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Array Solutions

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(214) 954-7140
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(214) 954-7142

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 FilterMAX IV New!

Flash!!     The FilterMax III is now replaced by the FilterMax IV:

More info will be added soon!

 

Band Pass Filter System with removable W3NQN Filters

 

 

FilterMax III with BandMaster III on 160m

FilterMax III with BandMaster III on 40m

 

bullet200W Power Rating

 

bulletW3NQN design 3 resonator Filters

 

bullet2nd harmonic rejection typically 70+ dB

 

bulletSWR less than 1.2:1 across band

 

bulletVery low insertion loss

 

bulletHand tuned for maximum performance

 

bullet4 control methods

 

These filters are the famous W3NQN filters designed for low insertion loss and low SWR across an entire band with emphasis placed on maximum rejection of second harmonic energy.

160M, 80M, 40M, 20M 15M and 10M. Filters for other bands can be replaced.  A unique feature which allows quick repair of a blown filter and use of WARC bands filters too!

The filters can be selected via front panel knobs, remotely by applying +12 for each individual band to the rear panel control connector, or by our new 4 wire control interface which is the same control interface as the Bandmaster III and EightPak.

All transmit filters are rated for 200 Watts.

Front panel features a bypass mode as well.

 Manual Download

 Buy it here >Hamation FilterMax III

 

 

Measured Band to Band Rejection

  1.8 MHz 3.5 MHz 7 MHz 14 MHz 21 MHz 28 MHz
1.8 MHz X 50db >60db >60db >60db >60db
3.5 MHz 55db X 52db >60db >60db >60db
7 MHz >60db 55db X 45db >60db >60db
14 MHz >60db >60db >60db X 40db 50db
21 MHz >60db >60db 56db 42db X 28db
28 MHz >60db 55db >60db >60db 45db X

Typical Filter Response

 

Interconnection diagram