Hi,
As per Rob Sherwood, NCØB measurements, IC-7300 and IC-7610 OVF (overflow)
level is -10dBM out of a pass-band signals.
It means Triplexer+BPFs set MUST deliver a better than that number to allow
operate a new SDR radios.
>From 4O3A website his set has -10dBM at 1600watts and -7dBm at 3000W level.
It means those radios could fail with such a system.
Pavel
VA6AM
My Projects: https://va6am.com/
> -----Original Message-----
> From: CQ-Contest [mailto:cq-contest-bounces@contesting.com]
> On Behalf Of rjairam@gmail.com
> Sent: Sunday, March 18, 2018 1:13 PM
> To: .. VE5ZX
> Cc: cq-contest@contesting.com
> Subject: Re: [CQ-Contest] ICOM 7610 & C31XR
>
>
> Hi Syl,
>
> I am not sure what you mean. The IC7610 doesn't do full
> duplex, therefore you cannot receive and transmit simultaneously.
>
> If I were using the tri feed with two radios I would want
> nothing less than the 4O3A combiner for full isolation plus
> individual bandpass filters.
>
> http://www.4o3a.com/products/high-power-filters/combiner/
>
> In fact I don't know anyone who has a working tri-feed, and
> this requires only a single coax from your tribander, better
> isolation too.
>
> 73
> Ria, N2RJ
>
> On Sun, Mar 18, 2018 at 9:05 AM, .. VE5ZX <ve5zx@hotmail.com> wrote:
> > I am considering purchasing a Icom 7610 to use with my C31XR with
> > separate feedlines and 500 watt linear.
> >
> > Any ideas how much filtering I need to ensure protection of
> the 7610
> > SDR frontend?
> >
> > I have a couple of ICE filters I could use
> >
> > tnx - Syl - VE5ZX
> >
> >
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