Topband: Diversity RX audio example

[VE6WZ_Steve]

Rick,
The Flex 6600 has 2 SCU’s, and can have 4 slice receivers.
I think the 6700 can have 8 slice receivers.

I do not use a very narrow IF as you do. Typically I will use a 800 or 400 HZ IF filter and use the APF together with the RX equalizer set to peak at around 400Hz and diminish all other audio frequencies.  Setting your RX EQ on CW to include all those other frequencies outside your preferred CW tone is unnecessary and just adds noise.
Using a very narrow IF can be problematic when calling CQ and having callers most of the time being off my exact QRG.  With a more open filter, and even with the EQ settings and APF, I can usually hear them. Of coarse I can also “see” them on the waterfall if they are strong enough.
However…I will experiment a bit more with narrow IF filtering and check it out.

steve


> On Feb 6, 2019, at 5:43 PM, Richard (Rick) Karlquist <richard at karlquist.com> wrote:
> 
> 
> 
> On 2/6/2019 3:46 PM, VE6WZ_Steve wrote:
> 
> Regarding the APF.  I too had an FT1000D, and I performed
> the mod to the APF.  You are right, it did magically make
> signals pop out.  One of the things that made it useful
> was that it was AFTER the AGC.  Therefore, off frequency
> signals, no matter how strong, always had weaker audio
> levels than the signal that the APF was tuned to.
> 
> I am now using a Flex 6700.  I don't miss my APF because
> I can dial down the IF bandwidth to as little as 50 Hz.
> Are you saying your don't use this capability and instead
> use audio filtering?  Not following this.
> 
> How many "Spectral Capture Units" does the 6600 have?
> I can't see to find any info on the Flex site about this.
> My 6700 has two of them.
> 
> 73
> Rick N6RK