Ecc88 heater current. Current for ECC88 is 365 mA.

Ecc88 heater current This new board is a relatively simple low gain buffer using a single 6922 configured as an SRPP stage with anode follower style NFB. Feb 18, 2018 · The 6N1P only has about 1/2 the transconductance of the 6922/ECC88/6DJ8. 6mm thick. ECC83 heater may be wired for 6. The Electro-Harmonix 6922 EHG gold-plated pin vacuum tube is compatible and transposable with the European E88CC/ECC88 and hence perfect for use in any ECC88, 6DJ8, or 6922 amplifier circuit. 7V to 6. They only differ in heater current, the rest of the data sheets are identical as far as I can see. " Cud be. Jun 28, 2010 · "Perhaps you run your heater supplies turned up?" Nope "It just may be that they won't work as well in Solarol's amp if his heater voltage is down a bit. Click to expand Aug 28, 2009 · Hi, I want to draw up a list of valves which are pin compatible with the ECC88 / 6DJ8 type base configuration. At least one says 300mA. No current flows ‘into’ the heater supply from here, so the power valve bias is not affected. 6V on your ECC88's 6. Mind you they draw twice the heater current. Cheers. Cud be they sound great. Please put a schematic in this thread of the amp you are building that calls out a 6922. . The biggest difference seems to be heater current - 330mA (ECC86) vs. I know of the ECC85, 6N1P, 6N2P, but what else? I'm not worried about functional compatibility, or different heater current requirements, I'm just looking for the same pin-configuration. A 100% electrical equivalence exists. Guitarists will surely notice that the EHG 6922 gold pin variant has relatively less fizz than the typical EH 6922. But I think there is no direct link between the heater current and the way a tube sounds. Variations of the heather voltage exceeding the range of 6,0 V to 6,6 V will shorten the tube life. The 6N1P has about 2X the plate resistance of the 6922/ECC88/6DJ8. I would feel safer if the power supply has a delay (for instance by using a damper diode in the B+ line). The 6DJ8 (European: ECC88) (Russian: 6Н23П) (P/N 154-0187-00,154-0305-00) is a dual triode vacuum tube with a B9A (Noval) miniature 9-pin base. For all technical parameters see the Telefunken data sheet. Use of these parameters shall be entirely at the user's own risk. That's exactly the case for ElectroHarmonix (EH) branded tubes sold as 6922. So, any theories? Was the ECC86 just a "selected" ECC88? Anybody know the background of the ECC86? Pete Mar 27, 2023 · This is a much improverd version of ECC88 made, with higher voltage capabilities, higher plate dissipagtion, and better in many many ways. 3 times higher heater current than the 6922 and its siblings. Makes you wonder why the PCC88 was needed at all, if they could make an ECC88 or equivalent with 300mA heater. Arguably, all of these are the same tube with variance in tolerances between triodes and variances between tubes Aug 2, 2023 · The 5670 is tightly specified for heater current (more so than the 6DJ8/6922/ECC88 group). On the flip side, the reduced heater current from dropping a 6922 into the buffer designed around the 6H30 poses no problems for our buffer’s higher capacity Apr 5, 2013 · 6Н23П-EB (6n23p-ev) IS 6922. 8A @ 6. May 2, 2021 · The nominal heater current is 1. If your ECC83 is wired for 12. Oct 16, 2015 · The 5670 is tightly specified for heater current (more so than the 6DJ8/6922/ECC88 group). Dropping Heater Voltage The heater voltage should be kept within +/-10% of its nominal value for optimum valve performance. (*)These specifications are provided 'as-is', with no warranty of any kind. The PCC88/7DJ8 can be used in parallel and series heater configuration. 3V-rated heaters. Some tubes can pass more cathode current, so they need more electron emission. 3V! Interestingly, there are variants of the 6HS5 like the 6HZ5 with 2. These have lower noise, and less distortion. The 6922 is used worldwide from demanding Hi-Fi amplifier manufacturers seeking for highest consistent quality and lifetime. So that gives us options of 6dj8, ecc88, 6922, e88cc, cv2492, cv2493, e188cc, 7308, CCa, 6n23p, and 6n11 which are all very nearly identical, as well as the 7dj8, and pcc88 that differ in heater voltage but are otherwise the same. But only 10% different I have dropped the ECC88 into circuits designed for ECC86 and they work very well, almost identically in fact. It looks like R13 is not controlling the current, but R10 is. 3A series heater current versions of the ECC88 / 6DJ8. Apr 20, 2023 · Looking at different data sheets for ECC88, E88CC and 6DJ8, the heater current varies. " TD had pointed to an iFi article about the tube and that's what lead me to buy them. "The heater requirement is why they go for less than a 6dj8 et al. 3V at 300mA or 12. Heaters can be connected in series or parallel using jumper links (total heater current must be less than 1. Cudda been that 6ES8 couldn't be used as a replacement for 6922s in my phono amp. What makes the ECC88 stand out among the others is the rather high transconductance of 12. Oct 28, 2015 · The E288CC at bias point has a much higher gm, a much higher anode current, a much lower mu and twice the heater current than the ECC88/6DJ8, E88CC/6922/6N23P and E188CC/7308 which are - but for minor details and permissible dissipation per anode - very close to each other. 365mA (ECC88). However, they bias not as trhey shouls in all circuits, and have slightly lower gain. Jul 8, 2010 · ECC83 mu is rated at 100 (very high). 5 mS of transconductance with a plate resistance of about 2. The max plate voltage of 6N1P is 300 v, and for ECC88 it is about 130, so that is something to consider if someone are to replace 6N1P with ECC88/6DJ8 Nov 3, 2021 · The heaters in your circuit than would be at 209 V (or probably even higher) while the cathode still is at 0 V (or maybe better: is still kind of floating). Oct 16, 2024 · 6DJ8 Vacuum Tube. How much sonic difference will be present, if any, in a buffer (cathode follower), when the tube is "rolled" is, indeed, a question. 3V heater which consumes only 300mA. Sep 27, 2021 · The pinout is shown on the left. I would avoid 6922, especially chinese ones. As previously stated, your mileage may vary when using a 6N1P in a circuit that was designed for a 6922/ECC88/6DJ8. If you have a dc regulator with LM317 you can fix it at nominal voltage without any problem for both id. Figure 3: 6DJ8 (ECC88) Valve Headphone Amp Power Supply Schematic. Get russian 6N23P-EV or NOS ECC88. That probably would not be good. 3V, but to my consternation, 4 out of five drew 2. I believe that using alternating current (AC) on the tube heaters would also be just fine, but since I have the PCBs and components to get the DC, that is what I used. 5A @ 6. 5 mS. 6V at 150mA. Aug 17, 2002 · * The 7DJ8 / PCC88 are the 0. 2A owing to track thickness); Output over-voltage protection is catered for -this is essential yet all too often ignored even in 'professional' designs; The PCB is 10 x 15cm, and 1. Jan 8, 2007 · The V1 on those amps was a 6n1p, which is quite similar to the ECC88, if you ignore the way a 6n1p eats heater current. 6V). Electrical Characteristics: The ECC88 (also known as 6DJ8) has a lower filament current (300mA) compared to the 6N1P (600mA). 3V heater, and the 6HV5(A) with 1. Selected for perfect balanced audio output and lowest noise. As the prefix 'E' indicates it has a 6. 3V heaters that means 5. Any Amplifier/Preamplifier/DAC using the 6DJ8/6922/ECC88 Group tubes should provide enough heater current for the stated maximum and should work fine with the 5670. All the boards plug into a motherboard carrying the heater supply buses. Cathode Current 20 mA TAD 6922/E88CC Premium Select High-Mu Twin Triode The TAD™ 6922/E88CC: is the High-End-Version of the ECC88 or 6DJ8. I never really used the ECC88 much in any of my own projects. Replacing a 6922 with a 6H30 will almost certainly overload that device’s heater power supply since the 6H30 requires 2. This means that swapping an ECC88 with a 6N1P in a circuit without proper adjustments can overload the power supply. 3V. Current for ECC88 is 365 mA. The remaining parts of the Red bear designs are quite orthodox, using 6n2p (like a 12AX7, but different pin-out) and 6L6/5881 types for the output stage, so it might be worth looking if you really want an example of how to use Mar 18, 2014 · The heater current depends on the cathode size. 4A @ 6. Apr 26, 2017 · Be aware that ECC88 and E88CC have different heater current, and modern versions could have either or somewhere in between - the name printed on the glass might not be a reliable guide to current. With 15 mA of plate current, 90 V plate-to-cathode voltage, and −1. The Heater voltage is 7V. The tolerance of heather current (column II) should be taken into account. The generic tube of 6N1P is ECC88, which was originally designed as a medium voltage tube (90Volt) for measurement equipment, with very high linearity and low distortion, such as required for oscilloscopes. Apr 19, 2023 · Some datasheets for E88CC states the current for filament is 300 mA wheres others says 365 mA. Sep 9, 2014 · The power supply provides direct current (DC) for the tube heaters and a well filtered B+. Apr 13, 2015 · 6N1P also needs a heating current about twice the heater of ECC88. Reducing R13 drastically doesn't seem to increase the current in proportion, R10 = 470 and R13 = 1k gives about 5ma of current. 3k and 105v supply, I should get about 31ma, but I get half of that, about 15ma. Sep 23, 2013 · This uses 12V heaters and the main amplifier PCB uses a 12AX7 plus a couple of 6922s with their heaters wired in series. Apr 20, 2016 · The current calculations also don't look correct, with 3. Any amplifier/pre-amplifier/DAC using the 6DJ8/6922/ECC88 group tubes should provide enough heater current for the stated maximum and will work fine with the 5670. 5 kΩ. 9V, though it is even better to stay within +/-5% if you can (6V to 6. 3 V grid-to-cathode, the 6DJ8 provides 12. 6V heater and you drop in an ECC88, you'll be putting 12. For 6.