Fw: Fw: Re: Fw: Re: [softrock40] Re: Bandpass filter smilter
- --- In email@example.com, windy10605@... wrote:
> You would expect the third harmonic to be the predominant one with
> filtering. You are using the DDS-60 for the OSC on the SR-40,right ? set
> to receive 1Mhz ? What are you doing to measure the harmonics ?Kees,
> 73 Kees K5BCQ
I'm using a DDS30 set to 4mhz connected to base of SR40 OSC transistor
with feedback caps removed. I have a HP654 generator with calibrated
output attenuators. By using one of ROCKY'S DB lines as a reference
the test generator can be adjusted to the same line and the attenuator
read as the difference in db.
Please connect that MiniCiruit transformer and verify my results.