MagneQuest Brooklyn Push-Pull Series

Limited Edition Peerless TFA-2004 Mexico with Nickel Pinstripes

3K parafeed single ended primary. 4, 8, and 16 ohm secondaries. MOL of >8 watts @ 30hz. All teflon insulation on the inside. All silver bearing solder connections. Color coded mil spec teflon lead wires. Elevated solid brass bell ends (other choices of bell ends available). All brass hardware. Triple high gloss clear coat polyurethane finish.

Three pairs available. Each is different. Have M6/Ni pinstripe, M4/Ni pinstripe

and the third pair is especially unique and was very difficult to build. This third pair uses four different laminations-- hence quad mu--- M6, M4, M3 and nickel. The higher perm materials are stacked toward the middle and are mirror imaged in pairs.

These are available for sale... and in time to slide right under your Christmas tree.

Prices starting at $400 a pair. Please send inquiries to acrosound@aol.com.

R-162.5 hookup

R-162.5 hookup


#1 primary start
#2 primary finish

#3 275 volts
#4 center tap
#5 275 volts
hv winding current capacity is 40 madc

6-7-8 is 6.3 vct at 2 Arms

9-10 is 2.5 volts at 4  Arms

SH is electrostatic shield

SPECIAL SUMMER SALE

All of the items listed below are finished products, ready to ship.

Pricing is "per pair"

Quantities are limited to what is on hand.

Preamp (small signal) outputs;

B7-5K M4 steel channels $120 (one pair)

B7-5K NI steel channels $150 (two pairs)

B7-15K M4 steel channels $120 (one pair)

Input trans (isolate source from load, used in Ingot passive pre)

B7-10k:10k NI special high end Mexico model Hi/Low NI stack brass
channels.This is the highest build quality/specification that we have
done to date on these inputs. $400 (two pairs)

Grid chokes;

BCP-16 GC high nickel in steel channel frames $160 (three pairs)

Plate chokes

BCP-14 10ma/100H brass channels $120 (two pairs)

BCP-15 40ma/50H steel channel frames $125 (one pair)

EXO-001 20ma/100H $150 steel channels $150 (two pairs)

Parafeed outputs;

EXO-35 NI 2500:16 ohms 3 watts brass channels $200 (one pair)

EXO-45 M3 5000:8 ohms 3 watts brass channels $200 (one pair)

Email me with your reservations at acrosound@aol.com

Shipping extra. Will endeavor to ship your goodies within two or three business days after receipt of your order and payment.

PayPal (domestic) ok. International please inquire.

MSL

DS-050s

A pair of DS-050 outputs in-process with mirror imaged air gap locations

Super Rare Wavelength AUDIO SOLE 845 /300B 25w tube amplifiers

 

Seen for sale on eBay

 

Here is an incredible pair of wavelength audio 25w 845/300B amplifiers with insanely huge custom wound transformers by Magnequest (peerless) in excellent condition.
These amps are Important not only because they were the esteemed Gordon's Rankins first SET amplifiers but also the first sold at Don Garbers now famous FI on watt st. In NYC. As far as I know Gordon only produced one pair of these as they were incredibly expensive to make. The amps originally sold for around 20k at FI in the early 90s and in my talk with Gordon he estimated they would be worth and sell for well over 30k new in 2015. These have silver kimber Kable throughout and all parts are of the absolute highest quality. Tubes are 845, Dual 5R4 rectifiers per chassis, 300B driver and 6SL7 input tube. These are not only a piece of history they are probably the greatest 845 amps ever made. The amps weigh around 75lbs each because of the absolutely massive Magnequest transformers local pick up or deliver within 150 miles is preferred but I will also ship fully insured. I have these for sale in other places so they may be taken down at any time.

Brooklyn B-18s

Brooklyn B-18 output transformers in four different finishes.

CP 04-006s

CP 04-006+ in process. 10 madc at 175 H VLC (very low capacitance) twin coil construction mirror imaged noise canceling nom dcr of 425 ohms

CP 04-006 In process two units in brass channels

MQ Dowdy Choke

NOS Valves' VRD Amplifier with MagneQuest iron!

Craig Ostby at NOS Valves dropped us a line to let us know he used some of our transformers in a VRD Amplifier he built for a customer and they were over the moon with the quality sound!

Craig himself said, "The HF response was so much better I could cut the feedback smoothing cap value in half without any nastiness with square wave performance. This is saying allot since the stock transformer is no slouch! More importantly to my ears this was a really nice improvement across the board."

After a couple days of listening, his customer had the following to say to Craig, who kindly shared with us! "The amps are like a religious experience man. Clear, clean, and flowing music. From top to bottom, sound is more even handed, more dimensional, and just plain sounds good. The stock transformers were somewhat rougher sounding and a bit tipped up or hot in the presence regions. I didn't really notice that until I heard these! Such important musical improvements these make. I am hearing the most realistic displays of depth I have ever heard out of 2 speakers. Absolutely fantastic. You done good, no doubt about it. Tell Mr. MagneQuest his transformers are fukin musical instruments."

Check out his setup:

BCP-15 + plate chokes.

These are a special version of our standard BCP-15's. 

Same electrical specs. It's a plate choke optimized for the 45 tube. Standardly airgapped for 40 mils of plate current. It has 50 henries of inductance and 525 (nominal) ohms of winding resistance. 

An alternate airgap can be used which yields 40 henries at 50 mils of plate current. This arrangement can be used with 2A3 tube operating at 300 volts on the plate, -45 grid volts, and 50 mils of plate current.

What makes these special is that the plus model depicted in the photo incorporates key elements of our new proprietary inductor designs as highlighted in a post earlier this month.

It has mirror-imaged twin coils in a series-aiding noise cancelling (humbucking) arrangement. It is stacked with premium M3 laminations (.009" thick) which have exceptionally low core losses. Comes in solid brass channel frames. All solder connections are made with a silver bearing alloy.

Available in limited quantities for a limited period of time. These are the best BCP-15's hat I have made. 

$250 a pair plus shipping. Email me at acrosound@aol.com to order.

Introduction of a UHP series of inductors/transformers

Hello Folks,

I'm really happy to announce a premium series of mirror-imaged twin coil, noise cancelling, and symmetric low capacitance designs. These will be available as an option in many of our plate chokes, grid chokes, input transformers, etc.

These ultra high performance designs have been carefully engineered and evaluated over a lengthy development time-frame. We have gained enough experience in building these to be able to offer them as enhancements to our already heralded audio inductors and transformers. These are much more labor intensive to build and hence the pricing will reflect the increased costs.

These UHP designs are strictly proprietary, and are exclusive to MagneQuest. I will not provide in-depth technical treatises on our proprietary developments. Where possible I will endeavor to spell out what the performance advantages are in specific applications.

Many of the major concepts incorporated into this new series have been demonstrated in prior OEM work that we've done for Wavelength Audio as well as some of the craft techniques developed for use in our very special Mexico series B7 input transformers. We recently built some OEM power supply filter chokes for Serious Audio (to their electrical specs) that embody several of the key concepts described above.

Our first offerings will be for our B7 10K:10k input transformers. All electrical specs such as impedances and power levels remain as previously published.

We have some top shelf Penny & Giles RF-15 potentiometers avaiable for purchasers of our input transformer listed above.

Next up will be some of our plate chokes\grid chokes.

MSL

A New Attenuator

there's a new attenuator available. Read DHTRob's impressions below.

the unit reviewed was a 100K ohms... and I actually have some inductor loading options for this high value...

but in all likelihood Amtrans can probably make a 10K version in which case you can use our B7 10K:10K input trans with the 10K attenuator across the secondary.

Also... here's a sneak preview... I will soon be announcing a new series of "mirror-imaged, twin coil, hum-bucking, and symmetric low C" designs.... which will be available as an option in many of our plate chokes, grid chokes, input transformers, etc....

http://www.dhtrob.com/impressies/amtrans_sats.php

We love to hear from you

Questions, comments, and order inquiries can be communicated to us via several different  SMS, chat, and messenger apps.

Via KIK:

Download Kik by going to m.kik.com on your phone (it's free and crazy fast). My Kik username is "mqracing" - add me!


Via Whatsapp: please contact me first by email

Via BBM: please contact me first by email 

Via Facebook: please contact me first by email 

My email is acrosound@aol.com 

DIY Plans: HTS-5504-1

Hello folks:

We've had a lot of inquiries on the MQR-5504 power transformer which was used in the Baby O and Bugle circuits designed by Gordon Rankin of Wavelength Audio fame.

Since we are a really small (nano sized :=) winding house and are frequently booked pretty solid--- we aren't able to accomadate building this power transformer in-house any longer. It's just not efficient for us to produce these.

Enter Heyboer transformers. I contacted them and asked if they would have an interest in building these for our customers. I've supplied them with the original blueprints so that they could make an electrical equivalent. 

The new part # for units sourced through Heyboer is HTS-5504-1. You can and must order direct from Heyboer. Units produced by Heyboer will be covered by their warranty if any.

They will have a spec sheet available for this part number.

Pricing as relayed to me will be $130 for singles and $110 each if ordered in pairs.

ALL questions and queries should be directed to Heyboer. 

phone: 616-842-5830 or email at phil@heyboertransformers.com

MSL

TL-404

10 khz square wave

TL-404 frequency response

TL-404

MagneQuest works best with the following tubes.

Custom-Built MQ-565s on Sale

****FOR LIMITED TIME, CUSTOM-BUILT MQ-565s!****

We have SOLD OUT pairs of M6 nickel pinstripe MQ-565s in stock. These come in black oxide steel covers, but could be switched into brass bell ends for an additional fee.

These babies have a primary impedance of 7100 ohms CT with UL taps, and a secondary impedance of 8 & 16 ohms, MOL 17.5 watts.

Nickel lams are increasingly harder to find at any price, and these puppies are not a regularly stocked item, so snatch up these nickel pinstripe MQ-565s before they're GONE!

$400 per pair M6 nickel pinstripe

We'll accept payment via PAYPAL (you pay shipping) or by U.S. POSTAL MONEY ORDER (in which case, shipping is on us).

Email acrosound@aol.com if you have any questions or would like to place an order.

Peerless catalog of 20-20 Series output transformers

 

Click on the photo above to enlarge.