Our relationship with Mike LeFevre and his highest quality transformers goes back 11years. These hand built jewels are second to none in the industry, though many other winders are now trying to catch up by offering types that Mike came out with first, like parafeed output and interstage transformers, plate loading chokes and and nickel grid load chokes. Try as they may to keep up, Mikey stays a step ahead. Nowhere but at MQ will you find innovations like cobalt laminations and C-core autoformers for headphones. 

Please Note: As of 2007 MQ and Bottlehead have decided to refer customers directly to MagneQuest for ordering of these items. This saves time and allows you direct communication with the manufacturer. You can contact MagneQuest here, or call 215-288-4816.

Parallel Feed Output Transformers

For SE 2A3, 6A3, 6B4

EXO-36
2.5K:8 ohms, 3 watts max
permalloy core, solid brass channel frame.
As used in the Paraglow 2A3 amp.
Price $300 the pair


EXO-35
2.5K:16 ohms version of above
Price $300 the pair



For SE 45, 71A, 417A/5842, 6CK4, 6DN7, 6C45pi

EXO-45
5K:8 ohms, 2 watts max
permalloy core, solid brass channel frame
Price $300 the pair


EXO-46
5K:16 ohms version of above
Price $300 the pair



For SE 300B and variants ( VV32, VV 52, VA5300, etc):

TFA-2004
3K:16,8 and 4 ohm taps, 15 watts max
black end bells, M4 core
Price $300 the pair


TFA-2004
Permalloy core, 12 watts max
black bell ends
As used in the Parabee 300B circuit.
Price $600 the pair



For 845, SV811, 50 ( 5K primary is often used in Japan with 300B as well)

EXO-50
5K:16,8 or 4 ohms, 20 watts max
Permalloy Core 
black bell ends -
One of the finest sounding MQ transformers. As used in the Parable, Doc's own parafeed SV-8113A amp.
Price $700 the pair

Parallel Feed Line Stage Transformers

For 26,27, 56,76,6J5, 6SN7,5965,5670,12AV7, 6N1P
B7
15K:500 ohms CT
5:1 step down ratio, 17VACrms maximum signal input.
permalloy core, brass channel frame
Price $198 the pair

For 417A/5842, 437A/3A-167M, 5687, 7119, 71A, 6C45pi
B7
5K: 500 ohms CT, 3:1 step down ratio, ratings and materials as above
Price $198 the pair
Either can be used in one of two variations of the Soul Sister preamp found on the VALVE back issue CD ROM

Parallel Feed Interstage Transformers

RIT-5 "junior"
5K:5K, 1:1 ratio, parafeed only
M4 Lams
solid brass channel frame
similar to the EXO-35/36 in size

Great with 417A/5842, 6C45pi, or 5687/7119 as driver.

Handles 60V rms maximum input signal, note that this is a *20Hz* rating, not 30Hz like some others use. This will give you a maximum output swing of 85V peak, so this can drive grids of 2A3s, 45s, 300Bs, 50s, etc, anything running with a cathode bias of 85V or less. This unit is specifically optimized for cathode biased tubes. Bandwidth is super flat beyond 100kHz. You want low DCR? How about 55 ohms primary DCR? For comparison, the highly touted NC-20 is over 400 ohms primary DCR.

Price $149 the pair 

Grid Loading Choke

BCP-16NI GC
Permalloy 
Used in Doc's Parable amp
How about a grid choke instead of a grid resistor? The low DCR helps fight noise pickup and the high impedance increases the sense of dynamic punch. An incredible 4800 Henries of inductance!
Price $150 the pair

BCP-16M6 GC
M6 
Here's an M6 version of the BCP-16. 1000 Henries of inductance for plenty of dynamic jump factor, and they're so cute and teeny you can fit 'em in just about anywhere. 
Price $99 the pair

Parallel Feed Plate Loading Chokes

EXO-01

Great for 5687/7119, 6H30pi, 6c45pi, 437A, 417A/5842
20 mA, 100H, 985 ohms DCR
brass channel frame
Price $110 the pair


BCP-15
50mA, 40H, 550 ohms DCR
channel frame

Price $100 the pair


EXO-03
60 mA, 30H, 344 ohms DCR
brass channel frame
As used in Paraglow and Parabee
Price $150 the pair

B.A.C. 100
100mA, 48H
black bell ends
mounting dims. 3"W X 2-13/16"D
actual dims 3-3/4" W X 3-7/8" D X 4-1/2" H
Price $300 the pair

Air-Gapped SE Output Transformers


TFA-204
3K
16,8,4 ohms, 8 watts, 60 mA

The MagneQuest/Peerless TFA-204 is a conventional airgapped single ended output transformer with a 3K ohm primary and 4,8 and 16 ohm secondaries, rated for 60mA maximum primary DC and 8 watts power handling. Originally designed by Peerless as a replacement for the famous Western Electric A171A transformer used in the WE91 300B amp, the TFA-204 is a great match for SE 2A3 (used in our Afterglow 2A3 kit) and lower power (8 watts or less) 300B applications, as well the best way to modify the ParaS.E.X. to a conventional single-ended topology. The Paramour, Afterglow and B-Glow chassis all have mounting holes that make installation of the TFA-204 a 20 minute procedure. The MagneQuest TFA-204 uses modern insulating materials which take the sweet sonics even beyond those of the original. It would be very difficult to find a transformer with a sweeter midrange. The magnetic design is virtually identical to the larger DS-025 and RS-330 models. Don’t let the competitive pricing of these beauties let you think they are "entry level" or "experimenter grade" transformers. These transformers are made with the best materials and lovingly stacked by hand by the premier transformer manufacturer in the universe, Mike LaFevre.
Mounting centers, 1-3/4" x 2-3/8"
Price $250 the pair


DS-025
2.5K
16,8,4 ohms, 25 watts, 60 mA
2A3, Drop in upgrade to the AES SE-1
(See DS-025 at MagneQuest Online)
Price $360 the pair


DS- 050
5K
16,8,4 ohms, 20 watts, 40 mA
For 45, 50
Price $360 the pair


FS-030
3K
16,8,4 ohms, 40 watts, 60 mA
For 300B. The king of air gapped 300B output transformers.
(see FS-030 at MagneQuest Online)
Price $720 the pair

Peerless Output Transformers

The legend  lives on in Peerless, a no compromise design with the highest regard for materials, quality, and craftsmanship. Mike LaFevre takes the original blueprints and design sheets from Peerless, and crafts these inductors just as they were in the Heyday of transformer design. These are the only transformers fit to carry the legendary Peerless name.

Peerless 20-20 Plus series S-271-A
configure as 5000CT:16,8,4,1 ohms, 200 mA, 80 watts
or 1250CT:16,8,4,1, ohms, 400mA, 80 watts
Price $1200 the pair

Peerless 20-20 Plus series S-275-A
configure as 4000CT: 16,8,4,2
or 8000: 32,.16,8,4
or 12,000:48,24,12,6 ohms
120 mA, 80 watts
Price $1200 the pair

ORDER INFO


To order any of these MagneQuest products, or if you have any questions, contact MagneQuest

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