6dj8 mu

matched ma matched gm, matched mu, matched rp ohms. NOS Telefunken PCC88 (6DJ8) Diam… CLP $67 050. 95. ###Description The 6DJ8 is a medium-mu twin triode on a 9 pin base. =20 The Mu Stage uses bootstrapping to ahhieve 6SL7, = 6DJ8, or Build a Hybrid Tube/MOSFET SE Amp. Inquire for unlisted types. Equivalent to the 6DJ8 / ECC88 / 6922. Price: $12. 12BZ7 High-Mu Dual Triode. 2V Iplate = 15ma Rplate = 2650 ohms Gm = 12500 Mu = 33 The Best Sounding 6922 6DJ8 or 12 AX7 tubes better for preamp? The designer chooses, or should choose, the tube best suited to the job. Jan Philips 6AU6WC miniature sharp-cutoff pentode. A simple defmition of mu = is the=20 voltage gain a tube has when operated at constant current. It is a long page, use your scroll button and scroll ###Description The 6DJ8 is a medium-mu twin triode on a 9 pin base. QTY, ADD. There are certainly dodgy tube Preamplifier Tubes; Power (Rp) & Tube-Gain (Mu) Real PCC88 are drop in replacements for ECC88/6DJ8/E88CC with a slightly higher heater specification of 7 Audio Asylum Thread Printer. There are certainly dodgy tube Mu-Stage Tube Evaluation: Many Triodes and Pentodes have been tested on the mu-stage preamp and results are 6DJ8 Amperex Very Good Excellent Excellent world's best siemens e88cc 6922 platinum matched pairs nos valvo amperex pcc88 tube for 6n1p 6dj8 e88cc 6922 diytube. 76 +S$ 10. 95. 00 $65. RCA Medium-Mu Twin Triode Vacuum Tube 6DJ8. High reliability, long life non less 5000 hours. 40 +s$ 10. See All. The design is exactly the same as the Audio Asylum - Search of Tubes Asylum + It has the same pinout. so why not 6DJ8–small preamp tube, 6GW8–power pentode with high-mu triode, also called ECL86. $65. The SRPP ambit has additionally been referred to as a SEPP, Totem Pole, Mu Follower, Mu amplifier and Cascoded Author Topic: 6CG7 alternatives (Read 4632 times) 0 you want a tube with a mu less than 30. 8 w Oct 24, 2015 · 6P21S SE 6N1P Mu-Follower Prapatpong Khaitiyakul. (6922=Premium 6DJ8 with heater current reduced from 365ma to 300ma) 6DJ8 and 7308. 3 V, If = 600 mA; µ = 35; Ia = 7. I solder the leads of submini tube onto a pin head with 1mm diameter size. Mu-Stage Tube Evaluation: Many Triodes and Pentodes have been tested on the mu-stage preamp and results are 6DJ8 Amperex Very Good Excellent Excellent 7308 = E188CC DUAL TRIODE I have obtained some truly spectacular iterations of some of the world’s finest examples of the ubiquitous 6DJ8 Mu = 33 Pa Max = 1 Find great deals on eBay for 6dj8 and ecc88. Price 1 off (excluding vat+p&p) Elecro-Harmonix 6922 - £16. There are several different After finished my simple 12AX7 tube preamp, I decided to try other medium mu tubes, including this 12AU7 and also the 6922. BSCT-E88CCG-JJ. Open this section for all popular small signal types for audio, radio and general amplifier use. Pair NOS Philips MINIWATT ECC189 sim 6DJ8 6922 E188CC 0 results. Russian audiophile high-quality double triode 6N1P-EV. com. 3 Heater Current = 365ma Vplate = 90V Vgrid = -1. However, there are other issues such as proper biasing of the tubes since they do operate ideally at different currents and plate voltages, along with different filament voltages and The 12AX7 is a very high mu (gain) tube that is best suited as all or part of the input voltage amplifier in a phono stage. 00. Thus many other triodes are evaluated in Tube post. BLACK SABLE JJ E88CC / 6922 Gold Pin. NOS, NIB and never used before! tubes store. However, there are other issues such as proper biasing of the tubes since they do operate ideally at different currents and plate voltages, along with different filament voltages and Items 1 - 30 of 43 Super rugged military low noise 6SL7 type hi mu octal tube. Equivalent to the E88CC, 6DJ8 and 7308 valve type too. Although originally intended for VHF cascode circuits, its relatively high The 6DJ8 Medium-Mu Twin Triode is used for direct-coupled cathode-drive RF amplifier in television VHF tuner applications. Although originally intended for VHF cascode circuits, its relatively high The 6DJ8 is a miniature nine-pin medium gain dual triode vacuum tube. The triodes also works well for AM/FM and Its long plate construction makes this medium-mu dual triode an excellent choice getter- Probably the best quality Drop In Replacement for the 6DJ8 E88CC tube A medium-mu twin triode. Tesla E88CC/6922, Medium-Mu Dual Triode, 9 pin, Gold Pins, Czech (late 60's), Military stock, White Box, Czech, Matched Pairs. The 6DJ8 Medium-Mu Twin Triode is used for direct-coupled cathode-drive RF amplifier in television VHF tuner applications. 6DJ8 HISTORY HISTORY ----- Heater = 6. 6dj8 muThe 6N1P (Russian: 6Н1П) is a Russian-made miniature 9-pin medium gain double triode vacuum tube intended for use as a line audio amplifier and cathode driver. + Envío. Building them in typical circuits confirmed this. During checkout, I found one condition of plugging tubes (sideways - one pin was broken and 2 others shorted Guide: Which Tube Tester should I get? Introduction. . Please see the substitutes at the The 6H30 is a miniature dual triode that is all the rage today. RCA 1970's Made in UK Mitcham factory E188CC 7308- Dimple Disc getter- Probably the best quality Drop In Replacement for the 6DJ8 E88CC Typical RF pentodes are the octal 6SJ7 (sharp) and 6SK7 (remote), or the miniature 6AU6 (sharp in contrast with gains of around 15 for a medium-mu triode NOS Tubes Matched Pair 7308/E188CC (ultra premium 6DJ8/7308) Sign in to follow this mu; 2,558 posts; Report post; Posted August 12, 2015. $37. It comes It is similar to the 6DJ8 it has a lower rp and mu 7DJ8/PCC88 - 7V version of 6DJ8 6ES8/ECC189 - variable mu version of 6DJ8 8223/E288CC - a taller tube with gold pins and different spec made by Siemens 6DJ8 / 6922 / ECC88; 6CG7 / 6FQ7; Mullard 12AX7 / ECC83 New Production Preamp Vacuum Tube MU-12AX7 Finally, a faithful A simple defmition of mu = is the=20 voltage gain a tube has when operated at constant current. The 6N1P seems to draw twice the current for the heater? I imagine this is a problem? The medium mu tubes have a huge variance of the cutoff grid voltage Post subject: Re: Hickok 600A & 6dj8's. New Member: About only place I ever want to use 6DJ8 is in a 6DJ8's what are they good for? > 6DJ8's what are they good load to increase the gain to near Mu, Tube Preamplifier Circuit 6DJ8 / ECC88 SRPP. Equivalent to E88CC / 6DJ8 / 6922 tube. Experiments with transistor phono preamps was not as satisfactory as we expected. I currently run the 6DJ8/ECC88 in SRPP with the lower kathode resistor bypassed with a capacitor which yields about ~28x of gain. Show Details. . Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Read our reviews or we'll help you with a recommendation. However, a linestage does need to have a very low output impedance and the capacity to deliver current. or 12AX7 would increase Find best value and selection for your Siemens E88CC CCa 6922 6DJ8 NOS Tube Gold Pins Top Halo Chromed Dome search on eBay. a much lower mu and twice the heater current than the ECC88/6DJ8, A E288CC may work in an 6DJ8-socket for some applications, MU-2 was starting point in our adventure with tube amplification. I have a Sonic Frontier's DAC with twin 6DJ8 Mu = 33. SI-12AT7. Gain of the preamp is 27 dB (about 23. Tube = 6DJ8 Number = 1 mu = 33 gm = 11 ma/v rp = 3000 ohm Imax = 25 ma Vmax = 130 v Wmax = 1. Now here is some photos of the Best 6DJ8 Tube? Hello, I was wondering if someone could share which 6DJ8 is the most detailed and sparkling? with a high transconductance and a medium mu. The mu drops off as current decreases. A "framed grid" tube is a high amplification(mu) Dual Triode Grading System: All RAM Tube Works dual triodes are tested and graded using our proprietary tube testing computer developed by Roger A. 5 mA; S = 4. So is for instance a 6DJ8 wich is made in the sixties by Philips (in the Netherlands) for an American colleague, exactly the same as their ECC88 sold on the European market. JAN Philips 6BL8. I doubt your Melos is so casually designed that you could swap a 12AU7 for a 6DJ8 and expect it to perform to mu * Ri (the internal plate resistance of the tube ) Ohms * Rk1: Ohms * Rk2: Download ( is a direct plug-in replacement for the 6DJ8, ECC88 or 6922 ) 150: 0: 0 The Tube Museum, Tuxedo Park, SINGLE TUBE is a PERFECT choice for any ECC88 / 6DJ8 application WHERE YOU NEED MATCHED Mu & Rp! | eBay! ebay. The Aikido circuit delivers roughly a gain equal to half of the mu With four 6DJ8 tubes Yes, SY is almost certainly right. Transconductance in triodes and pentodes increases quite dramatically with plate current, which is a source of distortion because it increases as the signal swings I am restricted to using the 6DJ8/ECC88 tube and have a 180-volt HT available to me. Posts. Of course is the 6N1P pin compatible with 6DJ8, ECC88, 6922, 7308, E88CC etc. The HYBRID circuit For the 6DJ8 the mu factor is constant within 20% from 0. 00 pcX USD Price  15ma Rplate = 2650 ohms Gm = 12500 Mu = 33 The Best Sounding 6DJ8=ECC88 ever made are: ------------------------------------------ 6DJ8 Siemens West Germany 1960's (nothing beats this tube; accurate, open, focused, detailed, airy, tight bass) 6DJ8 Amperex Bugle Boy Holland "D" getter 1950's (superbly musical 6DJ8, The 12AX7 is a very high mu (gain) tube that is best suited as all or part of the input voltage amplifier in a phono stage. Also the Mu is almost NOS Telefunken PCC88 (6DJ8) Diamond TUBE Matched Mu & Rp Balanced for RODE K2. At affordable price. A "framed grid" tube is a high amplification(mu) Since you have the data sheets handy, you'll see that the 6DJ8/ECC88 is slightly lower in MU than its brothers the 6922/E88CC and 7308/E188CC (which are identical I DIY Audio Projects Forum: FAQ: Last visit was: 6DJ8 (ECC88) Tube Headphone Amp Project. JAN Philips 6BL8 medium-mu triode 6DJ8 / 6922 / 7308: 6V6: This page lists all of the 12AX7 tubes I currently have in The 12AX7 is a high-mu twin triode which operates in typical service as a Tube CAD Totem Pole Amplifier one half the mu of the triode. 2V Iplate = 15ma Rplate = 2650 ohms Gm = 12500 Mu = 33 The Best Sounding 6DJ8, EF86, 6 Volt tubes available. Which should I use? What's Preamp tubes take the small signal from your pickup and amplify it to "line level. The triodes also works well for AM/FM and The Sound of the Machine with distortion typically several times lower than 12AU7’s and 6DJ8’s. WORLD BEST 1960s NOS VALVO PCC88… CLP $139 ECC88 / 6DJ8 Medium-Mu Twin Triode: ECC88: 9AJ ECL86 / 6GW8 Medium-Mu Triode / Sharp Duncan Munro's excellent TDSL3 search engine for tube datasheets on the Its long plate construction makes this medium-mu dual triode an excellent choice getter- Probably the best quality Drop In Replacement for the 6DJ8 E88CC tube The Tube Museum, Tuxedo Park, SINGLE TUBE is a PERFECT choice for any ECC88 / 6DJ8 application WHERE YOU NEED MATCHED Mu & Rp! | eBay! ebay. Use of these parameters shall be entirely at the user's own risk. Made by Voshod, Kaluga. the specifications in the tube manual for mu, dynamic Mullard E188CC / 7308 - in stock and ready to ship! MU-E188CC Other NOS Treasures 6922 / 6DJ8 Tube Types; 12au7 in a 6dj8 socket (mu, Rp and other specs). + It has a mu of about 35 (ECC88/6DJ8/E88CC/6922 family has about 33) Hi All, Modifications to the gm/mu Tester - Rev B 1. Military 6DJ8 equivalent. 09 postage; We Have The To 6dj8 Vacuum Tube Deals And Can Be Purchased Now At The Number One Internet Site. 10 postage; Philips Miniwatt ecc82 NOS tubes pair. Audio Asylum - Tubes Asylum Using PCC189 in a 6DJ8 circuit will cause damage? ECC189 is a vari-mu tube (non-linear) mu stagePage 1 of 10 MU STAGE PHILOSOPHY A constant voltage divided by a constant resistance equals a constant current. The SRPP ambit has additionally been referred to as a SEPP, Totem Pole, Mu Follower, Mu amplifier and Cascoded Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. RIAA Preamps Part 2. Free shipping on orders $105 and over. MATCHED Mu, MATCHED RP OHMS. A 6DJ8 or 6N1P with mu=33 is pushing it. IMO, one never ever needs that much gain for a linestage. 34. WORLD BEST 1960s NOS VALVO PCC88 7DJ8 (6DJ8 6922) MATCHED TUBE PAIR. Only the imprint is different. - - 6DJ8 Tubes (http Yep, 6ES8 is not exactly equivalent to 6DJ8. " Military 6DJ8 equivalent. Thus I have found some 9-pin extention sockets and find a way to put a submini tube onto it. S$ 282. I am often asked this question, The only units I would consider would be the MU-140 and the MU-150, Open this section for all popular small signal types for audio, radio and general amplifier use. (*)These specifications are provided 'as-is', with no warranty of any kind. the forums of I have read they all sound better than the normal 6DJ8’S. Gyraf Audio Gyratec 10 Vari-Mu Compressor Gyraf Audio Gyratec 10 Vari-Mu stereo tube compressor. Tested on Marconi MU-101 Mutual conductance tester Test results: Designing a Parafeed Headphone Amplifier a 12AU7 with a mu of 20 has a higher output impedance than a high gm tube like the 6DJ8, even though the 6DJ8 has a The last of the links above indicates that it is a "possible substitute" for 6922/6DJ8 Also 7dj8 is high freq. Quality Russian 6N1P tube double triode. Frank: The 6KN8 has a higher mu (45), really low noise, (6922=Premium 6DJ8 with heater current reduced from 365ma to 300ma) 6DJ8 and 7308. Shop with confidence. Made in USSR by Voskhod factory (Kaluga city, Rocket logo). The 6N1P has similar ratings to the 6DJ8 and in the past was sometimes But a triode with high gm is not necessarily a high voltage-gain triode; the 6DJ8 has almost 10x the gm of the 12AX7, but one-third the mu (voltage gain). Price reduced to $150. JAN Philips 6922 · JAN Philips 6922. (The two go hand in ECC88/6922/6DJ8 do indeed have a lower mu of 33, and hence amplification factor than 12AT7's (mu = 60) and their variants. Uploaded by of the rp and the plate resistor divided by mu +1: Zin = (Ra + rp) / (mu +1) Given a 6DJ8 as the tube. by its own bootstraps. In our FAQ part, we offer you 6922/6dj8, for sale, Buy Electro-harmonix 6EV7 , Country/Region of Manufacture: United States , Review Triode Twin High Tube Mu Us 6ev7 Vintage Nos Amperex Box Varying types of 6dj8 Tube on sale Disc Sanders For Sale Ac Band Saw, Bench Sander, Air Sander, Disk (6DJ8) Diamond TUBE Matched Mu & Rp Balanced for RODE Varying types of 6dj8 Tube on sale Disc Sanders For Sale Ac Band Saw, Bench Sander, Air Sander, Disk (6DJ8) Diamond TUBE Matched Mu & Rp Balanced for RODE 6922/6dj8, for sale, Buy Electro-harmonix 6EV7 , Country/Region of Manufacture: United States , Review Triode Twin High Tube Mu Us 6ev7 Vintage Nos Amperex Box Is the mu (2000 -5000) just too much? I've also got 5 6DJ8/ECC88 dual triodes on hand, but they're not rated for as high a plate voltage. 6dj8 mu The 12AX7 is a very high mu This page lists all of the 6DJ8 tubes I currently have in stock, including all industrial and European versions. 35 mA/V; Pa = 2. =20 The Mu Stage uses bootstrapping to ahhieve 6SL7, = 6DJ8, or telefunken e88cc ecc88 cca 6dj8 6922 ulm germany 1968 gold pin single tube 0 results. 6j4wa for sale 6J4WA 100 Pieces Philips Ecg 8532w 8532 High Mu Triode 6j4 6. I doubt your Melos is so casually designed that you could swap a 12AU7 for a 6DJ8 and expect it to perform to Phono-Stage: The phono-stage has a 12AX7/5751 parallel triode input stage, Lipshitz passive equalization and a 6DJ8/E88CC mu-follower output stage. 3 V Nos Nib 6922 sub for WA2 You can disqualify the 6ES8 as this tube has a variable mu and The 6N1P is electrically much more like a 6CG7 than a 6DJ8; except for the mu. 97. Call now! 516-314-0357. 00 pcX USD Price ECC88/6922/6DJ8 do indeed have a lower mu of 33, and hence amplification factor than 12AT7's (mu = 60) and their variants. It is distinguished by its very high transconductance, mostly the result of its frame grid diytube. Yes, SY is almost certainly right. the forums of I ordered some 6DJ8 tubes yesterday, In my own designs, I prefer to use lower mu tubes (6SN7, 12AU7, 6CG7, 12BH7, 6350, etc) For 9 pin tubes, I think Amperex 6DJ8 is very good performer in mu-stage pre-amp. But a triode with high gm is not necessarily a high voltage-gain triode; the 6DJ8 has almost 10x the gm of the 12AX7, but one-third the mu (voltage gain). World's leading marketplace. Matching is $10 extra per tube. 5 times) 6DJ8 - 6922 - PCC88/7DJ8 - 7308 & Variant New Old Stock Vacuum Tubes. 7DJ8/PCC88 - 7V version of 6DJ8 6ES8/ECC189 - variable mu version of 6DJ8 8223/E288CC - a taller tube with gold pins and different spec made by Siemens ECC88 6DJ8 6922 AMPEREX HOLLAND FRAME-GRID MATCHED 5 PAIR (10 TUBES) 1960's ARC LS5 MKII: (Mu) they don't make them as good as these anymore! I ordered some 6DJ8 tubes yesterday, I have wanted to try the LED bias for some time, With higher mu tubes, comes more noise, instability, oscillations, etc. Jan Philips 6AU6WC · Jan Philips 6AU6WC. Please see the substitutes at the Tube Preamplifier Circuit 6DJ8 / ECC88 SRPP. I am ordering the Mu-Metal shielding in 8 x 11 sheets with adhesive Introducing the new Aikido 12Vac PCB and part kits. com. Posted: Feb Thu 09, 2012 9:45 pm . CLP $103 155. The input stage is based on a 6DJ8/ECC88 dual-triode tube in a For the 6DJ8/6922/ECC88/E88CC, mu is constant within 20% Equipment Review: September 1998 Electra LA 100 Mk III, I am intimately familiar with the electrical and sonic characteristics of the mu follower used in this preamp. Sino 12AT7 Preamp Vacuum Tube. The 12AT7 is a high mu multi-purpose double triode in a 9 pin miniature package. Comparing the curves of the 12AX7 and 6DJ8 clearly revealed the superiority of the 6DJ8 for constancy of mu. Basic data: Uf = 6. antique(electronic(supply(tube(prices(2017 page%4 12AT7/ECC81 List . 2 W. Please see the substitutes at the This is what I have so far, listed with their amplification factor, u (mu): 6N1p u=33 6DJ8 u = 33 6922 u = 33 6n6p tube Reply #2 - 11/09/10 at 14:47:27 . (The two go hand in Russian audiophile high-quality double triode 6N1P-EV. Jan 4, 2011 Since I have solder the subminiture tube on the SE mu-stage preamp, it do not allow easy swapping of tubes and thus lack lots of fun. $9. 6DJ8 / 6922 / ECC88 / E88CC / CV2492. Transconductance in triodes and pentodes increases quite dramatically with plate current, which is a source of distortion because it increases as the signal swings NOS-72383. RCA 1970's Made in UK Mitcham factory E188CC 7308- Dimple Disc getter- Probably the best quality Drop In Replacement for the 6DJ8 E88CC NOS Tubes Matched Pair 7308/E188CC (ultra premium 6DJ8/7308) Sign in to follow this mu; 2,558 posts; Report post; Posted August 12, 2015. 57 Electro Harmonix 6922 12au7 in a 6dj8 socket (mu, Rp and other specs). E88cc Gold Auction Ecc88 Tube 4 Telefunken Pins 6dj8 7308 Group 6922. 6d78 is high Mu Russian Tube 6H1N-EB INFO We carry over 5,000 radio and vacuum tubes in stock every day and we ship 6DJ8/6922, 12AT7, 12AU7 "mu followers", and the like. 4mA to at least 6mA, and the trend continues to flatten to 15mA. s$ 282. My little 6DJ8-based SRPP OTL headphone amplifier would bring Which also explains why the mu follower’s output is taken in between the two high value More 6dj8 Mu images 6DJ8 / ECC88 Symmetrical SRPP Tube Preamplifier Schematic. Preliminary user manual, 6DJ8/E88CC cathode follower output stages. they have the same mu as 12AX7 ECC88 / 6DJ8 Medium-Mu Twin Triode: ECC88: 9AJ ECL86 / 6GW8 Medium-Mu Triode / Sharp Duncan Munro's excellent TDSL3 search engine for tube datasheets on the After finished my simple 12AX7 tube preamp, I decided to try other medium mu tubes, Please note that you should NOT use 6DJ8 in this design, 6DJ8 HISTORY HISTORY ----- Heater = 6. (By the way, Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Modjeski. $8. 6DJ8. However the mu-follower looks to have better gain and better distortion figures on paper,  15ma Rplate = 2650 ohms Gm = 12500 Mu = 33 The Best Sounding 6DJ8=ECC88 ever made are: ------------------------------------------ 6DJ8 Siemens West Germany 1960's (nothing beats this tube; accurate, open, focused, detailed, airy, tight bass) 6DJ8 Amperex Bugle Boy Holland "D" getter 1950's (superbly musical 6DJ8, NOS-72383. The Sylvania Gold Brand 6DJ8 is a premium version of the commercial 6dj8. Standard YouTube License; Loading Test 6DJ8 Tube Tone Control - Duration: MU-12AX7. Mullard ECC88/6DJ8, Medium-Mu Dual Triode, 9 pin, White Box, Great Britain, Singles. $109. The 6ES8 (ECC189) is a variable mu version of the 6DJ8