Tentlabs
Mini Electronic Choke MEC



MEC-50, MEC-100 and MEC-200 come as potted and tested modules. They are intended to either upgrade existing tube amplifiers, or build new. They are not suited as choke input filter nor as active anode load, as they do not store energy.





Tentlabs MEC-50

€ 27.27
ex.VAT
€ 33.00
incl.VAT
each







Tentlabs MEC-100



€ 31.82
ex.VAT
€ 38.50
incl.VAT
each







Tentlabs MEC-200



€ 36.36
ex.VAT
€ 44.00
incl.VAT
each








Tentlabs Mini Electronic Choke (MEC)


Designers Menno Vanderveen and Guido Tent decided for these designs after the positive reception of the E-choke in 2009. MECs typically fill the gap towards medium power amplifiers (200mA) and preamplifiers (50mA) where the E-choke is still to big.

MECs can replace traditional chokes. Traditional chokes can have some serious disadvantages:
• high weight
• relatively big size
• magnetic field radiation that induces hum in the circuit

The MECs effectively solve all these issues, and offers up to 60dB supply ripple reduction


Technical description & manual
See the background article by Menno Vanderveen:
• E-choke design (English)

manual
MEC-50 & MEC-100 (pdf-file, NL )
MEC-50 & MEC-100 (pdf-file, UK)


Specifications


Mechanical
Module size: 26*15*15 mm (W*L*H)
Hole pitch: 14 mm (symmetrical). All pin diameters 1.0 mm, pin length 9 mm
Mass: 12 gram

Electrical MEC-50
• maximum DC output current 50 mA
• maximum input Vdc 800 V
• internal current limit 68 mA
• equivalent inductance 78 H
• maximum voltage drop @ Imax 12 V
• short circuit protection: No
• protected for reverse connection: Yes
• maximum heat production 0,6 W
• minimum capacity C1 27 uF
• optimal capacity C1 = C2 47 uF

Electrical MEC-100
• maximum DC output current 100 mA
• maximum input Vdc 800 V
• internal current limit: no
• equivalent inductance 10 H
• maximum voltage drop @ Imax 9 V
• short circuit protection: No
• protected for reverse connection: Yes
• maximum heat production 0,9 W
• minimum capacity C1 47 uF
• optimal capacity C1 = C2 100 uF

Electrical MEC-200
• maximum DC output current 200 mA
• maximum input Vdc 800 V
• internal current limit: no
• equivalent inductance 10 H
• maximum voltage drop @ Imax 10 V
• short circuit protection: No
• protected for reverse connection: Yes
• maximum heat production 2,0 W
• minimum capacity C1 100 uF
• optimal capacity C1 = C220 uF