<html> <body> Dean, <x-tab>        </x-tab>All this is well and good and I'm sure that I incorrectly used the BTU terminology however my point remains the same. Grab the shorter bar and it's too hot to hold. Grab the longer bar and you can hold it all day. That would seem to produce an imbalance to me. I can't seem to wrap my mind around any other outcome, air currents not withstanding. Greg At 08:55 PM 2/13/2004, you wrote: <blockquote type=cite class=cite cite>A watt is a power unit, like horsepower. A BTU is a heat or energy unit. Power is energy sustained over time, as in so many btu’s per hour. So if we are starting with a power unit, watts in this case, we multiply by a  time unit to get how much total energy is produced. 1 btu/min = 17.57 watts or 1 btu = 17.57watt-minutes. So to convert 25 watts burned over one hour to btus:   25 watts X 60 minutes / 17.57 watt-minutes/BTU = 85 BTU   So a 25 watt D-chaser bar burning for one hour produces 85 BTU’s of heat. Notice the length of the bar does not enter the equation. Since the shorter bar has to dissipate the same amount of heat in a shorter length, it stabilizes at a higher temperature. But the total heat produced is the same.   Dean  <br= > Dean May             cell 812.239.3359 PianoRebuilders.com   812.235.5272 Terre Haute IN  47802   -----Original Message----- From: pianotech-bounces@ptg.org [<a href="mailto:pianotech-bounces@ptg.org%5DOn"= eudora="autourl">mailto:pianotech-bounces@ptg.org]</a><a= href="mailto:pianotech-bounces@ptg.org%5DOn" eudora="autourl">On</a> Behalf Of Greg Newell Sent: Friday, February 13, 2004 6:19 PM To: Pianotech Subject: Re: D-C 25 watt rods   John, <x-tab>        </x-tab>I looked at this somewhat differently than you describe below. I am not looking at 25 watts as 25 BTU's but rather just how much energy is being used by the rod. Since the short one and the long one use the same amount of electricity but are in fact different in size they it seems to follow that they would produce a different amount of heat. This is where my idea of an imbalance comes in. Is my thinking correct here? Greg At 03:51 PM 2/13/2004, you wrote: Hi Greg, 25W concentrated in a short bar would feel hotter than, 25W in a long bar. Just think, one has more area to heat, and greater dissipation, so feels cooler. The shorter bar has the heat concentrated, and would feel hotter. I saw a picture of an 8 cylinder motorcycle, it was the same engine as powers some cars. I would think that as a motorcycle, it would appear to have more power, than the same engine pushing a car. Best regards, John M. Ross Windsor, Nova Scotia, Canada <a href="mailto:jrpiano@win.eastlink.ca">jrpiano@win.eastlink.ca</a> ----- Original Message ----- From: <a href="mailto:gnewell@ameritech.net">Greg Newell</a> To: <a href="mailto:webb50@comcast.net">Ruth Phillips</a> ; <a href="mailto:pianotech@ptg.org">Pianotech</a> Sent: Friday, February 13, 2004 3:20 PM Subject: Re: D-C 25 watt rods Listers and Listees, <x-tab>        </x-tab>Thank you for the feedback. While it is not as much discussion as I had hoped it, I believe, had the desired result. While Ruth Phillips mentions below that the 25Watt Rod was discontinued as a system staple I have to disagree. The part number G6PS (top item on page 22 of the Jansen catalogue includes both a 2' and a 4' 25 watt rod. I also disagree with others that posted (Don I think it was) who said that the two rods producing very different amounts of heat would not necessarily produce an imbalance. I paraphrased to clarify my point but I can't see how it could be anything but. Don's argument was that I did not take into account convection currents. It would seem to me that if one was too hot to hold and the other could be held all day being only luke warm then any convection currents would be more in the category of WIND to not produce an imbalance. I can agree with others who have posted that they never noticed any problems. Neither have I. Even though the two bars produce an entirely different amount of heat they are not necessarily doing damage. It seems that it could certainly be said, however, that they are not doing the best job possible. Any further thoughts? Greg At 06:25 PM 2/11/2004, you wrote: Greg - the 25 watt rod was discontinued as a system staple long ago.  On the soundboard, once compression has taken place, drying the wood is not going to make it disappear.  When you install a system you will find that the wood changes - that is about all you can say with certainty.  With the right equipment, properly installed, the system will stabilize the wood.  Once it stabilizes, you can make corrections based on what you find at that point.  It may take some time as there will be residual change, such as there is when you change pitch.  Every change causes reactions, and you keep at it until the change is so miniscule that the reaction is meaningless. I hope this helps to clarify what you found. Ruth Phillips     Greg Newell Greg's piano Forté <a href="mailto:gnewell@ameritech.net" eudora="autourl">mailto:gnewell@a= meritech.net</a> <hr> <div align="center"></div>   --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (<a href="http://www.grisoft.com/"= eudora="autourl">http://www.grisoft.com</a>). Version: 6.0.580 / Virus Database: 367 - Release Date: 2/6/2004 <hr> <div align="center"></div> _______________________________________________ pianotech list info: <a href="http://www.ptg.org/mailman/listinfo/pianotec= h"= eudora="autourl">https://www.moypiano.com/resources/#archives</a> <br= > --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (<a href="http://www.grisoft.com/"= eudora="autourl">http://www.grisoft.com</a>). Version: 6.0.580 / Virus Database: 367 - Release Date: 2/6/2004 Greg Newell Greg's piano Forté <a href="mailto:gnewell@ameritech.net"= eudora="autourl">mailto:gnewell@ameritech.net</a> --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (<a href="http://www.grisoft.com/"= eudora="autourl">http://www.grisoft.com</a>). Version: 6.0.588 / Virus Database: 372 - Release Date:= 2/13/2004</blockquote> <x-sigsep></x-sigsep> Greg Newell Greg's piano Forté <a href="mailto:gnewell@ameritech.net"= eudora="autourl">mailto:gnewell@ameritech.net</a></body> </html>