VTP12923-1440 - Mullard 5-20 PP UL Output Transformer EL34 28 Watt 3300 ohms/valve

Links


  • Order Code: VTP12923-1440.
  • Issue: 10.
  • Page Updated: 14 Aug 2019.
  • Change Request: X50599.
  • Release Note: Y11640.
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Specification

  • Valve Type: EL34.
  • Primary Circuit Name: DSC19081-ps-univ-pri.
  • Primary Circuit Type: a.
  • Secondary Circuit Name: DSC19081-ps-univ-sec.
  • Secondary Circuit Type: p3815.
  • Valve Res.Load Anode (ohms): 3300.
  • Power Output (Watts): 20.
  • Primary Inductance (Henries): 10.
  • Construction: Interleaved Grain Oriented Core.
  • Winding: Multiple Interleaved Sections.
  • Treatment: Vacuum Varnish Impregnated.
  • Application: Ultra Linear Push Pull Valve Power Output.
  • Range: Standard.

Mounting Arrangement

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Mechanical Dimensions

  • Size (SZ) = Patt78x1/1/4 FS.
  • Width (W) = 3 1/8 inch(79mm).
  • Depth (D) = 3 3/8 inch(86mm).
  • Height (H) = 3 7/8 inch(98mm).
  • Fix Centres (FWxFD) = 2 1/2 inch x 2 inch(64mm x 51mm).
  • Fix Size (FZ) = 3/16 inch(M4).
  • Weight (WT) = 4lb 3oz(1.9KG).

Circuit

Picture:dpe13157.gif Picture:dpe12582.gif Picture:dpe12586.gif

Connections

Function Connection
Anode A Brown wire
Ultra Linear (Grid) 43% A Red wire
Ultra Linear (Grid) 20% A Orange wire
Centre Tap (Ht) Yellow wire
Ultra Linear (Grid) 20% B Green wire
Ultra Linear (Grid) 43% B Blue wire
Anode B Mauve wire
Output common Black wire
Output 3 to 4 ohms Grey wire
Output 7 to 8 ohms White wire
Output 15 to 16 ohms Pink wire

Connection Layout

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Below


Application Notes


  • Safety note: Warning. This part may be connected to high voltage. Disconnect then discharge for 5 minutes before working on circuit.
  • See also Links on Left of this page.

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