The bhi GroundBreaker audio unit isolates the grounds on your bhi DSP noise cancelling product or other ancillary equipment from those of the radio system, eliminating potential ground loops and RFI problems from your audio due to earth loop problems or a poorly matched antenna.
bhi GroundBreaker solution
So you’ve tried providing a better ground system, wrapping the audio leads round ferrite rings, clamping ferrite beads onto the cables, running your systems up on to different power supplies, checking the connections etc. The bhi GroundBreaker is possibly the solution as this passive in-line audio product will totally isolate the grounds of bhi DSP noise cancelling product or other ancillary equipment you may be using from those of the radio system.
These small compact in-line audio connection units come in various impedances covering all the main values (10 k Ohm, 600 Ohm and 8 Ohm, mono and stereo connections) currently used in many audio systems.
The bhi GroundBreaker is easy to use and simply connects between your Receiver/transceiver and audio DSP/ancillary equipment using 3.5mm connections. It should be noted that the unit works both ways round. Try to keep the leads as short as possible to minimise the effect airborne RF pickup.
Balanced to Unbalanced audio systems
Most audio amplifiers used in radios are Class A or AB. They normally have a single ended (unbalanced output that works against ground, however, recently some manufacturers have started using balanced audio amplifiers and Class D (switch mode) amplifiers. These present a different problem as most audio ancillary products on the market (unless they are for professional audio) use unbalanced inputs.
The Ground breaker can be used to isolate the balanced audio output of the set and allow the ancillary unbalanced input to be unaffected.
Maximum Power Handling
The GroundBreaker, does have limits to its power handling. The 600 Ohm and 10k Ohm devices are capable of handling the normal audio levels that can be found in most, if not all, audio systems. The 8 Ohm device is only meant to be used at powers up to 0.5 Watts. This is meant to allow interfacing to most bhi audio products and not meant for the transfer of power into un-powered speaker units.
|Product Code||Type||Maximum power|
|GB8M||8 Ohm Mono||500mW|
|GB600M||600 Ohm Mono||100mW|
|GB10KM||10 k Ohm Mono||100mW|
|GB8S||8 Ohm Stereo||500mW/Channel|
|GB600S||600 Ohm Stereo||100mW/Channel|
|GB10KS||10 k Ohm Stereo||100mW/Channel|
Select the relevant GroundBreaker unit above to suit your connection type and impedance
EI3KD and EI4DQ both spotted our 2m beacon from qth locator IO51 for a distance of almost 4200 km. At 15.11 Z of May 20th,2015 rs... Read more
What is DMR? Digital Mobile Radio (DMR) was developed by the European Telecommunications Standards Institute (ETSI) and is used worldwide by pr... Read more
“YOTA 2018 South Africa is now over, and one of the highlights of the youngsters’ week were the kit building sessions. They had the opport... Read more
The Nashville Tennessean newspaper recently featured the story of a 104-year-old ARRL member who contributed to NASA’s effort to put the first humans... Read more
The ICQ Podcast has announced a partnership to establish an annual “Homebrew Heroes Award” to recognize individuals, groups, or organizations that hel... Read more
The WSJT Development Group has announced the “general availability” release of WSJT-X version 2.1.0. This major upgrade formally introduces FT4 as a f... Read more
The International Telecommunication Union (ITU) accepted the European Radio Amateurs’ Organization (EURAO) as a sector member at the recent meeting of... Read more