In stock
Overall rating: 5.0 / 5 from 7 reviews.
Review topics: [].
"This has certainly reduced the interference from a strong AM broadcast station near my home to the point that it is virtually undetectable. I would recommend this device to anyone needing to eliminate AM broadcasts stations from their amateur equipment."
"BCI works great. Unfortunately none of the AM stations i browse are close enough to still hear, but that's a testament to how well it rejects the lower broadcast AM bands."
"Without it, I can not use my IC-705 at home due to local broadcast stations."
"For years, had my solid state amp going into bypass for no apparent reaaon. This resolved my bypass issue."
"Cleared the broadcast band interference. Well-built and economically priced."
"Works Nicely!"
"Fixed problem Palstar la1k goes to bypass Now fine"
MORGAN SYSTEMS HIGH PASS FILTER for AM BROADCAST BAND · Accessories & Components
A replacement, service, interface, or modular accessory for a documented product or system.
Why operators make room for it
Field failures rarely wait for a convenient repair bench, so the right documented component can be the difference between improvising and operating.
That is where MORGAN SYSTEMS HIGH PASS FILTER for AM BROADCAST BAND enters the kit. This product was designed to combat the interference of commercial AM radio broadcasting in the frequency range of 560KHz to 1,700KHz , which can cause destructive interference to other receiving services in the local area within several miles of the broadcast transmitter site.
The operator gets a specific way to complete, adapt, or maintain the intended product without confusing physical fit with full RF, power, environmental, or structural compatibility.
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See what this product is best suited for, what the documented setup needs, and the boundaries to confirm before deployment.
Field failures rarely wait for a convenient repair bench, so the right documented component can be the difference between improvising and operating.
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Verify electrical, power, and structural requirements where applicable
This product was designed to combat the interference of commercial AM radio broadcasting in the frequency range of 560KHz to 1,700KHz, which can cause destructive interference to other receiving services in the local area within several miles of the broadcast transmitter site.
There are two types of AM interference with which you should be aware. The first is called fundamental overload, which is simply the signal distortion noticed in your receiving apparatus when the broadcaster's fundamental transmitted frequency (1,000KHz, 1,250KHz etc.) is so strong that the received signal voltage presented by the signal to your receiver is too great for the receiver's input circuits to handle. This type usually causes repetitive reception of the broadcast signal at many unrelated frequencies across the high frequency spectrum. The cure is to use a high-pass filter. The Morgan M-400x or M-402x serves to lessen the broadcaster's fundamental signal without attenuating signals above 1.8MHz or 3.5MHz, model dependent.
The second type of interference is more difficult to deal with. If the interference is found on direct multiples of the broadcasters fundamental transmitted frequencies (for example: a broadcaster on 1,000KHz, with interference on 2,000KHz, 3,000KHz, etc.), then the interference is caused by the broadcaster's harmonic content. These transmissions are emanating from the broadcaster's transmit site and cannot be lessened effectively in the field. If the latter type of interference persists in your case, the only useful method of dealing with the harmonic energy is to contact the broadcaster's station directly by phone and ask the chief engineer at the station for direct assistance. Although broadcasters are required by law to meet certain transmitter purity standards it is possible that enough energy at harmonic frequencies may still leak out and that near field interference can occur.
INSTALLATION
BCB filter installation is very simple. The units are not polarized and can be installed in either direction. However, during the manufacturing process they are tuned with input and output in certain directions for best performance, and are labelled as such. Filters are rated for 200 watts power and should be installed after transmitter and before amplifier or tuners. After installation a reduction of noise may be noticed which is the residual noise you have been tolerating before buying the filter. Sometimes the noise drop is dramatic, and other times less noticeable, but the reduction of reception in the broadcast band should be very noticeable. Normally you will still be able to hear local am broadcast stations even with the filter installed but at least they will no longer cause destructive interference to higher frequencies. Be sure that a short distance ground terminal connection is pat of your receiving station. A ground terminal is included and mounted to the filter chassis for this connection. Electric service box grounds and cold water pipes in most cases are very poor grounds and should not be used if good performance is required. The best ground is the shortest, most direct path to the soil, reasonable performance is still possible, however even with no ground.
SPECIFICATIONS:
1. Easy returns
Eligible products may be returned within 30 days under the published policy and authorization process. A 20% restocking fee may apply; international orders and Final Sale items are not eligible.
2. One-year limited warranty
Qualifying defects in materials or workmanship are covered under the complete published warranty terms.
3. The right help
For antenna setup or performance questions, visit Technical Support. For order-status questions, email orders@chameleonantenna.com. Read the Warranty, Returns & Service guide before shipping anything.
Where can I find setup guidance?
Open the Chameleon Knowledge Base from this page for product manuals, application notes and documented configurations.
Do you ship internationally?
Available destinations and charges are shown during checkout. International orders may take longer and can be subject to destination-country taxes, duties or carrier procedures outside our control.
How do I get help?
For technical product questions, visit Technical Support. For an existing order, email orders@chameleonantenna.com from the order email and include the order number.
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