Kt150 output transformer The MB30 is optimised for Triode as well as UL operation. Even if the power transformer and output transformers were rated to handle the current of the KT150 you would want a different plate voltage and need the bias on the tube to be adjusted to draw much more current through the tube to get the power out of the amp. With 5 meter distance the oscillation remains the same. Jun 27, 2018 · Aside from the heater current draw there are other issues. Jun 30, 2014 · Bob Latino wrote: No . That's why single ended is more commonly composed of TRIODE output tubes. What about the output transformer? You need at least a 70 watt P-P xfmr to handle the KT150 at As a “modern” design it is at the cutting edge of what is possible from high end valve amplifiers. Jul 25, 2013 · Only amps I can speak of with authority is the Dynaco lineup. The Hammond transformers in my Eiclones should be up to the job too. Mar 13, 2020 · First of all, please ensure your amp manufacturer is on board. So If I wanted to build an amp using 1 pair of KT-150's to produce 50, 75 or 100 watts which these should easily do, how does one choose a primary impedance?? Dave Sep 18, 2016 · All motor run caps in the power supply, CXSE25-5K 25 watt OPT's, 400-0-400 325Ma Power transformer, B+ = 475. You can also measure the actual plate current by shunting the output transformer with a multimeter in the DC milliamps mode and use the Tube Dissipation Using Plate Current calculator. 5 kHz. impedance of an output transformer by looking at a tube datasheet? Old tubes often have specs for various classes etc. Sep 20, 2015 · The KT150's are not going to bias properly in that circuit, would be my guess. The plate curves for these tubes are extremely linear with no feedback. The heart of a good Single Ended amplifier is the output transformer. With that disclaimer, I went from a kt120 specified ARC vsi75 to a kt150 specified ARC gsi75 some years ago. With an 8 Ohm speaker (B&W) the oscillation’s frequency rises to around 2 kHz. Superior quality parts sourced from Europe or the US. Nov 10, 2018 · Power performance is determined by type of output stage, be it class AB,A, tetrode, triode or U. 15dB only. Class A power is fast for a more lively, immediate response to your music The Bias Select switch is engineered with 3 perfect auto bias settings for KT88, KT120, KT150 and KT170 output tubes. Feb 12, 2021 · Pentodes make outstanding output tubes in PUSH PULL where the H2 distortion is cancelled in the output transformer, but poor single ended output tubes. Jun 30, 2014 · The KT150's are about $100 apiece and eight output tubes for two amps would be $800. I have two Freed power transformers rated at 540V-0V-540V and 250ma, a single power transformer from an organ with 380v-0v-380v and 250ma, and a pair of NOS power transformers from the late 60s with 300v-0v-300v and 120ma. - The speakers are NOT near the output transformers. If you like the sound of a single-ended 2A3 or 300B, then think of the 211 or 845 as sounding similar but with more micro-detail, dynamics and power. Dec 19, 2023 · The amp neither sounds like valves nor solid state. The mains transformer is from Sowter, and the output transformers were hand-wound. Our output transformers are custom wound in-house for deep and tight bass extension, an extended top without even a hint of grain, and our famous PrimaLuna midrange. 9" Output transformers are the most important part of any tube Jun 18, 2024 · Sextet of KT150 output tubes create 250 watts of Class A musical power. Upgrade to new high power iron, and you're ok as that has more than enough capacity. Thanks to 48 hours of burn-in, followed by thorough testing and careful matching of tubes, the amplifier requires little maintenance. If you damage the transformers with that misuse, I also suspect that Jadis will not warrant them. The venerable “Leak” inspired driver circuit updated to match the performance of the KT150 and our in-house designed output transformers with our unique design of Tertiary (balanced) windings. It just sounds right. L; and you have to take into consideration the power supply voltage and current capacity as well as the output transformer which in turn has a large effect on the performance requirements if bandwidth and distortion limits are factored into the Features. 2" x 8" x 15. –12 watts per channel output with the KT-150, KT-88 or KT-120 output tubes and 5AR4 rectifier tube –10 watts per channel output into 2 ohm loads with KT150 output tube with 5AR4/GZ34 rectifier –Duty cycle of the amplifier is 24/7 in full operate conditions –Harley Davidson Gloss Black powder coat finish –Weight: 14 (fourteen) pounds The new design input stage is 12AU7 direct coupling to 5687WB driver stage to 6H30 cathode follow driver stage , The driver stage uses coupling cap to KT88 power tube , The KT88 ( KT120, KT150, KT170 ) work at Class AB1 UL P-P mode to driver Hasimoto output transformer , The Hasimoto special grade CUT CORE orient high B output transformer has 300B Single Ended Output Transformers: Sophia Electric vs. For the output transformer we have endeavored new ways with a first-time groundbreaking coil technology to achieve even more sound performance, by means of which the amplifier in the lower frequency range can work significantly more stable without limiting its fresh, vivid, and holographic sound performance. This letter-sized stereo amplifier is a single-ended design with an output power of 10W per channel, but there's a lot "under the hood" (and the glass) to understand. Apr 16, 2020 · It is technically impossible to "optimize" for every tetrode and pentode from 6V6 to KT150. At the very least they draw more filament current than KT88s. The article explains the “why and how” of the unusual Dec 17, 2024 · - The oscillation frequency is somewhat depending on the output transformer’s load. Dec 21, 2016 · I have a pair of Edcor CXSE25-5K-8 Ohm Output transformers, and several power transformers that I can use. Should deliver upwards of 75 watts at the speaker terminals if the power supply and output transformer are hefty enough. The input stage is 12AU7 direct coupling to 5687WB driver stage to 6H30 cathode follow driver stage , The driver stage uses AudioCap Theta coupling cap to KT150 power tube , The KT150 work at Class AB1 UL P-P mode to driver Hasimoto output transformer , The Hasimoto HW-100-5 CUT CORE orient high B output transformer has very low Insertion Loss 0. Those who know STRONGLY discourage using the new KT120's (and by extension, the KT150's) in the stock Dynacos, citing the original transformers as borderline at best. Our specially developed Low Distortion Tertiary transformers allow the KT150 to really “sing” without constriction giving wide bandwidth and dynamics with excellent detail. Apr 3, 2016 · If you look closely at the schematic, there is 110mA current being passed by the KT150, and the output transformer is a 3kohm 30watt unit. 250 watts of power will have no top and bottom extension if the transformers don't have enough bandwidth. DWU and Richard Wugang and made by Sophia Electric in-house. Chassis’ are finished in-house which includes powder coating and electroplating to ensure quality. Jun 14, 2018 · One option is 600V plate and 290V to 300V screen with approximately a 5KΩ primary. . I am sure some transformer company could wind some transformers that could take advantage of this tube's full potential. Feb 10, 2021 · In this article, Menno van der Veen explains everything about the Vanderveen Trans-SE10 amplifier, which is available as a DIY kit manufactured by Tentlabs. The monster power transformer in the TU-8340VK is rated to supply the juice these tubes require. 99 per matched pair of Sophia Electric 91-01 300B ou. Transformers and chokes are design and handmade by Audion: Mains, chokes and output transformers. In this case a heavy duty individual power supply. there is no upgraded power transformer and/or no upgraded output transformer available from me for upgrading the M-125's to use the KT150 output tubes at the higher voltages and higher bias points needed. Remember that the KT150's need at least 600+ volts at the plate. This method is more dangerous because when your meter probe This is achieved by the use of massive, custom-built power and output transformer delivering current from sixteen KT150 vacuum tubes in each channel. Can the mains transformer (designed for the KT88 with an idle Class A current of about 85ma) handle it? Probably not. 18 Watts being ample for most situations. Even the capacitors are made to Audion’s exacting specifications. Like decooney stated above, best to call the dealer/distributor for Jadis first. They are also much more tactile and dig out the tiniest of details. It would be far more accurate to assert that any tube from 6V6 to KT150 will work without damaging the amp; but without knowing the turns ratio of the output transformer and its inductance, it is impossible to ascertain which tube type is really the optimum. Dec 17, 2024 · In my opinion, the 211 requires an output transformer in the 14~16k range to get the best sound from the 211 tube. I have combined a 400% duty cycle power transformer, larger output transformers and higher voltage regulated screen grid power supply in this new "Fire-Bottle" KT-150. You measure the output transformer's voltage drop and resistance to calculate the bias current. Apr 4, 2013 · The new TungSol KT-150 tube must have been engineered designed and manufactured for SE class A audio amplifier service. but, newer tubes like the KT-150 have very minimal specs. 550 watts (KT150) Standard Tube Complement: 6 - 12AU7 8 - EL34: Dimensions (WxHxD) 15. We use lower power to extend tube life, and bandwidth to give you slam. With a 4 Ohm speaker it’s around 1. Kegger helped tweak the layout, designed the power supply, and setup the schematic to get these big tubes to sound their best. Valves are linear devices in that they reproduce all frequencies in the same time domain. The power transformers on the all the VTA amps are "overbuilt" and can handle more current draw than the normally specified output tubes for the amp. Apr 18, 2017 · The Tung-Sol KT120 (and KT150) tubes are new designs, basically more powerful versions of KT88 and 6550 tubes. The goal of this design was to produce a zero negative feedback single-ended Class A amplifier with enough power to drive a variety of speakers. Price for 300B OPTs: Option 1: $699. Feb 12, 2022 · Is that amp cathode biased? If so, then the KT150 will draw down to 34 volts, and going to max idle current of about 140ma per tube. Audio Note Sophia Electric in-house made #91-01 and #91-03 and #91-05 output transformers were designed by Dr. The Tung-Sol KT-150 was selected for the output tube because of its 60W plate dissipation and good linearity when wired as a triode. pphiqniewvejhhkilipkeolcxxfxtxlwsmzelxcnmjcrdfxyfknpcczfrouuwvijaztzdpg