[Elecraft] KBPF3A switching frequencies and performance

[w4sc]

A little back ground,,

The effort started as a result of my using WWV at 15.000000 MHz for calibrating the reference oscillator.  Tuning from 14.999999 to 15.000000 MHz I noticed a 9 to 12 Db drop in signal strength of WWV.  

I could hear relays’ switching at the 14.999999 to 15.000000 MHz boundary.  This lead to making a list of (“suspected”) switching points by tuning from low 1MHz through 30MHz listening  Looking at schematics of the KBPF3/A I  heard switching at some points that did not make sense, with the 14.999999 to 15.000000 MHz boundary being one.

It is not easy to probe the KBPF3A in my K3S-100 to check which relays are bein set/reset because of the installed KRX3A.  I have a K3S-10, but will need to install a KBPF3/A to check the 14.999999 to 15.000000 MHz boundary and   gather the information. (PENDING)

de Ben W4SC

Sent from Mail for Windows 10