Lash up Direct Conversion Receiver

[pwdrive]

Hear is the test I did, not under ideal conditions as I am limited to what test gear I have.
The aim of the test was to try and get a better idea of unwanted harmonics rejection.
Test frequency is 10.1 Mhz.
Harmonic selected (from the 1 Mhz fundamental) is the 8th (8 Mhz)
Regen det tuned to 2.1 Mhz.
RF amp tuned to 10.1 Mhz.
Harmonic Gen. tank tuned to 8 Mhz.
Regen control set to just past the point of oscillation.
RF gain set to max.
Sig gen was connected across the antenna input, modulation off, antenna disconected
Output measurement consists of an Avo 8 set to the 10 ma AC range and connected directly across the speaker.
With the volume set to a tolerable level the sig gen was tuned to 10.1 Mhz to get a beat, the beat was adjusted to approx 400 cps the sig gen output was adjusted to give a 1 ma reading on the Avo, the results are given below the sig gen input voltage to it's attenuator was kept constant at all frequencies, note that the maximum output from this sig gen via its attenuator is 25 mv. All control settings on the regenerodyne remained at their initial settings.

8th harmonic:
Plus = 10 uv @ 10.1 Mhz for 1 ma o/p
Minus = 15 mv @ 5.9 Mhz " "
9th harmonic:
Plus = 6 mv @ 11.1 Mhz " "
Minus = more than 25 mv @ 6.9 Mhz " "
10th harmonic:
Plus = 25 mv @ 12.1 Mhz " "
Minus = more than 25 mv @ 7.9 Mhz " "

7th harmonic:
Plus = 13 mv @ 9.1 Mhz " "
Minus = 22 mv @ 4.9 Mhz " "
6th harmonic:
Plus = more than 25 mv @ 8.1 Mhz " "
Minus = 20 mv @ 3.9 Mhz " "
5th harmonic:
Plus = more than 25 mv @ 7.1 Mhz " "
Minus = 13 mv @ 2.9 Mhz " "

Lawrence.