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- Category:
- All Antenna Accessories
- Manufacturer:
- Dual Antennas
DUAL 4M HIGH POWER BAND Pass Filter - 70 mhz
SKU :
97-139
- Category:
- All Antenna Accessories
- Manufacturer:
- Dual Antennas
DUAL 4M HIGH POWER BAND Pass Filter - 70 mhz
SKU :
97-139
DUAL 4M HIGH POWER BAND Pass Filter - 70 mhz
In stock
Out of stock
SKU
97-139
£249.95
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About DUAL 4M HIGH POWER BAND Pass Filter - 70 mhz
70 - 70.5 MHz 300 W Low Loss Transmitting Band Pass Filter for 4 Meter band
Intended to be used with transceivers like Icom IC-7100, Yaesu FT-847, transverters and linear amplifiers up to 300W output.
Although intention of this filter is to be used as transmitting filter, design allows also to be used as receiving filter before wideband LNA to protect sensitive device from strong out of band signals.
This BPF will suppress any signals from HF 1.8 - 28MHz stations 50-54MHz, FM, 144 MHz and 432MHz (430 - 440MHz).
Filter will reduce TVI problem or your problem with neighbours with strong HF, 6m, 88-108MHz, 2m or 70cm transmitters.
Measured data on the assembled filter with HP8753ES network analyzer full 2-port calibrated are presented below.
Measured Return Loss - S11 (CH1) and Insertion Loss - S21 (CH2). Characteristics of 70 - 70.5 MHz Bandpass filter for up to 300 W Transmitter.
Achieved results on a built Bandpass filter
- 1.8 MHz: < -100 dB
- 3.8 MHz: < -100 dB
- 7.1 MHz: < -100 dB
- 14.15 MHz: = -84 dB
- 21.2 MHz: = -73 dB
- 28.4 MHz: = – 64 dB
- 50 MHz: = -36 dB
- 51 MHz: =- 34.5 dB
- 70 MHz: = -0.24 dB
- 70.1 MHz: = -0.24 dB
- 70.25 MHz: = -0.24 dB
- 70.5 MHz: = -0.25 dB
Harmonics and interfering signals
- 88 MHz= -25 dB
- 98 MHz= -36 dB
- 108 MHz= -41 dB
- 140.2 MHz = -54 dB
- 144.1 MHz = -55 dB
- 432.1 MHz = -62 dB
These excellent results were achieved by careful selection of components and design of the filter.
Band Pass filter will suppress any harmonic emission from your transceiver or linear amplifier.
SWR from 70 MHz to 70.5 MHz:
4 Meter Band. Flatness of insertion loss on working frequency:
Suppression of harmonics and interfering signals on VHF and UHF:
Similar VHF band-pass products for 4 meter band:
4 meter band, 70 MHz Bandpass filter (Receiving Economic) far Ham radio: 70-70.5MHz 4 meter band, 70 MHz-bandpass-filter (100 W / Receiving) far Ham radio
DELIVERY
We aim to dispatch all parcels within 24hrs. We are normally able to dispatch parcels SAME DAY where orders are received before 2.00pm Monday to Friday.
Whilst we try our best to ship same day, we cannot guarantee delivery time. You will however receive tracking details as soon as your order has been processed.
Please note that we do not process orders over the weekend, so orders placed after 2pm on Friday will not ship until Monday.
Please allow an extra processing day for international orders to enable us to complete export/import custom clearance declarations.
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