Lidmotor's Penny circuit help needed.

[TinselKoala]

Here's what I get:
First, "normal" orientation
Second, the "swapped" orientation: note the negative voltage excursions

It does this with the MPSA18, the 2sc710 and another thing called a "603" that I found many of in old TV chassis.

[Legalizeshemp420]

I get nothing like that.

[TinselKoala]

Hmm... of course I just realized the signal of the swapped config isn't the collector signal anymore it is the base signal. So if I move the probe, too, over to the bottom of the base resistor/capacitor...that is, still on the collector of the transistor, I get the "normal" signal again.

[TinselKoala]

I get nothing like that.

Well... hmmm.

Try lowering the input voltage back to 0.5 v
Try using the MPSA18 transistor, just to see if the sim will do what my hardware does

other than that I'm stumped.

My BC337 transistors will probably take a week to get here. They are supposedly coming from Colorado, we'll see, I guess.

[Legalizeshemp420]

Well... hmmm.

Try lowering the input voltage back to 0.5 v
Try using the MPSA18 transistor, just to see if the sim will do what my hardware does

other than that I'm stumped.

My BC337 transistors will probably take a week to get here. They are supposedly coming from Colorado, we'll see, I guess.

I will tell you that with the circuit you see and changing the transistor (I did this a few times already) to a MPSA18 the BC337 blows it away.  MUCH higher peaks in both voltage and current and the MPSA18 would not do these 4 transistors with the 1.2V whereas the BC337 has no trouble in the sim.