I own Pavel's filters and can testify that they work amazingly well in SO2R and
M/S setups, especially as part of a triplexer based system. No cross-band
interference at all at full legal power. Even the highly sensitive Icom 7300
does not suffer from any overloads.
I have also operated at two major M/M stations that use stubs. The difference
is night and day in favor of the filters. If I were to do it again, I will
chose Pavel's filters again (I am actually buying more triplexers and HP BPFs).
Rudy N2WQ
Sent using a tiny keyboard. Please excuse brevity, typos, or inappropriate
autocorrect.
> On Apr 28, 2017, at 4:36 PM, Pavel <un7lg@shaw.ca> wrote:
>
> Peter,
>
>> It has better numbers as 4O3A, DG0SA, VA6AM.
>
> It is hard to compare my filters with your design despite the fact that they
> are very close by circuits.
> I think we had a different specifications for the design.
>
> - I designed BPFs not for a maximum band isolation. BPFs were optimized to
> be used with Triplexer.
> - I achieved better than -85dB band isolation together with triplexer (this
> is more than sufficient number) with good Return Loss and low Insertion Loss
> - the minimum in-band ripples and the best Return Loss was a goal ( NOT a
> maximum band isolation) for the design to get Triplexer and BPF's Impedances
> very close to 50ohm
> - my filters desinged and built for up to 4000 PEP watt output power
>
> You never published Return Loss achived for the design to compare filters
> by all numbers and not only by band isolations
>
> P.S.
> I cannot compare my BPFs and triplexer with coax stub's sytem as I do not
> think that building triplexer using a coax stubs could be a good idea.
>
>
> Pavel
> VA6AM
>
>> My Projects: https://va6am.com/
>>
>
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