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Medium Size Plate Choke
30mA/70H
DCR : 425 Ohm +-5%
Freq. Resp : 20Hz -- 50KHz
suit for tubes of rp=1--2K
L 60mm W 50mm H 50mm
Screw distance : 70mm
Price : 40USD (out of stock)
Small Size Plate Choke
20mA/60H
DCR : 750 Ohm +-5%
Freq. Resp : 20Hz -- 50KHz
suit for tubes of rp=1--2K
L 50mm W 42mm H 42mm
Screw distance : 62mm
Price : 40USD (out of stock)
30W 3.5K OPT for 300B
Freq. Resp. : 0.3dB @ 30Hz -- 29KHz- , -1dB @ 20Hz -- 58KHz
Phase : 30Hz -- 50KHz within 5 degree
Price : 260 USD @ pair (out of stock)
2A3 SE OPT
Primary : 2.5K OHM , plus a 2.3K OHM
Secondary : 0-8-16 ohm
Z11 core
Freq. Resp. : 20hz - 30khz / +-0.5db @ 16 ohm /1W
Mount size : 65 mm X 65mm
Price : 150USD @ pair
10Y SE OPT
Z6 / 0.3mm core + Teflon/NOMEX insulated
EI66 * 36
10K：0-8-16 OHM
Price : 150USD @ pair
5687 SE OPT (also for 71A/6C45π)
Z6/0.3mm core + Teflon/NOMAX
EI66 * 30
Price : 130USD @ 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)
For different Headphone : 32 OHM/64 OHM/100 OHM/120 OHM/240 OHM/300 OHM/400 OHM/600 OHM
Freq. Resp. @ 0.1W : 20HZ-20KHZ / 0.5DB (test with headphone)
Plate Choke
200H / 35mA / 80USD @ pair
60H / 30mA / 70USD @ pair
Interstage
Phase split interstage 1 : 0.5+0.5 , suitable for 5842/6C45/5687/6H30 / 100USD @ pair
1+1 : 1+1 interstage , suitable for 5842/6C45/5687/6H30 / 100USD @ pair
MC step-up transformer
gain = 28 (29dB) / 200USD @ pair
All nickel iron insulated with TEFLON TAPE, larger than ordinary step-up.
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