[CQ-Contest] W3NQN Bandpass Filters (Was: Re: 419 bandpass filters.....)

[Michael Dinkelman]

Well, I can't tell you which are better (because, with my limited
test equipment, a TenTec Vector Network Analyzer, they look similar).
I'll leave that for those more knowledgeable than me to argue about 
though I have blown up Dunestars in the past.

However, I would REALLY like to express my APPRECIATION to W3NQN
for publishing his design as I am currently building a second set
based on it. I was pretty happy with the first set as I really have a 
hard time telling the other radio is on unless I listen to the exact 
harmonic and even then, my front end doesn't seem to be in any danger 
(100 watt levels). Haven't blown one up either (though I have warmed the 
20M one up with some long cq sessions).

For sure, it probably would have been cheaper just to buy them
but I've enjoyed the building process (I'm winding the 15M toroids
this evening) and learned a lot.

Many thanks to W3NQN for his contribution.

73
dink, n7wa





Tim Duffy K3LR wrote:
> Hello Zoli!
> 
> I must respectively disagree with your statement concerning marketing hype in
> this case.
> 
> I and others have made extensive lab and real world measurements between many
> filters and
> all have confirmed the superior performance of the W3NQN design.
> 
> Please send me your measurements so that I can understand your comments.
> 
>>From my stand point there is no placebo effect concerning proper engineering.
> Only factual measurement data.
> 
> 73!
> Tim K3LR
> 
> 
> Zoli Pitman HA1AG wrote:
> 
>> Jeff Maass wrote:
>>> While ours are not nearly so old, we have four
>>> sets of W3NQN filters on the four full-power station
>>> positions at the PJ2T station on Curacao, plus a
>>> spare set. No doubt, the W3NQN filters are Best of
>>> Breed.
>> Is there a marketing campaign going on or what ? I did measure ICE,
>> Dunestar and W3NQN filter sets on proper (=calibrated) test equipment
>> and found that the claimed superiority of W3NQN filters is a hype.
>>
>> However, placebo effect works here too :))
>>
>> 73, zoli ha1ag
>>
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