[UK-CONTEST] Was NFD originally an emergency capability test?

[Dave Lawley]

Yes but I'm not talking about a mixer, only a feed from the IF

In the old days when you used a Q5er did you really consider that a 
second receiver?

And you haven't answered the point about an SDR with all this built in. 
How many 'IF strips' does an SDR have? How many could it have?

73, Dave

Bob Henderson wrote:
> Oh Dave...... the glorious shades of grey.........
> 
> If an outboard unit comprising mixer, IF, demodulator and AF stages were
> attached to a broadband RF amplifier within your transceiver, wouldn't this
> too count as NOT a second receiver?
> 
> Just what extent of independence would a second receiver need to qualify as
> such?
> 
> 73 Bob, 5B4AGN
> 
> On 8 June 2011 08:56, Dave Lawley <dave at g4buo.com> wrote:
> 
>>> From the rules as currently drawn, it appears local Skimmer use is
>> precluded
>>> in both the Restricted and QRP sections due to only one receiver being
>>> allowed.  (Two in the case of a transceiver with built in second
>> receiver)
>>> The limit of a single antenna would anyway provide a further challenge.
>> Not true Bob, as I put in my G3RCV/P writeup you could run a Skimmer
>> from the IF of your rig. Pausing from TX for say 30 seconds would give
>> it time to find a great number of CQing stations. Further, I suspect
>> this capability may become standard in SDRs in a few years' time.
>>
>> Ironically, a tight first IF roofing filter will limit the range of the
>> Skimmer. So, you make it switchable.
>>
>> 73, Dave G4BUO
>>
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