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U.S. vs FIR pad discussion

Some of these heat pads have blind spots.

My Totalman has at least 1 inch of unheated spot. I’m going to make a modification by cutting this part and getting heat from all sides.

I’m also thinking about including the ultrasound along with the heat pad as they are the best heat sources available for PE. I think I’ll use the US at the end of the routine.


Initial: APR/19 BPEL16(6,3)x13,5(5,3)

Current: NOV/21 BPEL18,3(7,2)x13,5(5,3)

If there are hot/cold spots, you can even it out with a layer of aluminum (soda can thickness) between the pad and the shaft.

Originally Posted by Holdion
Could you put a thermometer on the pad. And tell me what temperature it gives. To understand what temperature the skin has to tolerate. To get the right temperature on the inside.
Is the heat evenly distributed in the pad? If not, why not?

IMO, 45C is the ideal peak temp for an external heat source. Beyond 47C the risks skyrocket with sustained exposure.

Originally Posted by 5.5Squared
Thanks for splitting this out. I think it’s a conversation that’s over due.
I have always ranked heating sources as:

1. US (most effective)
2. FIR (middle)
3. IR Heat lamp (least effective)

Both US and IR lamp require you to be naked/exposed during the routine.
FIR allows me to wear lounge pants while at my standing desk. The passive nature of FIR is what sold me on the approach.

This is where my approach differs dramatically. I advocate a single 40min treatment every 7-10 days, so whether I can do it discretely doesn’t really matter to me. But when I tested the FIR lamp I can tell you it was very cumbersome. To get even reasonable tissue temps I had to subject myself to dermal burns on the thighs and the vacuum cup got hot enough to promote glans blisters. Not fun at all for a very mediocre result. I agree, US is still far an away the best heat source for my protocol.

I will say that I’ve had very good results of very even reliable heat across the majority of the shaft with a combination of Autosound US placed ventrally and heating pad placed dorsally set at 44C. This might be my new favorite combo. Completely hands free.

I think we would all agree that US does a better job of heating. It is faster and more efficient. I like FIR as it is passive, I do my hanging while working so need my hands free for my keyboard.

In terms of the effectiveness of FIR. All I can find is the following posts

manko007 - Gaining volume with Kyrpa

scienceguy - let’s see what happens

StrangerComeKno - Hanging with FIRe

All show very similar results for the 20 min Mark

40.7 C
40.5 C 40.8 C
40.3 C

I ran my tests for 40min and managed to get to the 42C mark between 27.5 and 30minutes depending on the pad I was testing. It would be good to get more data here for others testing after the 20minute mark.

From reading all the tests, depth tested may need investigated. As it seems the maximum tested depth is roughly 5cm from the tip. I think an extender would be needed to hold the penis on place for this, which I don’t have so I won’t be doing it 😉

Originally Posted by Tutt
I will say that I’ve had very good results of very even reliable heat across the majority of the shaft with a combination of Autosound US placed ventrally and heating pad placed dorsally set at 44C. This might be my new favorite combo. Completely hands free.

I haven’t checked in on the US thread in a while and haven’t heard of the Autosound, sounds promising. I like hands free. If you have the Autosound device on ventral side and heating pad on dorsally how do you measure temperature?

Originally Posted by scienceguy
I think we would all agree that US does a better job of heating. It is faster and more efficient. I like FIR as it is passive, I do my hanging while working so need my hands free for my keyboard.

In terms of the effectiveness of FIR. All I can find is the following posts

manko007 - Gaining volume with Kyrpa

scienceguy - let’s see what happens

StrangerComeKno - Hanging with FIRe

All show very similar results for the 20 min Mark

40.7 C
40.5 C 40.8 C
40.3 C

I ran my tests for 40min and managed to get to the 42C mark between 27.5 and 30minutes depending on the pad I was testing. It would be good to get more data here for others testing after the 20minute mark.

From reading all the tests, depth tested may need investigated. As it seems the maximum tested depth is roughly 5cm from the tip. I think an extender would be needed to hold the penis on place for this, which I don’t have so I won’t be doing it 😉

If that pad is reaching 42C at around the 30 min mark would it make sense then to keep the pad on a further 20-30 mins?

Originally Posted by Bubks
If that pad is reaching 42C at around the 30 min mark would it make sense then to keep the pad on a further 20-30 mins?

I think it’s generally accepted that 10minutes at this temperature is enough, at least that is what I found in the US thread. Obviously pay attention to how your penis is feeling to make sure the skin or any other part is not getting to hot.

Originally Posted by Tutt
I will say that I’ve had very good results of very even reliable heat across the majority of the shaft with a combination of Autosound US placed ventrally and heating pad placed dorsally set at 44C. This might be my new favorite combo. Completely hands free.

You sold me on the multi head autosound a while back. It would be my choice if I went the US route.


BPEL: 5.5" --> 7.9" ; BPFSL: ~5.6" --> 8.5"

Progress log summary: Hanging with FIRe

"Going hard, fast and heavy is all against the scientific knowledge of tissue expansion or elongation." - Kyrpa

Originally Posted by 5.5Squared
You sold me on the multi head autosound a while back. It would be my choice if I went the US route.

Do you know where the details of that are? I missed that and it sounds interesting. If it’s in that long US thread do you have idea what month it was posted in, just to make it easier to find

Originally Posted by scienceguy
Do you know where the details of that are? I missed that and it sounds interesting. If it’s in that long US thread do you have idea what month it was posted in, just to make it easier to find

Page 64, Post #948, and some months later & Post #1935. Some of @TUTT posts. But there are more posts after page 64, the most important info is in page 64 & 129.

"Therasound Evo with the Autosound applicator"

Autosound Applicator - Hands Free Applicator for Ultrasound Therapy


Originally Posted by scienceguy
Do you know where the details of that are? I missed that and it sounds interesting. If it’s in that long US thread do you have idea what month it was posted in, just to make it easier to find

I think autosound based PE would be an application of US Gel, strap in place and heat for 20 mins. No moving back and forth, no reapplying US gel. In other words just my style.

Here’s the info from my notes

AutoSound Hands Free Applicator (use with Winner EVO or Therasound EVO Devices)

Ultrasound machine:
Therasound EVO

410-200* - Zona Med Equipment


BPEL: 5.5" --> 7.9" ; BPFSL: ~5.6" --> 8.5"

Progress log summary: Hanging with FIRe

"Going hard, fast and heavy is all against the scientific knowledge of tissue expansion or elongation." - Kyrpa

Originally Posted by 5.5Squared
You sold me on the multi head autosound a while back. It would be my choice if I went the US route.

There are three main considerations with the autosound. First it is expensive compared to the others. Second, for our purposes, I feel that the 1 second cycle between emitters is too slow. If I could choose, I would speed that up because I think it would reach higher temps better. Third, it doesn’t cover the full shaft without repositioning it. Especially right near the base and right near the glans because of the design of the paddle.

The benefits are that it heats REALLY evenly with less user error. It is hands free and doesn’t need to be moved around constantly. It cycles between 1mHz and 3mHz automatically for different depths.

For those who use it, I find that supplemental heat is highly beneficial to help the temp build and retain as it cycles.

Thanks fdersby, 5.5 and Tutt.

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