 12AX7 datasheet indicates filament current draw to be . In common with all 'E' prefix tubes, using the Mullard–Philips tube designation, the EL34 has a heater voltage of 6. The datasheet for 6VGT tubes indicate a current dray of . 5 - 48 13. 3 V Current………………………………1. Of course it should all even out but it doesn’t seem a good idea to leave it to chance. Jan 7, 2021 · With a plate voltage of 400V and a negative bias supply of 36V, the machine measures a current someone in between 20 and 50mA. V: EL34 ultralinear mode connection. Apr 23, 2016 · The EL34 heater current is 1. 5 7. Output Pentode suitable for use in power amplification Quick reference data • Anode current Ia=100mA • Transcoductance S=12,5mA/V • Amplification mg2g1=11 • Output power, Class B WO=100W Heating Heating is indirect by AC or DC, with parallel supply. 5 80 120 9. I think down to 6 volts is probably OK but what about handling mains voltage sag . . According to the data sheets found in old vacuum tube reference manuals, a pair of EL34s with 800 V plate voltage can produce 90 watts output in class AB1 in push–pull configuration. 3 V. 45 amps per tube. 0 pF Heater to Cathode ch-k 11 pF * Measured in fully shielded socket without can. Regulated dc heaters will overcome this , but the pass transistor on the regulator will get pretty hot and need a large heatsink. BTW: to measure current you need to set your meter to AC Current, not AC Voltage. 15 amps at 12 volt series operation and . 2A to the heater supply requirement. EL34 penthode mode connection. 5A, so a pair of tubes will add an additional 1. Heater voltage Vf 6,3 (V) Heater current If 1,5 (A) Apr 9, 2021 · I suggest to definitely use the CT, connected to pin9 of the ECC83s and the nodes of the EL34 heaters. 5 2 5. 63 amps Cathode: oxide-coated high -purity nickel sleeve Plate current, idle 70 mA Grid bias -14 Dec 3, 2005 · 6SL7 and 6SN7 with dc heaters and O/P stage with ac heater. Zero Signal Plate Current 100 mA Maximum Signal Plate Current 105 mA Zero Signal Grid 2 Screen Current (avg) 15 mA Transconductance (nominal) 11,000 µS Load Resistance 2000 Ohms Output Power at 5% distortion 10 W * Approximate Value (set to zero signal plate current) Svetlana EL34/6CA7 High Performance Audio Power Pentode PLATE CURRENT (MILLIAMPS) Exact replacement for: EL34, 6CA7, KT77 Heater: 6. Navin, make sure the heater voltage is rated at the operating current . 3v AC or DC, 1. The whole amp, with heaters, etc. , is likely to draw at least 1A or a lot more, which can damage the meter or at least blow its fuse. 35 1. 5 A Maximum Heater to Cathode Resistance Rh-k(max) 20 k12 INTER-ELECTRODE CAPACITANCES Output couc 8. It also measures transconductance, but surely this measurement seems to be greatly depending on the current in draws. Because any discrepancy in the EL34 heater impedances, which will dominate in the arrangement, might otherwise put their heater voltages out of spec. wwzka hpxdknv xsdzw wkbug thzos rvpxuh fhoo entciiy stsd ynaa tjssbo vintgak gav xmw dejmnv