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NEW! Direct from MagneQuest
Robin Hood
Series
SE Output Transformers

The Robin Hoods' are a newly designed series of four single ended output transformers. The aim of the series is two- fold. First is to offer a transformer for folks who are bi-amping and don't need the huge inductances and AC power capabilities of say our legendary FS-030 single ended air-gapped output transformer. The second aim/goal is to make these the best VALUE output transformers available in the marketplace. The "Robin Hood" series is named in honor of the man who took from the rich, as in riches of MQ vaults, to give to the poor, as in DIY lovers who crave high value without sacrificing top quality.

To get great sound, we have incorporated design techniques that we have used successfully in our DS Series of output transformers, as well as the successful interleaving techniques that we have used in our EXO series of parafeeds.

The new Robin Hood Series Output
Transformers are arguably the best value
transformers in the marketplace

The primary copper circuit is well designed to keep resistive losses at a minimum (the dcr is approx. 185 ohms). The copper losses from the full secondary and the full primary are equal in magnitude. The primary inductance is carefully designed to fully support the published low frequency extension of each model at the maximum stated power level. The total (AC and DC combined) magnetic flux density is kept BELOW 16kg in each model offered in this series. Therefore, these will not saturate or "run out of iron" when used within their published specs.

Simply put, these are really nice coils. We didn't skimp much in the goodies department. All of the RH series are made with Teflon insulation on the inside. All soldered connections are made with silver bearing solder. All units are housed in a nonmagnetic solid brass channel frame with easy to solder to lugs.

Currently, four different models will be available in the following configurations. All are 5K primary impedances with a UL tap at 43%. The first three models are designed to carry unbal dc currents. The last type listed is for Parafeed applications.

NOTE
: Ms. R. Hood is not standin' on a Robin Hood Series, which are Solid Brass Channel Frame. She's perched on an FS-030 (but she still loves the Robin Hood like her own)
.

Robin Hood Series RH-40
$125 each

5,000 ohm pri with 43% UL tap
8 and 16 ohm secondaries
40 madc unbal current capacity
40 henries of primary L
5 watts @ 30 hz (-3db low freq pwr. response)
small signal frequency response (varies a bit with source impedance) should be good from
about 15 hertz to 30,000 hertz minimum.

Recommended applications: designed to support the 45, 71A and other similar triodes.

Robin Hood Series RH-60
$125 each
5,000 ohm pri with 43% UL tap
8 and 16 ohm secondaries
60 madc unbal current capacity
30 henries of primary L
10 watts @ 45 hz (-3db low freq pwr. response)

small signal frequency response (varies a bit with source impedance) should be good from about 25 hertz to 30,000 hertz minimum.

Recommended Applications:
first example from WE for 300B
plate volts 350
grid bias -76
dc plate current 50 madc
5000 ohm load impedance
6.2 watts output
second and third HD; -30db and -45db respectively

second example from WE for 300B
plate volts 400
grid bias -87
dc plate current 60 madc
5000 ohm load impedance
8.3 watts output
second and third HD; -30db and -46db respectively

Robin Hood Series RH-80
$125 each

5,000 ohm pri with 43% UL tap
8 and 16 ohm secondaries
80 madc unbal current capacity
20 henries of primary L
15 watts @ 50 hz (-3db low freq pwr. response)
small signal frequency response (varies a bit with source impedance)
should be good from about 25 hertz to 30,000 hertz minimum.

Recommended applications: high current 300B



Robin Hood Series RH-PF   (Parafeed SE)
$Inquire
5,000 ohm pri with 43% UL tap
8 and 16 ohm secondaries
ZERO madc unbal current capacity
greater than 200 henries of primary L with M6
12.5 watts @ 20 hz (-3db low freq pwr. response)

small signal frequency response (varies a bit with source impedance) should be good from
about 10 hertz to 30,000 hertz minimum.

Recommended applications: many, many known applications

Please note: the parallel feed version can be custom built on nickel lams or the new generation "domain refined" silicon steel laminations. Inquiries preferred by phone for this option.


Order Information - Direct from MagneQuest

The Robin Hood Series Transformers are only available DIRECT from MagneQuest. See details below 

1) Delivery will be four to six weeks out. Please be patient here.

2) MQ Direct accepts payment via Paypal or USPS money orders only.

3) shipping in the continental US (lower 48 states) is $15.00 a pair.


Info/Application
............................................ MagneQuest Forum Tech Support
MQ Robin Hood Email Orders....................... acrosound@aol.com
PayPal Account
............................................ acrosound@aol.com

Link to PayPal via PAYPAL

1404 East Bristol Street Philadelphia PA 19124 USA
Voice: 215-288-4816 Fax: 215-288-4816

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