Re: Form for Koehler Toroidal Sensor

[Carl]

Rick,


I've been getting a lot of emails with questions and discussions. I would rather everyone post to the forum so that others can read and respond but so far that's not the case. I will urge emailers to post their messages in the future, get the noise floor up a bit.


I also just added the Stuart microcontroller PI detector and Mark Pauls is writing up his PIC code and a description - I will post it as soon as I get it.


I'm building the final (?) version of my magnetometer this very day. I will write up a report on this design, then move on to a PI detector. Hopefully then I will be more help.


- Carl

[Carl]

Re: -120db

Rick,


I've been getting a lot of emails with questions and discussions. I would rather everyone post to the forum so that others can read and respond but so far that's not the case. I will urge emailers to post their messages in the future, get the noise floor up a bit.


I also just added the Stuart microcontroller PI detector and Mark Pauls is writing up his PIC code and a description - I will post it as soon as I get it.


I'm building the final (?) version of my magnetometer this very day. I will write up a report on this design, then move on to a PI detector. Hopefully then I will be more help.


- Carl

[Dale Seppa]

Re: Form for Koehler Toroidal Sensor

To: John Smith and others.


John: Many thanks for your reply. If necessary I will take you up


on your offer but I will wait while I investigate other


possibilities. The problem with either the US or SA version is, as


you mentioned you wind up with a bunch of other rings that in the


real world will NEVER be used for anything so it is not only a waste


of money but a waste or world resources.


I no longer have a good scientific background so many things are


just not clear to me. It may be that the permeability of the


plastic is NOT a factor that even has to be considered. Hopefully,


one of those knowledgeable on this type of things will send us


clarification. In the meantime, I personally like your idea about


weighing the sensor. BUT, I have NOT done the math to see if it is


within the realm of possibility. IF you do the math and you do have


available a scale that is sensitive enough that it could possibly


shed some light on the subject it would be nice for ME if you could


do it and if MIGHT be of some use to you and to others. Obviously,


if someone comes up with something which shows that it is not


necessary then that is something else.


Best regards,


Dale


----- Original Message -----


From: John Smith


To: The Proton Mag Forum


Sent: Friday, February 25, 2000 5:51 AM


Subject: Re: Form for Koehler Toroidal Sensor


The Proton Mag Forum


-----Original Message-----


From: Dale Seppa


To: Magnetron Forum


Date: 25 February 2000 12:32


Subject: Form for Koehler Toroidal Sensor


The Proton Mag Forum


To Jim Koehler and all:


I just called Fisher-Price to check on the availablity of their


'Rock-a-Stack' toy which includes the large blue ring that Jim


suggests for his toroidal sensor. I had not been able to find


the thing locally but considering where I live that does not


mean much.


Anyway - I called and talked to a young lady in customer service


who seemed very knowledgeable and who had the information at her


finger tips. According to here that toy is NOT made anymore.


It has been replaced by TWO newer versions. One which is SOFT


(presumably spongy) for babies and a harder one for older


children which is SQUARE.


I used a grey import far eastern copy of the Fisher price toy,


quite a bit cheaper here in South Africa.


I would not have mentioned it if FP were still making their one.


If anyone wants one please e-mail me and I can see if I can still


get them ( and end up with a load more smaller rings :-)


I dont know if it leaks, perhaps I can weigh it and check at


intervals?


regards


John


-----------------------------------------------------


John Smith


Cavalier Electronics


L'Agulhas South Africa