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OPT, IPT, MC Step & Transformer Volume Control (AVC)

July 2, 2012

10K SE OPT (for 10Y)
Z6 / 0.3mm core + Teflon/NOMEX insulated
EI66 * 36 
10K : 0-8-16 OHM
Freq. Resp. :  20hz -20khz within -0.5db and 20khz@-0.3db

Price : 180USD @ pair



1.35K SE OPT (for 6AS7/6080)

Primary : 1.35k ohm and 1k ohm 

Secondary : 0 – 4 - 8 ohm

6080 suggesting operating point :  
Plate-cathode voltage : 150v/160v
Plate current : 100/90 mA

Z11 iron , EI-66X36 

Dimension : L 68mm, W 68mm , H 58mm

Mounting hole distance: : 81mm

FREQ. RESP. : 20HZ - 20KHZ  within  -0.5DB   @8ohm/1w 

Price : 110USD @ pair




5687 SE OPT (also for 71A/6C45) 
Z6/0.3mm core + Teflon/NOMAX
EI66 * 30
Price : 150USD @ pair 

There are 2 types of OPT: 
   5K/120HZ : 0-8-16 OHM 
   Freq. Resp. 8 OHM and 16OHM @ 0.5W : 20HZ-20KHZ / 0.5DB

   5K/120HZ ; 0-8 / 0- 120 headphone(120 ohm) 

   Freq. Resp. @ 0.1W : 20HZ-20KHZ / 0.5DB (test with headphone)
   For different Headphone : 32 OHM/64 OHM/100 OHM/120 OHM/240 OHM/300 OHM/400 OHM/600 OHM 


TRANSISTOR SE OPT

  Excellent for Nelson Pass Arch-Nemesis
  And also works as poweramp-headphone impedence transformer
  48
8  ohm
  Primary(48ohm side) current 1.2A-1.3A  max
   Freq. Resp. 
   20HZ / -0.5db 100KHZ / -3db
   EI66*36 Z11 core

  Price : 120USD @ pair 
 


Plate Choke
200H / 35mA / 80USD @ pair
60H / 30mA / 70USD @ pair


Grid Choke (AFC)

All Permalloy (80% nickel) insulated with TEFLON TAPE

Dimension : L 37mm , W 37mm , H 33mm 

DCR : 800 ohm

Inductance : 1200H/120HZ (5000H/20HZ)

Price : 80USD@ pair
 



Interstage
Phase split interstage  1 : 0.5+0.5 , suitable for 5842/6C45/5687/6H30  / 120USD @ pair
1+1 : 1+1 interstage , suitable for 5842/6C45/5687/6H30  / 120USD @ pair



MC step-up transformer (Permalloy)
gain = 28 (29dB) / 230USD @ pair 
All Permalloy (80% nickel) insulated with TEFLON TAPE,  larger than ordinary step-up.
Dimension : L50mW42mm H43mm ; Space between mounting hole : 59mm
 


Autoformer Volume control , Magnetic Volume control , Transformer Volume Control
(Permalloy)


All Permalloy (80% nickel) insulated with TEFLON TAPE

 24 steps,25 pin out

 Impedence :  100K OHM , A TYPE VR,

250USD @ pair 

 

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