[RFI] Tecsun PL-660 for chasing RFI [Was: Is Icom IC-T90a AM-mode good for chasing RFI?]

[CR]

Let's not get too focused on which receiver has the best sound or 
S-meter; MY RFI hunting has almost all been with loops or yagis -- and 
by ear.    Often enough, for the last few hundred meters or so, I've 
used a homemade loop mounted on a scanner such as a VR-500.  For the 
loops I mean, see the examples in figure 2 at
http://www.edn.com/electronics-blogs/emc-emi-rfi-esd/4378152/An-EMC-Troubleshooting-Kit--Part-1a-Emissions-

FWIW department; I could use a FS receiver or spectrum analyzer, but 
once outside a lab, things are usually too messy to make them worth 
hauling around. I once used my AOR AR-5000 for some tests, and dragging 
that over grass with batteries and an EMCO loop on a cart was no fun.

If you REALLY need an objective relative measurement, perhaps an RMS 
meter on your receiver's audio output (ideally with AGC off) might be 
the best way to get one. Using a product detector, the output is almost 
exactly proportional to the input -- but be wary of saturation and 
overload. The rest of the time, IMO, the ears have it.

Cortland
KA5S

On 9/22/2014 8:13 PM, qrv at kd4e.com wrote:
> 	Is it possible to get at that switch & create a flat
> setting? (Add another switch which interrupts the High wire
> to add a High/Flat choice? I'm guessing they are adding or
> removing a cap - so adding a 1/2 value cap should = Flat.)
>
> 	Someone mentioned needing to pull the batteries if left
> sitting, which I'm guessing could be solved via a micro-switch
> somewhere in the battery-to-radio line.
>
> 	WDYT?
>
> David KD4E
>