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No, I intend this to be used as 20M. I just use a colorburst crystal
oscillator for signal tracing, and I used a scope to compare the
incoming and outgoing signals to measure gain.
I wired up a second stage and checked it against the schematic as I
was doing it, every trace is accounted for.
I had used ground-plane component support construction. Could that
technique reduce the gain?
--- In BITX20@..., "ajparent1" <kb1gmx@a...> wrote:
Inline and edited.
--- In BITX20@..., "eternalesquire" <eternalsquire@c...>
All,This is very low gain. The expected should be far higher in the
Next question: I have now finished building the first bidirectional
amplifier after the preselector. I injected a 3 mV signal at
3579 KhZ in each direction, and got out a 20mV phase-inverted
copy of the same signal when power in the correct direction was
applied. The fidelity is good, but the gain stages are not
even a factor of 10. Is this the expected performance?
order of of around 16DB. I would expect to see around 100mv
for 3mv in.
I'm curious why 3.579nmhz? IS thise going to be 80M version?
If so I'd suggest using T50-2(red) ferrite rings for the bandpass
filter or the required turns will be very high.
I am using all parts as specified, for transistors I am using Those should be more than adaquate at 4mhz. However, I'd suggest
MPS2222 and for switching diodes I am using 1N4148.
I know these are probably not the best of transistors, but I
want to attempt to duplicate the results per the web article.
rechecking your wiring. Make sure the capacitors are in the correct