HF BANDPASS FILTER

Description

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TACTICAL RADIO GEAR, LLC
HF Single Band Bandpass Filters
BPF-200
Amateur Radio, Military HF, Commercial HF, and Marine Communications system
Made in the USA
Single Band HF Bandpass Filters
Bandpass filters are essential, in preventing receiver front end damage during multiple HF radio operation. Tactical Radio filters are available for all HF amateur bands, including 6 & 2 meters.
All models are supplied with UHF Female/SO-239 connectors; N-connectors can be substituted.
Designed to provide a roll-off outside each Amateur band; these filters bring the benefit of a dramatically lower noise floor; for improved single-band, weak signal reception; necessary for contest and Field Day operations; or simply crowded band conditions! These compact HF Transmit/receive filters, accomplish out-of-band suppression, that effectively eliminates noise and interfering signals. Simply place the filter in-line between transceiver, antenna or an amplifier.
If you are planning a DXpedition, a contest, or simply need the enhanced performance that a bandpass filter can provide, your radio needs these filters. Tactical Radio Gear, filters are the most cost-effective, single band filters on the market. The cutting-edge advantages, that these exceptional filters can provide; to improve image, and intrusive harmonic problems, for mono-band, multi-radio contest settings cannot be overstated.
Tactical Radio Gear, filters are essential for use with transmit multiplexers, as these filters will augment the separation needed to tolerate multiple radios on different bands at the same time - on the same antenna.
When used in combination with multiplexers; known as multi-band transmit combiners; it is essential for each multiplexer band  to provide the additional isolation necessary to allow the operation of multiple transceivers; all transceivers in a particular situation, can operate in chorus, unhindered by the signals from radios operating on the other bands - or even on the same antenna.
The Tactical Radio, BPF-200 series filter design, is based on a 3-pole configuration(s), that maintain a 50 Ohm impedance, and low insertion loss.
These HF Transmit/receive Bandpass Filters, are of tremendously high-quality, and precisely designed to limit the RF bandpass to a single Amateur band.
Computer modeled in Spice, the design is L-section matching to the capacitive coupled resonator; excellent for cascading without parasitic pass-bands. The filters are symmetrical, thus the input and output are not critical.
Hi-Q
Precision Silver Mica capacitors, and heavy-duty inductors, are used in the L/C tuned circuits. Frequencies harmonically related to the central frequency from upper & lower side are attenuated  30dB or more.
Each filter is assembled, and individually tuned on a state of the art computer testing system.
Insertion: Typical, <0.5
Rejection: Typical, >40db band-to-band
Power Handling: 200W
Impedance (ohms): 50
Termination VSWR: <1.04
RF Connector Type: UHF female, SO-239 or N - connector. Others type(s) available on request.
Enclosure: Extruded aluminum
Weight (in): 1.000 in.
Width (in): 1.000 in.
Depth (in): 2.000 in.
Ship Weight: <1-lb.
VSWR & POWER CONSIDERATIONS
Hi VSWR will generate damaging RF voltages, and currents in a bandpass filter. VSWR is a reality that we have to be attentive to; and Tactical radio gear, has made every effort, to protect the filter components from these potentially damaging forces.
These designs are over-engineered, with vigilant consideration to component selection. No expense was spared to insure the reliability and performance of our filters.
The weak-link in most Bandpass filters; at these power levels, in a high VSWR condition, are the capacitors?. Tactical Radio Gear, uses High-Frequency, High-Current, High-Voltage, Silver Mica capacitors; ideal for use where multilayer ceramic caps are not recommended because of cracking. The natural mica dielectric retains its extremely high-Q to many megahertz; and is free from thermal cracking. Silver Mica capacitors are Ideal for tuned L/C Circuits & High RF current. Unlike NPO ceramic capacitors, these capacitors are rock stable - no change with time, V & f and a temperature Range of -55 ºC to +125 ºC. Individual capacitance Tolerance: ±5% @ 500 Vdc. While RoHS Compliant.
All the inductors in our filters are wound with the largest possible gauge wire, consistent with sensible design practices. Depending on the band, the toroid cores when used, are selected for the largest gauge wire, and minimum turns, to minimize IR losses/heating.
Not withstanding the robust design, operator(s) should endeavor to maintain a minimum VSWR when using these filters.
Tactical Radio Gear, BPF-200 model filters, are designed for use with 100W/200W PEP transceivers.
Note: The BPF-200 filter(s)  can be operated @ a 100% duty cycle. SSB speech (50% duty), CW average power is roughly equivalent to speech.
Consider using our
PROTEKTOR Band Pass filter By-Pass product
, in-order to conveniently take the filter out of line, without having to disconnect coax cables and filters.
See listing on eBay.
Before adding to cart, please choose the band(s) desired at the bottom of this page.
Choose Your Band Below:
BANDS IN RED CAN BE ORDERED ON EBAY. Select the band at checkout.
6 Meters: BPF-100-6
10 Meters: BPF-100-10
12 Meters: BPF-100-12
15 Meters: BPF-100-15
17 Meters: BPF-100-17
20 Meters: BPF-100-20
30 Meters: BPF-100-30
40 Meters: BPF-100-40
60 Meters: BPF-100-60
80 Meters: BPF-100-80
160 Meters: BPF-100-160
see tacticalradiogear.com for more information