[CQ-Contest] ICOM 7610 & C31XR

[Pavel]

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 at contesting.com] 
> On Behalf Of rjairam at gmail.com
> Sent: Sunday, March 18, 2018 1:13 PM
> To: .. VE5ZX
> Cc: cq-contest at 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 at 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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