Smoothest, and best, store purchased Joule Thief I have seen yet.

[Legalizeshemp420]

Yes, it had 3 models that rebadged it and I forgot what the other one was.

S9013 and if I were to design this circuit for my needs I would use the S8055 over the S9013 since they fight for price supremacy a bunch.

[Legalizeshemp420]

Your scope is showing a frequency of about 1.7 MHz.

1712.5Khz using the 0.01s gate (only 1 digit past the decimal point doing this).

btw, I looked in the box and my original receipt from JDR was in it.  1/28/1991 (my 26th birthday) and it cost me $199.95 from them.  So, my 50 to 80 dollars was way off (must have been something else I purchased but never got back from the flood/fire of 2006).

[TinselKoala]

Data sheets:

[Legalizeshemp420]

We crossed posted it seems.

btw, I looked in the box and my original receipt from JDR was in it.  1/28/1991 (my 26th birthday) and it cost me $199.95 from them.  So, my 50 to 80 dollars was way off (must have been something else I purchased but never got back from the flood/fire of 2006).

The S8055 has a higher amp rating and from what I saw, when I looked yesterday, it had better gain too.

[TinselKoala]

1712.5Khz using the 0.01s gate (only 1 digit past the decimal point doing this).

Yep. I counted just about 6 full cycles in 3.5 microseconds (7 full divisions). 6/0.0000035 = 1714285.714285... and respecting sig digs that's 1.7 MHz. Pretty good for eyeballing a YT screenshot of an analog scope, eh?