144 - 146 MHz High Selectivity, High Q, Low Loss Bandpass Filter with SPF-5122Z Preamplifier

144 - 146 MHz High Selectivity, High Q, Low Loss Bandpass Filter with SPF-5122Z Preamplifier
Product Code: 0634
Price: 139.00€
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2m High Selectivity, High Q, Low Loss Bandpass Filter with SPF-5122Z Preamplifier

In the box embedded super low loss bandpass filter and preamplifier with SPF-5122Z


This combination consists of two devices:
1. 144 - 146 MHz High Selectivity, High Q, Low Loss Bandpass Filter
2. SPF-5122Z Wideband Low Noise Amplifier

Achieves slightly better results than separate components. Lower NF about 0.05 to 0.1 dB. Thanks to two less connectors.

Thanks to input filtering this preamplifier and band pass filter combination are much more immune to interference from strong signals out of the band.


Measured results with HP8753ES network analyzer full two port calibrated:
7 MHz = -78 dB
14 MHz = -67 dB
21 MHz = -60 dB
28 MHz = -51 dB
50 MHz = 36 dB
88 MHz = -16 dB
108 MHz = -5 dB
144 MHz = +26 dB, NF=0.7 dB, Input RL -10dB
430 MHz = -37 dB
440 MHz = -33 dB
IP3out > 33 dBm.
Power consumption +12 V / 90 mA.
Connectors: "N" Male / Female.
These excellent results were achieved by careful selection of components and design.
Measured S11, S21, S12, S22
144 MHz Band Pass filter with SPF-5122Z Preamplifier Measured HF
144 MHz Band Pass filter with SPF-5122Z Preamplifier Measured 50MHz
144 MHz Band Pass filter with SPF-5122Z Preamplifier Measured FM
2m Band Pass filter with SPF-5122Z Preamplifier Measured UHF
Positions of connectors are selected so that the filter can be directly connected to the coaxial relay as shown. Band pass filter enclosed in strong 1mm sheet brass box. Strong mechanics will ensure stability and longevity.
144MHz High-Selectivity, High-Q, Low Loss Bandpass Filter with SPF-5122Z Very Low Noise Preamplifier and QRO relay
144MHz High Selectivity, High-Q, Low Loss Band-pass filter with SPF-5122Z Low Noise amplifier connected with coaxial relay CZX-3500
This type of filter will almost nothing disturb noise performance of SPF-5122Z which is especially important in terrestrial and EME (Earth - Moon - Earth) communications. It will further ensure smooth operation in the presence of strong signals.
What others say about Bandpass filters and preamplifiers.
"I received the 2 x BPF144 filters and they work very well.  They have resolved my out of band RFI problem and made my 2M EME station more sensitive to weak signals.  The small O.2 db insertion loss is more than compensated by having the preamps operating in their linear region and not in compression caused by strong local FM broadcast and Aircraft radio systems.  It's a pleasure to do 2M EME now."
73 Paul W2HRO
"LNA test: Two LNA have the same behavior. Gain at 144MHz 25.96 dB, NF 0.68, LNA only Gain 25.73 dB, NF 0.88 dB, LNA + filter. Results seems cosistent and confirm the 0.2 dB loss of the filter.
-1db compression point happened with -3dBm input signal level."
73 Franco I2FAK
"Many thanks, good news today all staff well arrived ! I made DUTs on test this PM to the VNA HP 8510C and to the noise analyzer, congratulations all specs are very well respected ! NF it is a bit better 0.28dB on 144MHz, for the others bands as you say."
73 Sylvain F6CIS
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