[CQ-Contest] Thoughts on automatic low-power bandpass filters

cosson-dimitri cosson-dimitri at bbox.fr
Thu Nov 22 08:01:08 EST 2018


About OM6BPF, for info, I would give a 10/10 and would buy the same if I had to redo it.
Doing contest in SO2R (low power), I never noticed any interference between radios (even with the 40m beam 3m above  my OB11-5 beam on the same tower) except of course on harmonic frequencies.

That said, I don't understand how you can remove interferences between radios if you don't have band pass filters after the amplifiers...

73 de Dimitri F4DSK 

-------- Message d'origine --------
De : w5wz at w5wz.com 
Date : 22/11/2018  00:56  (GMT+01:00) 
À : cq-contest at contesting.com 
Objet : [CQ-Contest] Thoughts on automatic low-power bandpass filters 

I use ICE 419B band pass filters between my transceivers and amplifiers. 
  They work, but I realize that others may work better.  To my knowledge, 
these are the players in the low power (200 watt) automatic band pass 

New prices listed
$318 ICE 419B
$505 Dunestar Multi Band Remote Switched Bandpass Filter
$700 DX Engineering 419 Automatic Band Pass Filter Systems
$700 AS-419 - "BandPasser II"

Are there other systems out there?

What is your experience with each of these?

How would you rank them?

Has anyone modified and published a "how-to" to modify the ICE system 
for better performance?

--Scott, W5WZ
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