On 6/17/2017 8:53 AM, Ben Hall wrote:
I've been toying with the idea of modifying one of the units to add internal DC-blocking and resistors to ground for DC-load. For DC block, seems like I could very carefully slice the trace on the board by the SMA connector, bridging the gap with an SMA capacitor.
So I tried this today. Carefully put a gap in the traces using an Xacto knife on all but one of the output ports and bridged them with 100pF NPO SMD capacitors. I'll put it on the VNA at work tomorrow...but measurements using my noise source and AirSpy SDR receiver plus the SpectrumSpy software shows that it works with somewhere around 10dB of loss which is very close to the loss of the unmodified unit. :)
So modifying a commercial unit is an option to consider. thanks much and 73, ben, kd5byb _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
