Electra print amplifier. They are in very fine condition.
Electra print amplifier. of floating para-phase, phase splitter, features related to not having to use matched tubes. I'm going to use a version of the classic J. Oct 2, 2007 · I'm thinking to use this design because I will have the preamp "close" to at list 2 meters from the amps (monoblocs) and I figure that those trafos give me output impedance that stays constant at any position of the attenuator on the same frequency response at any volume setting. Under the Electra-Fidelity brand they market many of Jack’s designs, all of course featuring his very own, hand-wound Electra-Print transformers. 3 Kohms Max Current - 125 mA Max power out - 20 Watts Dec 14, 2012 · Electra-Print Single Ended 45 Stereo Tube Amp. Dec 4, 2010 · I happened to own Electra Print 300b monoblocks (2 300b per side) and what I assume is UltraPath Line amp - preamp with 6j5 signal tubes and 5v4gt rectifier tube. 33mH choke Jul 11, 2007 · I've read the Electra-print article on A2. Bought it from another CA member. This is my opinion: It has bits of truth, alternative explanations to what is really going on (shifting bias), a solution to a problem (shifting bias) but fail to tell the real solution (don't use a coupling capacitor in A2), compares two completely different things (chips drivers with FB and tube drivers without FB) and leaves out key issues Electra-Print PVA Pre-Amplifier Unit (The Macabre Knob) electra-jack Electra-Print 15k To 8 Ohm Partial Silver Secondary Audio Output Transformers (#225601504636) The amplifier is using Electra print 7k/8 ohms low IMD custom transformers and LL2753/30mA as interstage. Morrison design with a direct coupled 6SN7 driving it. 5 Watts(seems like 20 Watts). Electra-Print 211 amplifiers 0 Members and 1 Guest are viewing this topic. Electra-Print PVA Pre-Amplifier Unit (The Macabre Knob) electra-jack Electra-Print 15k To 8 Ohm Partial Silver Secondary Audio Output Transformers (#225601504636) Your best bet would be to contact Jack Elliano at Electra Print. Jan 8, 2014 · In order to prevent the low frequency distortion signal from being dissipated into the power supply, we need to isolate the power supply from the amplifier (point A in particular). I decided to try them in a PP EL84 amp. The dynamic presentation is convincingly that of an amplifier many times greater than it's rated power output. I found the Electra-Print 3634-2 was reasonably priced and high quality. My perception is that digital sources (a Sony CDP-302 and a RaspberryPi with a AD1868 DAC HAT card) sound much cleaner, with more instrument detail and better levels (frequency response). com that has his recent article on the PVA. Instead of using the 6EM7/GL7's low-mu triode as a cathode follower, I put the Electra-Print transformer on the triode's plate, and use it to directly drive the grid of the SV811-10. You could also order a back issue of AudioXpress from audioxpress. The SSE amp uses EL34's which are a much bigger octal tube. com PVA Passive Audio Pre-Amplifier Electra-Print. Electra-Print still in business? diyAudio Community diyAudio Store. See also 1952 adverts. They will run at 100 mA, but that is really too much. I use the Electra Print 3k ohm transformers and run the tubes at 260V @ 52mA; Eg = -47V. C. Apr 19, 2021 · The SSE amp does not use EL84's, the SPP does. 7k ohm with high wattage ( high 160 MA ) Multi taps secondary from 2 ohms to 32 ohms ( color codes available ) for we300b types vacuum tubes ( yes it works with regular Feb 20, 2011 · These transformers will optimally load op op-amps for best performance. They certainly have sufficient bass in my application. tnc . Jan 29, 2021 · I have had Electra-Print transformers on my SE 2A3 amp for over a decade and really like their performance and sound. member since January 2007. Here is original add description: "Loftin-White 2A3 Single Ended Triode SET DRD directly coupled custom tube amplifier making 3. The Edcor CXSE25-5K is a good choice for an EL34 amp. When Albert wanted his transformers back, I called Jack at Electra-Print and explained that Albert P had recently ordered a set of transformers and I wanted a set just like them. Therefore I am able to use an Electra Print PVA with this amplifier. Sep 23, 2017 · George at Tubelab has a reviewed quite a few, and rates Edcor quite highly. I spent several hours last night cranking an UNSET based SE amp running 6AV5 TV Electra-Print Electra-print Ep 284 // Custom Stereo Tube Amplifier Sold Jun 29, 2010 · Electra-Print. These constant current load input transformers are designed to turn a voltage input into current output. I happened to own Electra Print 300b monoblocks (2 300b per side) and what I assume is UltraPath Line amp - preamp with 6j5 signal tubes and 5v4gt rectifier tube. A pair of Cain & Cain Abbey’s fills the speaker slot. 4 resulting in a peak voltage of 420V maybe a bit higher, considering no load until the tubes warm up and the possibility of your local power company line voltage being higher than normal. We listened to the amp with the custom Electra Print transformers, then substituted each of the test transformers into the amp using clip leads. The 300Bs and the transformers made some rather rude noises during that part of the sine sweep. Specs: Primary Impedance - 3. The transformers have been in storage for 15 years. I'm looking at Electra-print 100ma, 15W copper into 8ohm secondary. Oct 13, 2014 · Electra-Print. Electra-Print Audio manufactures a variety of audio output transformers and audio chokes. SOURCES EAD T-1000 transport, Audio Magic Kukama DAC, Galibier Serac with graphite platter, Rega RB 251 with Incognito rewire and Pete Riggle Audio Engineering 12" String Theory Tone Feb 6, 2024 · One pair of very nice Electra-Print ST3KB output transformers. The Aries-845 amplifier produces 40 watts, and is designed to drive medium as well as high efficiency speakers. All our transformers are hand crafted using the finest wire and lamination materials. com Single-Ended Output Transformers A single 6 ohm will offer best bandwidth and match 4 and 8 ohms. The preamplifier project uses Electra-Print handcrafted transformers, which the company manufactures for its own high-fidelity Feb 13, 2006 · The Electra Print amplifiers are fed from an Electra Print PVA pre amp. Mar 31, 2021 · In this article, Jack Elliano the founder and principal designer behind Electra-Print Audio, details a simple but very interesting concept of a line amplifier using step-up transformers plus a variable gain control, offering usable results from low impedance sources. MY main issue with the amp design is the very high voltage it operates makes getting the power transformer rather cumbersome instead of allowing some standard off the shelf parts. Aug 18, 2010 · Electra print has two schematics (and the needed iron) for a class A2 amplifier (PP and SE). Gallery Archive Articles. These transformers convert the voltage signal of a source unit into a current style of output signal, which is then passed on to an amplifier. The big Edcors and Hammonds, the XSE15-8-5K and the champ transformer. " I don't know what the current rating for the 171 c is or what current will run through this circuit if if hook the amp up for 20 watts using the higher plate voltage. The PVA is a passive design that uses a pair of nickle core transformers for impedance buffering, and does provide a small amount of signal gain. In this article, Jack Elliano the founder and principal designer behind Electra-Print Audio, details a simple but very interesting concept of a line amplifier using step-up transformers plus a variable gain control, offering usable results from low impedance sources. I bought the output transformers from Electra-Print / Jack Elliano in 2006. com 6BX7 SE Amplifier I have started to attempt to translate the schematic into a design (on a sheet of paper), but the thing I don't quite understand is how to make this into a stereo amplifier. According to Tony the A3-500 amplifiers are the first Electra-Fidelity amplifier to use Jack Elliano’s proprietary Class A3 design with Low IMD circuit. The Electra print site seems to be suggesting a benefit in stepping up from the low impedance of an opamp output to the higher impedance of a tube amp. Jul 15, 2021 · With the PVA-2n based passive preamp replacing a Schiit SYS passive preamp (10k audio taper pot with switchable inputs), my system sounds amazing. com 300B DRD Audio Tube Amplifier Might be the same as the Welborne Labs version, might not. com Special Use Transformers $60 including shipping. Magna Quest, Transcender, now Electra-Print. SOURCES EAD T-1000 transport, Audio Magic Kukama DAC, Galibier Serac with graphite platter. Uses two matched EL84's and one 12AT7 each channel. Trial Offer. For those who wish to hear these fine amplifiers in their system with the security of being able to return them should they not perform to your expectations, we are offering a 15-day trial program (discounted pricing, sales offers, or other promotions are excluded from the Trial Offer). Chief Designer and Owner is Jack Elliano. SOURCES EAD T-1000 transport, Audio Magic Kukama DAC, Galibier Serac with graphite platter, Rega RB 251 with Incognito rewire and Pete Riggle Audio Engineering 12" String Theory Tone Nov 16, 2022 · WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES. 85lb tank with huge Electra Print transformers, hard wired, and utilizes Jack Elliano's new class A3 circuit which produces incredibly low distortion. com PVA Passive Audio Pre-Amplifier. Source duties are taken care of by a Sony SCD-CE595, which has been modified by Tube Research Labs. CABLES Audio Magic Illusion 4D interconnects, speaker cable, and digital cable and Audio Magic Extreme series power cords. Apr 5, 2024 · Push-pull EL84's stereo amplifier, floating para-phase. The listening session consisted one of my Tubelab SE amplifiers running 300B tubes. The source component used for this review is a Sony 595 cd player that has been modified by Tube Research Labs. Electra-Print customers are world wide. Aug 8, 2008 · Blackeye, Hard to read the smallish print but it appears that the power transformer has a 300-0-300 volt secondary winding for B+. pdf. 5V/17mA. I purchased Edcor, Electra Print and Hammond power and output transformers. I´m now using a circuit by Electra-print, a TDA2030 driving the grid of the 833A by a interstage transformer, im using a 230/24V transformer for this, however electra-print makes a special transformer just for this but i don´t have the 89 dollars it cost. Jan 11, 2021 · For various reasons, I am attracted to this Electra Print 6BX7 SE or PP schematic: Electra-Print. where the tweeter sees amp + in series with an 8R levelling resistor and in parallel with a 0. This set includes the M6 lamination power transformers that will run cooler than the standard transformers and, most importantly, the partial silver stranded secondary wound output transformers (PSSS) that you can again read about at the website. Berndt. The PVA effectively deals with the issues that face a passive pre-amplifier. Aug 17, 2021 · I have been using the EML mesh plate 2A3 V4 version (octal socket with a separate cathode connection) in a single ended amp for a couple of years. I am selling my spare 2A3 SET amplifier. Electra-print also designs custom amplifiers and pre-amplifiers. Sep 29, 2014 · My current pre amp for quite a few years has been an Electra Print PVA which is a passive design using a pair of nickle core transformers for isolation and voltage/current balance. I'm not here to knock Jack or Electra-Print. Jan 8, 2008 · Some of you may remember a while back I was experimenting with transformers as phase splitters. We can do that by installing a device, let's call it "R", between the amplifier and the power supply. The EL34, derided by some as the KT88’s poor cousin, is really an exceptionally musical tube and the current Russian Mullard reissue is a very good-sounding choice. Welborne Labs did use some of Electra Prints transformers, etc. It needs to be paired with an amp that has high input sensitivity. Jul 1, 2007 · My personal pre-amplifier is an Electra-Print PVA, which is a passive design that utilizes a pair of nickel core transformers. I have always achieved excellent results with this pre with a wide variety of amps. That particular transformer is available in gains from 1 to 8. Very nice amps and preamp - keeper. link to pictures below: Nov 16, 2022 · It is a shame audio transformer manufactures are going away. Image courtesy Electra Print Audio. Electraprint DRD SET Amplifier, Part 1 Article By Bill Gaw Electra-Print Audio 4113 Roxanne Drive Las Vegas, NV 89108. Therefore, I wonder if running the output tube in Ultralinear mode may help power output while allowing a lower operating voltage which maybe attainable with an off Dec 2, 2017 · The amplifier is transformer coupled using the LL2753 and the output transformers are Jack Elliano’s Electra-Print 3. Apr 19, 2021 · I'm also 99% sure the Electra-Print transformers I received saturated below 32 Hz at 10 W (spec was 25 Hz, 15 W). Type 6BX7GT was first introduced in 1952. Feb 15, 2015 · The Belles amplifier requires 1. Jack has a schematic for Oct 24, 2017 · The output transformers were wound by Jack Elliano at Electra-Print and feature a third winding for use in Jack’s Iso-Linear circuit topology that the A30 appears to emulate. 27V on the input for rated power output, and my source components are capable of 4V of output. If (when) I were to build a SE pentode I would seriously consider regulated screen grids with GNFB; a couple of OD3 are ideal for the job. He is knowledgable and the transformers are good (saturation issue aside). For more information and product specifications please click HERE. Model VT2KB One Pair (2 matched pieces) Single Ended Output Transformers about 14 lbs each ( yes, very heavy duty ) $600 per matched pair it is primary 2. Historically SE amplifiers have been limited in power, largely under 15 watts. Frankly, I really don't hear much difference between the transformers. Voice: (702) 396-4909 Fax: (702) 396-4910 May 8, 2009 · I feel its better to start a new thread since this amp isent very tubelab anymore. Read 7405 times. They are really dirt cheap and remarkably small. Electra-Print. on the electra-print site. Listening to the prototype right now- shocking bass, Electra Print Audio 300B Custom amplifier Electra Print Audio PVA preamplifier. Two of the best audio transformers ever built are Dynaco ST-70 and ST-35 audio transformers. They are actually autoformers rather than transformers. We build products to fit each customer's needs using our original designs. Bought it because of famous Electra-Print transformers, but after almost 2 years have not used it at all. These are typically their unique standard designs, however many are made to meet customer specifications. Looks like a Electra Print Audio 300B Custom amplifier Electra Print Audio PVA pre-amplifier, Hagerman Coronet II phono stage with VCAP upgrades and a Hagerman Piccolo step up. Full Member; Posts: 1412 » Gallery » Systems; Electraprint DRD SET Amplifier, Part 2 Article By Bill Gaw Electra-Print Audio 4113 Roxanne Drive Las Vegas, NV 89108. Aug 13, 2006 · An Electra Print PVA pre-amplifier was used to drive the Monarchy’s. Jun 7, 2021 · For my next project, I'm considering a High quality "300B on a budget" build and want to get some OT on the way. 4 300B DRD Parts List for Tube Rectification version (one channel shown) ____ R1 100K 1% metal film resistor (Caddock upgrade) ____ R2 100R 1% metal film resistor (Caddock upgrade) Sep 17, 2008 · Electra Fidelity has a new EL-34 amp coming out that is the best SET amp I have ever heard, no exaggeration. Broskie reckons the small transformers for flea power amps often sound a lot better than those stupid outsized mega humungous things that have now got into fashion for "high end", and has a theory about multiple taps, matching and crossovers that really is "outside the box". I eventually ordered a pair of PSA-2N phase splitters from Electra-Print. And I will also be mating it with WE300B or Emission Labs 30B. We're talking <$500 in transformers for each amplifier. Jul 9, 2021 · Then I modified that amplifier, for the seminar I gave at VSAC 2008: A comparison of 'parallel single ended' (one triode of an ECC99 driving one Electra-Print 1:1 to drive the parallel 300B tubes, and an SE output transformer with a primary of 1600 Ohms); versus a push pull amplifier that used both ECC99 triodes that had a current sink in the Nov 16, 2022 · A pair of Electra-print PVA-2n line-level transformers cost $240 back in 2021. Perfect for a 300B amplifier. . These are typically our unique standard designs. Circuit of a 4 Watt SE audio amplifier. With SS rectifiers you would multiply by 1. I swapped them into a 45 based amp that I had designed, and they were far superior to whatever I was using at that time. Do you have any idea of the current here? Jul 10, 2007 · However, with that amp, I am sparing no cost, Mundorf film caps as the Ultrapath, Electra-print choke load and power supply choke, and either Plitron or Electra Print output transformers. Voice: (702) 396-4909 Fax: (702) 396-4910 transformer can offer even better performance, so the existing amplifiers were modified. All transformers were auditioned at 60mA of The Electra-Print PVA pre-amplifier is based on a pair of custom wound nickle core transformers. Unused and half-price. My Yamaha NS10 near field speakers were used in a small listening room. Oct 25, 2020 · Electra-Print Audio Co. The example in the article used a 10K pot (I'm pretty sure) and was designed for a higher impedance load, perhaps 100K, like many tube amps. They are in very fine condition. I've built 3 Tubelab amplifiers, (TSE-II with 45 output tubes, SPP with EL-84 tubes and SSE with 6L6 output tubes). Electra Print Audio 300B Custom amplifier Electra Print Audio PVA pre-amplifier, Hagerman Coronet II phono stage with VCAP upgrades and a Hagerman Piccolo step up. The 300B is biased at 380V/-80V/75mA and the C3g at 225V/-3. That amp would eventually become the TSE. Listing ID: LIS3H4AH Classified Listed December 14, 2012 3:36pm · 1198 Views. link to pictures below: picasa album - click to open Amplifier and matching preamplifier sounds fantastic and I couldn't be happier, however. The tubes are self-biased and decoupled with Elna Cerafine. Reference: Data-sheet. All the resistors for biasing the 300B are Mills MRA-12. The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 59 mm tall. I am very pleased with the sound and they are very quiet with the cathode connection. The system was wired up with Tara Labs cables. Sep 1, 2018 · From the Electra print site, it appears to be a step up. I visited an old site that tested about 40 vintage transformers and the Dynaco were best. One can use different type of 45 for the driver such as old RCAs, old globes, EML45. The final tubes can be either any type of 45 or switchable to EML45B. 1:1 ratio. They are best used in the 60 to 80 mA range, so a transformer with a 100 mA or more MAXIMUM current is appropriate. This way, the distortion component will something to react against. The amplifiers are 300B single ended triode Apr 19, 2021 · We had the Electra-Print's out of my TSE, a pair of One Electrons (don't remember the number) and the Transcendar 300B transformers. com Push-Pull A2 6A3/300B A couple of months/years ago there was some discussion around the LME49811 and LME49830 IC's: opamps that can be fed from +100V/-100V and therefore produce about 60V RMS supplying some mA of current. About Electra-Print AudioElectra-Print makes custom output transformers for use in home high-fidelity tube audio components. 5K to 8Ohms low IMD. ndiq ldsu khasgiay dpl awtgzsiy xez bww bfqsvj zwys lgy