Description
Nowadays the AC mains network is heavily polluted by various domestic appliances, industrial electrical consumers etc. This can lead to buzzy toroidal transformers (especially the power ones). Proposed DC trap (blocker, filter) will remove or at least lower the buzzing.
Schematic is similar to this one used in well known Vladimir Shushurin’s Lamm-1 amplifier. An article with in-dept explanation of how DC blockers work can be found on Rod Elliot’s site (https://sound-au.com/articles/xfmr-dc.htm).
Here is offered device capable to handle VERY HIGH CURRENTS (up to 30 Amperes intrinsic current handling!!!) assembled in a steel case – black powder coated.
Because of such high currents using a standard PCBs is not possible. Instead of that a 2mm. thick pure copper bussbars are used to connect the filter’s parts.
In order to carry such high loads the part’s values are upraised with 4 x 47 000 uF capacitors, 25W power resistor etc. For further description of the High-Power DC Blocker see here: High-Power DC Blocker Unit
Note that the Blocker undergone a redesign and now it has 6 discrete diodes which allows it to block DC shifts up to 2V!
The capacitor block is firmly connected to the bottom of the case with brackets and rubber sheet.
Because of many customers’ requests was designed this version of the HIGH-POWER DC Blocker with an input cable gland and two AC outlets of various types. Such a configuration allows not only to utilize the max. current handling capabilities of this Blocker but also brings to the customers the ability for using a cable and an AC plug of their own needs and taste.
The only thing the user must do is to connect the input cable to the Blocker’s input copper plate, AC outlets and the chassis ground.
The input cable gland can accept a cable with outer diameter up to 20 mm.
The output AC outlets can be EU Schuko, UK type, US type, AU/NZ type, French type, Switzerland type, Brazilian type, universal type and Double US-type.
And since the customer may not possess an electrician skills, necessary for wiring the input cable and the AC plug to the unit, the finished version of the High-Power DC Blocker fitted with 1, 1.5 or 2 meters of VIABLUE™ power cable with wires’ cross section 4mm² and Schuko/US NEMA 1-15P type VIABLUE™ AC Power Connector can also be ordered.
NOTE: Since the internal wiring of the input cable takes approx. 25-30 cm., the effective outer length of the input cable is decreased accordingly!!!
There are 4 rubber feet on the bottom of the case which ensure that case will not scratch the underlying surface.
Dimensions of the unit: 18x22x14 cm. (WxDxH)
Unit’s weight: 3 kg.
What the buyer will receive:
The package will contain 1 pcs. FULLY ASSEMBLED and tested HIGH-POWER DC trap/blocker/filter for toroidal transformers (toroids) in steel case.
The unit will be shipped with Priority AirMail Registered (or equivalent courier service where applicable)/DHL/FedEx services. The tracking number will be sent to the customer after shipment.
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