[RFI] Why we badly need "party line" materials for all hams
k6ll at juno.com
Tue Jul 20 13:07:17 EDT 2004
On Mon, 19 Jul 2004 18:25:21 -0400 "Tom Rauch" <w8ji at contesting.com>
> Almost any ham has the ability to provide useful data. All
> he has to do is:
> 1.) Use a step attenuator to calibrate the dB change in his
> particular S meter.
> 2.) Drive out away from poles, and record noise levels or
> weakest readable signal levels
> 3.) Go into the BPL area, and note the change and provide it
> in dB for a given receiver bandwidth.
> S-units are useless.
If you don't have an external precision attenuator, you can
use the step attenuators (including preamp bypass, like Kenwood's
AIP) built into most radios to make a Very
Good Approximation of dB level changes. Just change step 3 of
Tom's procedure to:
3.) Drive into the BPL area and enable various combinations of
internal step attenuators to bring the s-meter back to the
reading noted in step 2. Some interpolation may be required, but
you will be very close.
Dave Hachadorian, K6LL
Big Bear Lake, CA
More information about the RFI