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Dummyloads and Filter units for amateur radios
If QRM/QRN to strong or your radio create harmonics ......
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     viditors since  Juli 2012:


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TP Filter 150W







TP Filter 750W






Preselektor












Display Controller







At end of 2013 we had the wish to  create additional products to grow up our hobby and for blocking QRM and QRN at short wave bands for signal quality. The result of this development are different high quality filters without compromises for your amateur radio.
The filter units are developed directly für amateur radio systems and base on LC circuits high order. We use only high quality units and built with Mica capacitors, COG SMD units and original Amidon iron powder cores. The result are very good datas of the filters and low loss over transmission ways.



Available filter systems from us:
Behind the headlines are the links with descriptions, manuals and measurement results.

1.    9-band, 300W Low-Pass filter for short wave-PA's (for more info click here)
6 switchable filter ways, loaded up to 200W CW or 300W SSB PEP,
10A relays contacts, solid construction
This filter provide 30dB suppression of harmonics at 1. and follow harmonic frequencies and have only
0,3 - 0,6dB transmission loss.
dimensions (lengh x wide x high): 160 x 100 x 37mm

                                                                          price for Lowpass-filter 300W: 124,50 €  +  shipping


2.
  9-band, 1,3kW Low-Pass filter for short wave-PA's (for more info click here)
6 switchable filter ways, loaded up to 1000W CW or 1,3kW SSB PEP,
10A relays contacts, solid construction
This filter provide 30dB suppression of harmonics at 1. and follow harmonic frequencies and have only
0,3 - 0,6dB transmission loss.
dimensions (lengh x wide x high): 160 x 100 x ca. 100mm


                                                                             price for Lowpass-filter 1,3kW:  259 €  +  shipping


3.   high-signal 9-band-Preselector
(for more info click here)
9 switchable band pass filter was with 30dB selection, 18 dB pre-amplifier with OIP3 =34dBm(!), 16dB
Attenuator, can controlled by remote, bypass function, TX / RX switching with PTT or VOX for up to
300 watts CW with 10A relais, 1206 COG capacitors and Amidon iron powder cores, over voltage protection
This filter block outband signals with 30dB (5 S-steps) and make it easier for the TRX mixers to do a good job.
dimensions (lengh x wide x high): 160 x 100 x ca. 40mm

optional available: Controller with LCD Display, button panel and CAT interface


                     
Price preselector with pre-Amp., attenuator, without controller:           178 € + shipping

                      Price for complete preselector system with case and CAT-controller:   315 €  + shipping


4.  Controller with LCD display for preselector 
(for more info click here)
Controller for short wave preselector with LCD display, 6 button panel for dand UP/Down, Set,
Bypass,TX / RX switching, Pre-Amp and attenuator, remote interface via I/O or COM port with
CAT comands, show status of remote controlled functions on display, real COM RS232 (no COM converter requiered).


                                           price for controller with LCD display and button pcb:    84 €
+ shipping
 

Frontview_1_preselektor
front view SW-Preselector with case

SW_preselector_backside
Backside SW-Preselector
5.  SW-Preselector as complete unit with alu-case and CAT-controller
9 switchable band pass filter was with 30dB selection, 18 dB pre-amplifier with OIP3 =34dBm(!), 16dB
Attenuator, can controlled by remote, bypass function, TX / RX switching with PTT or VOX for up to
300 watts CW with 10A relais, 1206 COG capacitors and Amidon iron powder cores, over voltage protection
This filter block outband signals with 30dB (5 S-steps) and make it easier for the TRX mixers to do a good job.
All connection sockets at backside, 2x PL UHF sockets, 1x 2,1mm hole pin connector (+12 volts power), 1x 15 pin sub-D socket (remote interface + CAT).

Dimmensions (W x L x H):   ca. 103 x 168 x 60mm

This system is shipped as complete unit with aluminium case and CAT controller inside. The SW preselector as final unit are not on stock and built on request. This process require 2-3 week delivery time. Please contact us when you want this system.


                       
Price for complete preselector system with case and CAT-controller:   315 €  + shipping