Teflon zica AWG 22 za ozicenja pojacala

[Zen Mod]

30 minutes ago, SHAVIJA said:

aj samo reci sa ti lepse Parafeed ili Ultrapath?

pa nije bas da su stvari za poredjenje

parafeed je vrsta aranzmana loadinga izlazne cevi i translacije zvucnika kao loadinga za anodu, a parafeed je aranzman decouplinga, efektivan nacin izbegavanja degeneracije izlazne triode.... i jos par efekata

[SHAVIJA]

2x si napiso parafeed...msm ako si npr dosao do pola i sad bi da odlucis sta bi implementiro ...sta bi. Ako mi OT radi na granici zasicenja, dobar al mali...akmo bi ga prearanzirao u serijsku vezu dobio bi pozeljan nacin rada s tim OT(parafeed), koji je sada vezan ko Ulltrapath, tj sa novim vrdnostima kondova ko zna sta je ali je u originalu UPath. Drugo resenje je smanjiti struju na 12-15mA sto je kontraproduktivno...i greota za VT-25 (cuj mene pricam ko da znam o cemu pricam...jos sam veci baron od Barona J Trampa no sto sam bio)
Suma sumarum je tako blizu a tako daleko...osecam ga tu je, samo dal da presecem crvenu ili zelenu zicu...

[Zen Mod]

1 hour ago, Zen Mod said:

parafeed je vrsta aranzmana loadinga izlazne cevi i translacije zvucnika kao loadinga za anodu, a parafeed   Ultrapath je aranzman decouplinga, efektivan nacin izbegavanja degeneracije izlazne triode.... i jos par efekata

 

ispravljeno

[Zen Mod]

1 hour ago, SHAVIJA said:

samo dal da presecem crvenu ili zelenu zicu...

 

a plava je garant

ene, ako je OPT u rezimu da ne moze vise da dise, onda nema druge do parafeed

al to onda znaci dooobar choke i dooobar vezni kond

eto gde moz da uturis Ducati ili Icar motor run, a da isti obrise pod sa kojejakvim boutique kerefekama

[SHAVIJA]

jOS UVEK TURATE TE MOTOR RUNOVE U POJACALA? PA NE MERE BUDE BOLJI OD mUNDORF tUBE ,kAISEI AN, sILMICA mUSE gOLDENtUNE n.FKZ ITD A JOS SU POVELIKI I IMA ARC-UJU DO eTERNIJE I NAZAD

[Zen Mod]

46 minutes ago, SHAVIJA said:

jOS UVEK TURATE TE MOTOR RUNOVE U POJACALA?

ima se, moze se

 

[Zen Mod]

ene, ako mogu ja, moze i jedna od najboljih vrancuskih butiga ........

 

https://6moons.com/audioreviews/audiomat/opera.html

 

[neskor]

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

 

Izmenjeno pre 14 časa od neskor

[NIXIE]

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

Izmenjeno pre 13 časa od NIXIE

[драган]

skupo im.

[neskor]

1 hour ago, NIXIE said:

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

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

[NIXIE]

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

[BANAT]

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 .

Izmenjeno pre 11 časa od BANAT

[SHAVIJA]

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: 
 

Izmenjeno pre 29 minuta od SHAVIJA

[SHAVIJA]

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]

---