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is tango np-126 good ot for 10y tube preamp August 10, 2026 No, the Tango NP-126 is not a good output transformer for a 10Y tube preamp. While the Tango NP-126 is an legendary, ultra-premium line transformer, it is physically and electrically mismatched for a high plate resistance (\(R_{p}\)) triode like the 10Y (VT-25). [1] The primary constraints making this combination a poor choice include: 1. Inadequate Primary Inductance at Low Frequencies The Math: The 10Y features a high internal plate resistance (\(R_{p}\)) of 5kΩ to 6kΩ. To achieve a flat low-frequency response down to 20Hz, your transformer primary needs an inductive reactance (\(X_{L}\)) at least 3 to 4 times the tube's \(R_{p}\). For a 10Y, you ideally need 80 to 100 Henries of primary inductance minimum under actual operating conditions. The Tango Reality: The Tango NP-126 datasheet specifications show a primary inductance of 110H when wired in its 20kΩ series configuration. While 110H sounds like enough on paper, that figure drops drastically under actual DC current load. [1] The Penalty: As inductance plummets with your standing bias current, the 10Y will lose its load line at low frequencies. This turns into an early bass roll-off and a massive spike in phase shift and low-frequency harmonic distortion (H2/H3), robbing the 10Y of its signature clean, tight authority. 2. Excessive DC Current Constraints The Math: A 10Y sounds best and achieves maximum linearity when biased relatively hot, typically around 15mA to 25mA of standing DC current. The Tango Reality: The maximum rated DC current for the Tango NP-126 in series mode (20kΩ) is only 20mA. [1] The Penalty: Running the transformer right at its 20mA redline leaves zero headroom. The core will magnetically saturate on bass transients, compressing your dynamics and dirtying up the lower midrange. If you back the 10Y current down to 10–12mA to protect the transformer core, the 10Y moves into a highly non-linear region of its curves, spiking higher-order distortion across the entire band. 3. Core Size Limitations The Weight: The NP-126 is a small line transformer weighing only 0.8 kg (1.7 lbs). It was engineered to handle lower-impedance, lower-current, or indirectly heated triodes (like a 6SN7, 76, or 56). The Penalty: High-impedance DHTs like the 10Y demand massive, heavily gapped iron cores to maintain high inductance while carrying significant DC current. Putting a 10Y on an 0.8 kg transformer severely bottlenecks the tube's energetic micro-dynamics and holographic soundstage. [1, 2, 3, 4] What Transformers Work Better for a 10Y? If you are determined to build a 10Y preamp, you should look for large-core output transformers explicitly engineered with a 10kΩ to 15kΩ primary rating and a high 30mA+ DC current capability. Excellent historical and modern matches include: Hashimoto HL-20K-6: Designed precisely for high-\(R_{p}\) line stages with robust inductance under load. Monolith Magnetics or Lundahl (e.g., LL1689 or LL2745 in appropriate configurations): These offer amorphous or silicon-iron cores sized appropriately to handle high-plate-resistance tubes without saturating. Show all You said: what can tango np-126 be used for in a 10y preamp what can be tango np-126 used for in a 10y preamp August 10, 2026 While you cannot use the Tango NP-126 as a conventional plate-load output transformer for a 10Y, you can still utilize it within a 10Y preamplifier circuit by changing its functional role. To use it safely and effectively, you must decouple the transformer from the high internal resistance (\(R_{p}\)) of the 10Y and isolate it from carrying the tube's heavy DC standing current. Here are the three best ways to integrate the Tango NP-126 into a 10Y preamp project: 1. Parafeed (Parallel Feed) Output Transformer This is the most popular and sonically superior way to use the NP-126 in a 10Y circuit. Instead of forcing the transformer to handle both the audio signal and the DC bias current, you split the duties. How it works: You load the 10Y plate with a high-inductance plate choke (e.g., 100H–150H rated for 30mA) or a solid-state Constant Current Source (CCS / Gyrator). You then connect the Tango NP-126 in parallel via a high-quality blocking capacitor (typically 1µF to 3.3µF). Why it works: Because the DC current is blocked by the capacitor, zero DC current flows through the NP-126. This prevents core saturation. Without DC current, the primary inductance of the NP-126 rockets up to its maximum potential. The Configuration: You can now safely wire the NP-126 in its 20kΩ series primary configuration. The 10Y sees a pure, flat, high-impedance AC load. This preserves the 10Y’s deep bass authority and liquid midrange while utilizing the legendary Tango core materials for the output stage. 2. Input Step-Up / Phase Splitter Transformer If you decide to use a dedicated, large-core output transformer for the 10Y, you can move the Tango NP-126 to the very front of the preamplifier circuit. How it works: Place the NP-126 before the grid of the 10Y tube to act as an input isolation and voltage step-up transformer. The Configuration: Feed your source component (DAC, Phono stage) into the 600Ω or 5kΩ parallel connections of the NP-126, and use the 20kΩ series connection to drive the grid of the 10Y. Why it works: This provides a clean, passive voltage gain (step-up ratio) before the tube stage. It also provides perfect galvanic isolation, breaks ground loops, and can cleanly convert a single-ended (RCA) input into a balanced signal if you want to run a balanced volume control. 3. Interstage Transformer (Push-Pull or Two-Stage Design) If your 10Y preamp is a more complex, multi-stage design, the NP-126 can serve as a premium coupling device between the first stage and the 10Y stage. How it works: You use a low plate-resistance, low-current driver tube for the first stage—such as a 76, 56, 6P5, or 6SN7 section—biased safely below 10mA–15mA. The Configuration: The NP-126 sits on the plate of this small driver tube, and its secondary outputs directly drive the grid of the 10Y tube. Why it works: Small signal tubes match the primary inductance profile of the NP-126 perfectly. The NP-126 then acts as a low-distortion buffer, driving the grid capacitance of the 10Y effortlessly while imparting the classic Tango sonic signature into the signal path. Summary of Implementation Roles Role Placement Primary Wiring Core Benefit Parafeed Output After 10Y Plate (Capacitor Coupled) 20kΩ Series Keeps DC off the Tango; maximizes bass extension. Input Step-Up Before 10Y Grid 600Ω or 5kΩ Input Provides passive gain, breaks ground loops. Interstage Driver Between Driver Tube and 10Y Match to driver tube Drivers 10Y grid cleanly using a small driver tube. You said: mark levinson 27.5 , im using tango np-126 ot mark levinson 27.5 , im using tango np-126 ot 01:51 Given that you are driving the Mark Levinson 27.5 with its high 1.5nF input capacitance, using the Tango NP-126 in a Parafeed configuration is the only way to make a 10Y tube preamp work successfully in this system. By separating the DC current from the audio signal, you allow the Tango to maintain its maximum inductance, lowering output impedance enough to handle the Levinson's challenging input load. The Optimized 10Y Parafeed Design Blueprint To implement this safely and extract the absolute best sonic performance, your circuit must use the following configuration parameters: [10Y Plate] ───┬───────────────────┐ │ │ [Plate Choke / CCS] [Parafeed Cap: 2.2µF] │ │ (B+ Supply) [Tango NP-126 Primary] (20kΩ Series) │ (Ground) 1. The Plate Load (Choke or Solid-State CCS) The Component: You must load the 10Y plate with a dedicated, high-inductance Plate Choke (minimum 100H to 150H rated for 30mA DC) or a high-voltage Solid-State Constant Current Source (CCS / Gyrator). The Reason: This component handles 100% of the 10Y's standing DC bias current (ideally set around 15mA to 20mA for maximum linearity). It acts as a massive AC block, forcing all the musical signal to flow through the parafeed capacitor instead. 2. The Parafeed Blocking Capacitor The Component: A premium 1.5µF to 2.2µF film capacitor (such as a metalized polypropylene or oil-filled capacitor) rated for at least 450V–600V. The Reason: This capacitor blocks the high DC voltage (B+) from reaching your Tango NP-126, protecting the transformer while passing the AC audio signal perfectly. 3. The Tango NP-126 Wiring Configuration Primary Side: Wire the primaries in Series (20kΩ configuration). Because there is zero DC current saturation, the transformer will deliver its maximum specified 110H of inductance. This creates an ideal, ultra-linear load line for the 10Y, eliminating the low-frequency H2/H3 bass distortion that would normally ruin a direct-dc design. Secondary Side (Output): Wire the secondaries in Parallel (600Ω configuration). This yields a massive 5.7:1 step-down ratio. Driving the Levinson: Stepping down the 20kΩ primary to a 600Ω secondary drops the output impedance (\(Z_{out}\)) of your preamplifier down to roughly 150Ω to 200Ω. An output impedance this low will effortlessly drive the Mark Levinson 27.5's heavy 1.5nF input capacitance without rolling off the top end or causing high-frequency phase shift. Expected Sonic Outcome Implementing a 10Y in parafeed into the Tango NP-126 brings out the absolute best traits of both pieces of hardware: The Bass: Tight, punchy, and deeply extended. The Levinson's solid-state grip is preserved because the preamp's low-end phase behavior is perfectly flat. The Midrange: You retain the legendary, pure H2 dominance of the 10Y, throwing a vast, holographically layered soundstage with lifelike vocal textures. The Treble: Sweet, highly extended, and free of glare, because the low output impedance cleanly slices right through the amplifier's input capacitance. [1]

Nesko je Bog za kompjutore i elektrotehniku,genetski uskracen za kose oci i ostale stereotipe Na shemi je byp.kond 220uF a u realnosti/mashini je 100uF PanaasonicFM promenismo 10uF navodno Ultrapath kond Solen za 22uF Mundorf EVOil i ja hteo skinem byp.kond jer nekim citanjem i C-GPTovanjem sam vidiJO da ak se skine b.kond onda UltraPath treba da bude 47-100uF. Naravno Neskor se nebi zvao Neskor da njegova nije zadnja pa nismo skinuli kond i Ultrapath trenutno ostavili na 22uF za sta literatura i data centri nemaju odgovor jer ne poznaju dobro Neskicja... Sve je krenulo od ideje da se skocka sta se moze,npr stavi AVC umesto Alps-a sto je najbolja stvar koju je moj sistem ikad video, pa hteli Collemana al nema mesta, znaci ostali su neki kondovi,otpori i zicice, uglavnom oko katode ALI: ...AJ SAD POMOC SVIH SLAVUJA (Pitao ja i citao al problem je sto ne znam kako je preamp shvajsovan te nebi da komentarisem, znam samo da sta god koleza Neshky stavi/rastavi to uvek svira i bas svira al nema razloga ne igrati se kad je "kraj" na vidiku ELEM ovaj Tango NP-126 sto je OT ,I guess, po data centru iz nekog sela u Americi, nije optimalan izbor za 10Y balun , cak sta vise iako je ledjendaran, izgleda da ovaj bas ko meni za baxuz ispushta dushu kad vidi DHT ,prejede se pa se zasiti plus strujdza mu je max 20mA sto je ujedno srednja radna tacka lampe tako da nema prostora za disanje kolko skontah, i sve ovo uzeti sa rezervom jer samo citiram ono sto jos ne razumem skroz al trudim se da naucim,Nesko ce razumeti da pokusavam da naucim sta novo...problem je sto zna gde zivim...pa ako se nesto desi molim vas prosledite ovaj post mom advokatu. Lampe su bas zabavne btw. Onda pitah par pitanja sta raditi u mom slucaju ili kako rekonfigurisati sve to i dobio sam sledece odgovore, pored toga da probam kako se 9mm projektil slaze sa mojim centrom za ucenje... pitanja i odgovori su u sledecem postu:

Odradjena prepravka, ovo oko pina 10 nisam ukacio kako tacno treba, ostalo je kao na shemi da ide prvo na otpornik pa na kondenzator, 470uf plus na masu spojen. Ovako u vezi zvuka nesto mi se cini da je izgubio malo crisp u odnosu na kako je bilo, muljavije je malo a i zericu tise. Mozda je uzrok ovo za 4u7 kod mene na ploci pa da prepakujem da ide prvo na kondenzator a onda otpornik Na poziciji c92 je 47uf, na riz shemi 10u

Fabricki su dosta veci al kod riza je sve moralo biti betonsko, odo vaditi uz krseva starih pa javljam dalje

moze, sve je to strujica boranija

Mogu li se iskorititi ovi mali otpornici, 680r bi mogao izvaditi iz preampa ali ostalih kojih nema ili ti sitni ili da porucujem Ne da meni djavo mira da cekam do utorka a nemam mnogo otpora kupljeno

uradi ulaz (pin 10) kako je ova slika iz datasheet , ostavi 330p u paralelu sa 100K; redni kond moze da bude i veci od 2u2 ostavi te 220n kondove kako jesu mozes da ubacis 33R izmedju pina 3 i pina 1, dodaj 470u/25V od pina 1 na masu na pinu 7 povecaj kond na 47u do 100u, ako hoces da povecas gain, smanji otpor sa sadasnjih 1K5 na 680R i sve ce bolje sviri

VEGGE LOWLANDS

Eto par fotki, reci ako jos sta treba. Na slici bez hladnjaka zaokruzeni konektor je raksacen a njegovo mjesto zauzeo je direktan sa wipera pota, koji je iskopcan iz so called preampa, ostalo je sve kako je bilo, na izlazu sem 10uf nije nista modifikovano, sve kako je bilo Reed releji spremni, brega nema al ima akron mandjetna

daj mi proper fotku kako sad izgleda izlaz postujem ti veceras semu sta da uradis exactly spremi talijansku bregastu i dva reed releja

Maznem taj dizajn sa fotke. Stvarno ne znam, tolko se slabo kontam u to da je to katastrofa, do sad sve bilo prikrpi ili osvjezi postojece a ovakve prepravke su mi totalna nepoznanica. Jedino mozda da se stave R90 i R91 otpornici veci, sinoc sam mozgao ali ne znam koji bi najbolje legli jer mi se cini da je sve krs po sebi pa da ne pogorsa jos

ajd sad - gledajuci drugi datasheet - sta bi ti uradio od prepravke da dobijes i vise gaina i bolji zvuk?

Evo ga, to je sto sam nasao. Lako se zajebati pa naci 412 020 il neki drugi. Sada je zvuk laicki receno puniji i bass je punchier ali mu fali glasnoce a da ne ode u distorziju. Jasnije se cuju svi tonovi stk020 (1).pdf STK020 (2).pdf

to nije preamp nego crna rupa nadji datasheet od STK i postuj ovde ili link do sa danasnjim izvorima, ne postoji prakticno potreba za preamp gain stage, ako iomas potencijala u izlazu za gain

Montirani novi chipsovi, ucentriran i visoktononac na jednoj kutiji, i C92 u izlazu stavljeni 10uf kako shema kazuje, fabricki bio 4u7. Grmi ovo fino kad je full volume, ali jedva da malo vu ode u crveno, sa gramofona nisam ni isporbao ali racunam da ce biti tiho. Jel postoji sansa da los preamp muci stk u izlazu, jer bi da pokusam jos jednom sa preampom a da ne razjebem chipove, pa da onda idemo u projekat za pojacavanje gaina

Po mom misljenju najbolje je ici sa klizaca 100K/log ulaznog volume pota dalje kvalitetnim blokcem na resetku lampe , a resetku lampe uzemljiti otpornikom od 470K-1M u zavisnosti od maksimalne dozvoljene vrednosti resetkinog otpora . ps, sve ovo je iz razloga da ako eventualno neki izvor signala ima slucajnu nezeljenu DC komponentu onda ona nikako ne moze doci do resetke i tako poremeti radnu tacku lampe .

Obavezno, ne košta ništa, pretpostavljam i da ne utiče nešto na zvuk, barem ne bi trebalo.

u pricipu nije neophodno ali moze da se stavi da se mirnije spava

Davno sam ovo pravio, već sam i zaboravio na to. Kao polazna tačka je bio stari headamp u ovoj istoj kutiji sa trafoom i napajanjem koji je vlasnik želeo da unapredi, te sam to i učinio. Usput je dodat i pasivni filter (korekcija) za AKG K371 slušalice, koji se može po želji uključiti ili isključiti, DC zaštita slušalica te jedan Line izlaz da služi i kao preamp. Zanimljivo je da Superlux HD681 malo bolje zvuče sa ovim filterom za AKG, slučajnost neka verovatno.

skupo im.

Zašto nikad ne stave 470k -1M od tačke 2 potenciometra (ulaz, grid) do GND pitam se?

decko voli da se igra, pa to ti je ovo je okvirna shema preampa ne znam da li je ultrapath kond sada u funkciji, nakon sto je stavljen 100uF bypass kond u katodi

hahahahahah to je to

ene, ako mogu ja, moze i jedna od najboljih vrancuskih butiga ........ https://6moons.com/audioreviews/audiomat/opera.html