Let's do a summary of the history involved here.
1. Early 2022, I purchased 3 electrodes (Stuffer, OMG, Decimator), 2 power boxes (2B, E-Stim Remote), and the low-profile cable direct from E-Stim Systems.
2. Later 2022, I received the order and checked everything out. The 2B on battery power was disappointing so I put it back in the box and used the Remote box with the Stuffer. Neither box had adequate intensity with the OMG.
3. July 2023, I purchased conductive rubber electrodes and tried the 2B on high with the power adapter. Those electrodes had good intensity; still inadequate with the Stuffer.
>>4. I opened this thread asking for guidance so I would NOT break my 2B!
5. Still July 2023, ordered the Large Torpedo to try it.
6. August 2023 (last month), received the Large Torpedo and found that it had better intensity so I actually used it a fair amount.
>>7. 31 August 2023, I was shocked to discover channel B dead while running Waterfall 80% intensity (80:100 on adjustments, high mode, AC adapter). After contacting E-Stim Systems to get my 2B repaired, I decided to stim with the Stuffer on channel A running Waterfall 90% intensity (80:100 on adjustments, high mode, AC adapter). The stimulation was only enough to feel it and lasted about 20 minutes. Both channels dead!
8. I did discuss the failure of my 2B box on a discord server and received input from several members. None of them are E-Stim Systems haters! Instead, I received information on the output circuit and why it fails with larger electrodes and higher power levels (80%+). Prior to this conversation, I was told that I needed a smaller electrode to have a better stim experience.
>>9. I shared my understanding of the 2B here and you can see how the admin responded.
admin wrote: ↑Sun Sep 03, 2023 3:47 pm
Riddle wrote: ↑Sun Sep 03, 2023 1:54 am
admin wrote: ↑Mon Jul 17, 2023 10:13 am
it depends. we have test units that have run for literally days, but there are so many variables in your question it is impossible to answer.
Si
The correct answer would have been "No, there are no concerns regarding a channel overheating because adequate precautions in the circuit design have been taken."
The true answer is "There are significant concerns regarding overheating a channel and causing permanent channel failure, but we have not bothered to perform adequate testing to quantify it."
To other customers: The 2B has not been adequately designed and tested for use with the larger premium electrodes; there is a significant risk of 2B circuit damage.
Really. so you are now an expert on our designs? Do you work for us? No? Then I suggest your opinion and your assumptions are incorrect.
To say 'significant risk' when you have no idea how many units are sold... You appear to be basing your comments from a few posts on social media...
The 2B has been designed to cope with overheating and overloads, but like everything things can always be taken too far, but later units have increased protections in place, and the design has always been created to fail safe, ensuring the intrinsic safety of the user and the expense of a component.
Si
Having seen the schematics for the 2B, read and comprehended them to include the BJT (bipolar junction transistor) operating in the linear region (generates heat), and understand why 2B customers learn to not use large insertable electrodes with their power box; I believe that makes me enough of an expert to make my statements above. Do I work for you? Obviously not, because I would have demanded E-Stim Systems adequately test the 2B on max (100%) power for all electrodes: I believe either that would have been done or I would have been fired for not leaving that issue alone.
Admin, I noticed that you attacked my credibility instead of the facts upon which my understanding used. How many 2B units have been sold and how many of them never fail is completely irrelevant to this thread. How about you let us all know how many customers who purchase an electrode sized Large Torpedo and above with AC adapter that have an output channel fail? The "significant risk" I mentioned entered my thinking when BOTH 2B channels failed on me in less than 24 hours! Social media revealed that to be common understanding. Please read my comment to other customers again.
Riddle wrote: ↑Sun Sep 03, 2023 1:54 am
To other customers: The 2B has not been adequately designed and tested for use with the larger premium electrodes; there is a significant risk of 2B circuit damage.
I believe that is true of all 2B versions. So, admin, would you like to bet on my 2B box being able to power the Stuffer electrode (Waterfall, 100%, 80:100, high mode, AC adapter) for an hour? Would you like that live-streamed for verification of the results? Of course, that must wait until after you fix both channels of my 2B and get it back to me.