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Coax Common Mode Noise Filter/Mini-Balun Models
Model #
CMNF-500-50
MC-1-500
MB-1-500-50
CMNF-500-75 or
CMNF-TV
CMNF-500-VHF
CMNF-1500HF
CMNF-5000HF
© Palomar Engineers, Inc., 1965-2020
Palomar-Engineers.com
COAX COMMON MODE
NOISE FILTERS,
MINI-CHOKER, MINI BALUN
PRODUCT MANUAL
Range
PEP
CMRR
(MHz)
(ICAS)
20-38
1.8-65
500
1.8-65
20-38
500
MHz
20-38
1.8-65
500
20-30
15-180
250
20-38
1.8-65
1500
20-38
1.8-65
5000
Size/notes
3" x 2" x 1", SO-239 I/O
dB
3" x 2" x 1", SO-239 In,
dB
Balanced output
3" x 2" x 1" ", "F" connector
dB
I/O
3" x 2" x 1" ", SO-239 I/O
dB
4" x 4" x 2" ", SO-239 I/O
dB
4" x 4" x 2" ", SO-239 I/O
dB
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Related Manuals for Palomar CMNF-500-50
Summary of Contents for Palomar CMNF-500-50
- Page 1 3” x 2” x 1” ”, SO-239 I/O CMNF-500-VHF 15-180 20-38 4” x 4” x 2” ”, SO-239 I/O CMNF-1500HF 1.8-65 1500 20-38 4” x 4” x 2” ”, SO-239 I/O CMNF-5000HF 1.8-65 5000 © Palomar Engineers, Inc., 1965-2020 Palomar-Engineers.com...
- Page 2 SELECTED, its coax sheath still contributes to the noise level of the connected antenna through the common connector ground! Example installation of CMNF-500-50 on an Icom 756 Pro III with two antenna inputs and using the internal antenna switch. Each coax shield is isolated from the other by the common mode filter.
- Page 3 Noise Filter Installation and Use The CMNF-500-50 is designed to be placed in a 50 ohm coax line entering the transceiver (or between the transceiver and amplifier). The CMNF-1500 (1500 watts PEP) or CMNF-5000 (5KW PEP) should be placed at the end of the coax into the station before any antenna switches.
- Page 4 MC-1-3000 (3KW) Maxi-Choker™ - shown with MC-1-500 (500 watts) Mini-Choker™ - Same specs optional ground, static bleeder installed as CMNF-500-50 Measured common mode noise rejection for CMNF’s and MB-1-500 Mini-Balun – typical up to - 38dB! CMNF-500-50 © Palomar Engineers, Inc., 1965-2020 Palomar-Engineers.com...
- Page 5 CMNF-1500HF CMNF-5000HF Revision 2/9/2020 © Palomar Engineers, Inc., 1965-2020 Palomar-Engineers.com...
- Page 6 Common mode noise suppression with the CMNF series of filters is typically 25-36 dB which is equivalent to 4-6 “S” units on radios with 6 dB/”S” unit or may be more on radios with 3dB/”S” unit. Check www.Palomar-Engineers.com for latest product updates. © Palomar Engineers, Inc., 1965-2020 Palomar-Engineers.com...