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Conference vmszoo::rc

Title:	Welcome To The Radio Control Conference
Notice:	dir's in 11, who's who in 4, sales in 6, auctions 19
Moderator:	VMSSG::FRIEDRICHS

Created:	Tue Jan 13 1987
Last Modified:	Thu Jun 05 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1706
Total number of notes:	27193

1222.0. "looking for Motorola pressure transducer chip" by GIDDAY::CHADD () Thu Jun 14 1990 21:23

Can anybody help me please.

I am trying to build a Barometric Pressure Gauge for setting up the comp on the
racing engines and am unable to locate a Motorola pressure transducer MPX100A.
All the local suppliers are quoting 8-10 weeks delivery. 

Could anybody give be the name of a supplier I can order the component using 
Visa and have a mail order service to Australia.

At the weekend we had our AMPRA Championships which was the first Australian
team selection trail for the 1991 World Champs in Italy. We took out 2 
Australian records and blitzed the competition by over 20 seconds in 6 rounds. 
If we can get another fast time at one of the two remaining trials it looks 
like I will be going to Milano (sp) in 91.

Thanks

John

T.R	Title	User	Personal Name	Date	Lines
1222.1	home brew pressure measurements	ABACUS::RYDER	perpetually the bewildered beginner	`Fri Jun 15 1990 04:55`	15
	>> build a Barometric Pressure Gauge I don't know about a source for the Motorola pressure transducer MPX100A, but I have made my own manometer (a loop of vinyl hose with colored water in the bottom of the loop) to measure pressure and/or vacuum for an application testing air pumps --- it worked quite well. What pressure levels do you want to measure? How rapid a response? >> [possibly] going to Milano Congratulations! Alton
1222.2	try Newark Electronics	SALEM::PISTEY		`Fri Jun 15 1990 08:11`	22
	John, I have located the part (MPX100A) on page 70 of Newark Electronics catalog # 110. They are headquarted in Chicago, but I have a contact in Methuen Mass. I will call in an hour to request availability. They do take Visa. Newark Electronics 500 north pulaski rd chicago, illinois 60624 312-784-5100 telex 671-8690 newark of cgo fax 312-638-7652 The above is their Export Department They are located all over this country and Canada.
1222.3	Thanks for the input	GIDDAY::CHADD		`Fri Jun 15 1990 18:45`	8
	Alton, The purpose of the pressure gauge it to measure the atmospheric pressure on race day as it effects the engine setup (comp, plug, etc. selection) Re: Newark; I will give them a try Thanks very much. John
1222.6	Do you have spec's on the Casio	GIDDAY::CHADD		`Mon Jun 18 1990 19:25`	22
	RE: The Casio watch Mark, Does the book of words or promo's give any spec's on the accuracy. The actual number of millibars displayed in not the problem; however the temperature compensation is. All we really want to know is what head clearance required to a specific barometric pressure not caring if the unit of measure is millibars or widgets. I will build up a table to show the required clearance. In events like World Championships you could have 1 1/2 - 2 hours between rounds and the conditions; pressure and temperature can change substantially in that time. Normally the Pylon is early in the morning before Aerobatics when the most dramatic change takes place. The Aerobatic guys like to lay in, and let us get up with the sparrows. Thanks for the thought and it it is good enough it will save some considerable effort. John
1222.7	Will try to bring in the manual	CSC32::M_ANTRY		`Tue Jun 19 1990 10:48`	11
	I will try to bring in the owners manual tomorrow. I do know that the altitude is +- 20 feet in measurement. But keep in mind that temp/pressure affect that measurement. re: the motorol sensor. We have a guy that got two of them by asking some part company for a sample. With one he built his own airbourne recording altimeter that he puts in his sailplane. With the other he built us a electronic vacumn control switch that we use on our vacumn pump when bagging composite wings. He has since tried to find them and is having the same trouble you are.