Re: Stus-List speedometer - C 35 Mk2
Maybe I was a little unclear on this last post, what I was getting at is that if you need a new (another) paddle wheel, you can have this one I removed. Bill Coleman Erie PA From: Bill Coleman [mailto:colt...@gmail.com] Sent: Monday, August 10, 2020 5:28 PM To: 'cnc-list@cnc-list.com' Subject: RE: Stus-List speedometer - C 35 Mk2 Absolutely Inconceivable!! I have an old transducer here that I cut out of my boat, with 4 Paddles, and 2 magnets. Bill Coleman Erie PA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, August 10, 2020 2:46 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: Re: Stus-List speedometer - C 35 Mk2 I verified the paddle before launch, I only have one magnet and it is there. No abnormalities found there. Bo On Mon, Aug 10, 2020 at 9:51 AM Bill Coleman via CnC-List wrote: Heh heh! No doubt where that entered my lexicon. I have at least a dozen regularly used lines from that movie! Bill From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Russ & Melody via CnC-List Sent: Friday, August 07, 2020 10:53 PM To: cnc-list@cnc-list.com Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 Hi Bill, You bring me a smile with this. It's inconceivable! I love the movie. The missus & I watch it at least once every year. https://www.youtube.com/watch?v=qhXjcZdk5QQ Cheers, Russ At 06:43 AM 8/5/2020, you wrote: It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Absolutely Inconceivable!! I have an old transducer here that I cut out of my boat, with 4 Paddles, and 2 magnets. Bill Coleman Erie PA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, August 10, 2020 2:46 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: Re: Stus-List speedometer - C 35 Mk2 I verified the paddle before launch, I only have one magnet and it is there. No abnormalities found there. Bo On Mon, Aug 10, 2020 at 9:51 AM Bill Coleman via CnC-List wrote: Heh heh! No doubt where that entered my lexicon. I have at least a dozen regularly used lines from that movie! Bill From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Russ & Melody via CnC-List Sent: Friday, August 07, 2020 10:53 PM To: cnc-list@cnc-list.com Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 Hi Bill, You bring me a smile with this. It's inconceivable! I love the movie. The missus & I watch it at least once every year. https://www.youtube.com/watch?v=qhXjcZdk5QQ Cheers, Russ At 06:43 AM 8/5/2020, you wrote: It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
I verified the paddle before launch, I only have one magnet and it is there. No abnormalities found there. Bo On Mon, Aug 10, 2020 at 9:51 AM Bill Coleman via CnC-List < cnc-list@cnc-list.com> wrote: > Heh heh! > > No doubt where that entered my lexicon. I have at least a dozen regularly > used lines from that movie! > > > > Bill > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Russ > & Melody via CnC-List > *Sent:* Friday, August 07, 2020 10:53 PM > *To:* cnc-list@cnc-list.com > *Cc:* Russ & Melody > *Subject:* Re: Stus-List speedometer - C 35 Mk2 > > > > Hi Bill, > > You bring me a smile with this. > > It's inconceivable! I love the movie. The missus & I watch it at least > once every year. > https://www.youtube.com/watch?v=qhXjcZdk5QQ > > Cheers, Russ > > > At 06:43 AM 8/5/2020, you wrote: > > > It is inconceivable that a magnet could be missing, unless you are missing > an entire leg of one of the four paddles, as they are molded right inside > the plastic. > Did you pull it out and check it with a magnet? > > Bill Coleman > Erie PA > > *Cc:* Russ & Melody > *Subject:* Re: Stus-List speedometer - C 35 Mk2 > > > What is the number o' magnets supposed you be on the paddle-wheel? If it > is more than one then one is missing, > > Cheers, Russ > > > > At 09:57 AM 8/4/2020, you wrote: > > Content-Type: multipart/alternative; > boundary="3255BA44138849C8E1038307" > Content-Language: en-US > > One possible thing is the calibration is way off. > > Joe > > Coquina > On 8/4/2020 12:21 PM, General Gao wrote: > > I wanted to come back to this thread. Did some cleaning on land, had my > daughter rotated the Hall effect sensor, the needle moved, thought it was > all good. We later launched the boat and it turned out that the reading was > off still. It read about half of what it was supposed to be. > > What would this indicate? > > Thanks, > > Bo > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Heh heh! No doubt where that entered my lexicon. I have at least a dozen regularly used lines from that movie! Bill From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Russ & Melody via CnC-List Sent: Friday, August 07, 2020 10:53 PM To: cnc-list@cnc-list.com Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 Hi Bill, You bring me a smile with this. It's inconceivable! I love the movie. The missus & I watch it at least once every year. https://www.youtube.com/watch?v=qhXjcZdk5QQ Cheers, Russ At 06:43 AM 8/5/2020, you wrote: It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Hi Bill, You bring me a smile with this. It's inconceivable! I love the movie. The missus & I watch it at least once every year. https://www.youtube.com/watch?v=qhXjcZdk5QQ Cheers, Russ At 06:43 AM 8/5/2020, you wrote: It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Only if the coating increases friction and reduces the ability to turn freely then Yup. it could. I lost a magnet a few decades ago, probably hit an small object as it looked "chipped out". Cheers, Russ At 06:39 AM 8/5/2020, you wrote: Would coating the paddlewheel with anhydrous lanolin screw up the readings? David F. Risch 401-419-4650 From: CnC-List On Behalf Of Bill Coleman via CnC-List Sent: Tuesday, August 4, 2020 10:21 PM To: cnc-list@cnc-list.com Cc: Bill Coleman Subject: Re: Stus-List speedometer - C 35 Mk2 Two. Bill Coleman On Tue, Aug 4, 2020, 8:26 PM Russ & Melody via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
That happened to me once. I was only getting 0 speed. One leg was missing, so paddle wheel wouldn't turn. replaced with my back up and functioning fine after that. On 2020-08-05 10:43 a.m., Bill Coleman via CnC-List wrote: It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA *From:*CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Russ & Melody via CnC-List *Sent:* Tuesday, August 04, 2020 8:26 PM *To:* cnc-list@cnc-list.com *Cc:* Russ & Melody *Subject:* Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
It is inconceivable that a magnet could be missing, unless you are missing an entire leg of one of the four paddles, as they are molded right inside the plastic. Did you pull it out and check it with a magnet? Bill Coleman Erie PA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Russ & Melody via CnC-List Sent: Tuesday, August 04, 2020 8:26 PM To: cnc-list@cnc-list.com Cc: Russ & Melody Subject: Re: Stus-List speedometer - C 35 Mk2 What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List wrote: Dielectric grease is made specifically for electrical use. Any auto parts store has it for about $5. Joe Coquina On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List wrote: Put some dielectric grease on the connections ;)  Joe Della Barba Coquina C 35 MK I www.dellabarba.com    From: CnC-List [ <mailto:cnc-list-boun...@cnc-list.com> mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, May 18, 2020 3:41 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2  Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised.  Thank you everyone for the kind help!  Stay safe, stay healthy.  Regards,  Bo  On Mon, May 18, 2020 at 11:42 AM General Gao wrote: thank you everyone. I really appreciate the information. I will go check and report back.  Stay safe!  Bo  On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think).  Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens.  >From the Troubleshooting section (last page) of the pdf I linked:  TROUBLESHOOTING  DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem-  A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual-  A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing.     On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel.  Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD   On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List wrote: There are (were) some generator knotmeters.
Re: Stus-List speedometer - C 35 Mk2
Would coating the paddlewheel with anhydrous lanolin screw up the readings? David F. Risch 401-419-4650 From: CnC-List On Behalf Of Bill Coleman via CnC-List Sent: Tuesday, August 4, 2020 10:21 PM To: cnc-list@cnc-list.com Cc: Bill Coleman Subject: Re: Stus-List speedometer - C 35 Mk2 Two. Bill Coleman On Tue, Aug 4, 2020, 8:26 PM Russ & Melody via CnC-List mailto:cnc-list@cnc-list.com>> wrote: What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Dielectric grease is made specifically for electrical use. Any auto parts store has it for about $5. Joe Coquina On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Put some dielectric grease on the connections ;)  Joe Della Barba Coquina C 35 MK I www.dellabarba.com<http://www.dellabarba.com>    From: CnC-List [ mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, May 18, 2020 3:41 PM To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: General Gao mailto:general.z....@gmail.com> > Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2  Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised.  Thank you everyone for the kind help!  Stay safe, stay healthy.  Regards,  Bo  On Mon, May 18, 2020 at 11:42 AM General Gao mailto:general.z@gmail.com> > wrote: thank you everyone. I really appreciate the information. I will go check and report back.  Stay safe!  Bo  On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think).  Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens.  From the Troubleshooting section (last page) of the pdf I linked:  TROUBLESHOOTING  DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem-  A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual-  A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing.     On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List mailto:cnc-list@cnc-list.com>> wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel.  Josh Muckley S/V Sea Hawk 1989 C 37+ Solomo
Re: Stus-List speedometer - C 35 Mk2
Two. Bill Coleman On Tue, Aug 4, 2020, 8:26 PM Russ & Melody via CnC-List < cnc-list@cnc-list.com> wrote: > > What is the number o' magnets supposed you be on the paddle-wheel? If it > is more than one then one is missing, > > Cheers, Russ > > > > At 09:57 AM 8/4/2020, you wrote: > > Content-Type: multipart/alternative; > boundary="3255BA44138849C8E1038307" > Content-Language: en-US > > One possible thing is the calibration is way off. > > Joe > > Coquina > On 8/4/2020 12:21 PM, General Gao wrote: > > I wanted to come back to this thread. Did some cleaning on land, had my > daughter rotated the Hall effect sensor, the needle moved, thought it was > all good. We later launched the boat and it turned out that the reading was > off still. It read about half of what it was supposed to be. > > What would this indicate? > > Thanks, > > Bo > > On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List < > cnc-list@cnc-list.com> wrote: > > Dielectric grease is made specifically for electrical use. Any auto parts > store has it for about $5. > > Joe > > Coquina > On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: > > that is what I am thinking. Would vaseline work? > > Thank you, > > Bo > > On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > > Put some dielectric grease on the connections ;) > >  > > Joe Della Barba Coquina C 35 MK I > > www.dellabarba.com > >  > >  > >  > > From: CnC-List [ mailto:cnc-list-boun...@cnc-list.com > ] On Behalf Of General Gao via CnC-List > Sent: Monday, May 18, 2020 3:41 PM > To: cnc-list@cnc-list.com > Cc: General Gao > Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 > >  > > Reporting back. followed the guide and verified the transmitter had > resistance of 1787ohms, verified there was VAC output when the paddle was > turning fast (couldn't get to the 5knots as boat is on land). Decided to > sand the connectors, and put it back, tested again, and it worked...the > connectors looked without rust, a bit surprised. > >  > > Thank you everyone for the kind help! > >  > > Stay safe, stay healthy. > >  > > Regards, > >  > > Bo > >  > > On Mon, May 18, 2020 at 11:42 AM General Gao > wrote: > > thank you everyone. I really appreciate the information. I will go check > and report back. > >  > > Stay safe! > >  > > Bo > >  > > On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List < > cnc-list@cnc-list.com> wrote: > > Yup, that's correct. If there are only two wires coming from the > paddlewheel transducer, it is likely this 'generator' type as a more modern > hall effect transducer will have at least three wires (I think). > >  > > Of course a broke wire or bad connection anywhere between the transducer > and the instrument will cause it all to not work. We would just pull the > transducer and connect it directly to the back of the instrument to see > what happens. > >  > > From the Troubleshooting section (last page) of the pdf I linked: > >  > > TROUBLESHOOTING > >  > > DISPLAY READS ZERO- The problem could be either the transmitter or the > display. Please follow the proceeding steps to determine cause of the > problem- > >  > > A. Measure the two wires of the transmitter with an ohm meter for > resistance value of approximately 2000 ohms (2K ohms). Do not spin the > paddlewheel. > > a. If unit is good, then check paddlewheel for any broken fins or missing > magnets. > > b. If unit is open (infinite resistance) then unit needs replacing. > > B. Measure with an AC voltmeter when the paddlewheel is spinning. You > should get approximately 1.0 VAC at about 5 knots of speed when unloaded > (not hooked up to display). > > INTERMITTENT READINGS- Keep the unit wired as normal and add an AC > voltmeter to where the input wires of the transmitter are connected. Motor > or sail as usual- > >  > > A. If an AC voltage is being produced but no speed indication appears on > display, then the problem is in the display. > > B. If readings only occur when voltages are produced, then the paddlewheel > is not always turning. Clean paddlewheel first and be sure it spins freely, > and then try again. If the results are the same then paddlewheel may need > replacing.  > >  > >  > >  > > On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > So if I understand it corre
Re: Stus-List speedometer - C 35 Mk2
What is the number o' magnets supposed you be on the paddle-wheel? If it is more than one then one is missing, Cheers, Russ At 09:57 AM 8/4/2020, you wrote: Content-Type: multipart/alternative; boundary="3255BA44138849C8E1038307" Content-Language: en-US One possible thing is the calibration is way off. Joe Coquina On 8/4/2020 12:21 PM, General Gao wrote: I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: Dielectric grease is made specifically for electrical use. Any auto parts store has it for about $5. Joe Coquina On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: Put some dielectric grease on the connections ;)  Joe Della Barba Coquina C 35 MK I <http://www.dellabarba.com>www.dellabarba.com    From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, May 18, 2020 3:41 PM To: <mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com Cc: General Gao <<mailto:general.z@gmail.com>general.z@gmail.com> Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2  Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised.  Thank you everyone for the kind help!  Stay safe, stay healthy.  Regards,  Bo  On Mon, May 18, 2020 at 11:42 AM General Gao <<mailto:general.z@gmail.com>general.z@gmail.com> wrote: thank you everyone. I really appreciate the information. I will go check and report back.  Stay safe!  Bo  On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think).  Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens.  From the Troubleshooting section (last page) of the pdf I linked:  TROUBLESHOOTING  DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem-  A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual-  A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing.     On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel.  Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD   On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List <<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote: There a
Re: Stus-List speedometer - C 35 Mk2
One possible thing is the calibration is way off.
Joe
Coquina
On 8/4/2020 12:21 PM, General Gao wrote:
I wanted to come back to this thread. Did some cleaning on land, had
my daughter rotated the Hall effect sensor, the needle moved, thought
it was all good. We later launched the boat and it turned out that the
reading was off still. It read about half of what it was supposed to be.
What would this indicate?
Thanks,
Bo
On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List
mailto:cnc-list@cnc-list.com>> wrote:
Dielectric grease is made specifically for electrical use. Any
auto parts store has it for about $5.
Joe
Coquina
On 5/23/2020 12:54 PM, General Gao via CnC-List wrote:
that is what I am thinking. Would vaseline work?
Thank you,
Bo
On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List
mailto:cnc-list@cnc-list.com>> wrote:
Put some dielectric grease on the connections ;)
*/Joe Della Barba Coquina C 35 MK I/*
*/www.dellabarba.com <http://www.dellabarba.com>/*
*From:*CnC-List [mailto:cnc-list-boun...@cnc-list.com
<mailto:cnc-list-boun...@cnc-list.com>] *On Behalf Of
*General Gao via CnC-List
*Sent:* Monday, May 18, 2020 3:41 PM
*To:* cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>
*Cc:* General Gao mailto:general.z@gmail.com>>
*Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2
Reporting back. followed the guide and verified the
transmitter had resistance of 1787ohms, verified there was
VAC output when the paddle was turning fast (couldn't get to
the 5knots as boat is on land). Decided to sand the
connectors, and put it back, tested again, and it
worked...the connectors looked without rust, a bit surprised.
Thank you everyone for the kind help!
Stay safe, stay healthy.
Regards,
Bo
On Mon, May 18, 2020 at 11:42 AM General Gao
mailto:general.z@gmail.com>> wrote:
thank you everyone. I really appreciate the information.
I will go check and report back.
Stay safe!
Bo
On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List
mailto:cnc-list@cnc-list.com>> wrote:
Yup, that's correct. If there are only two wires
coming from the paddlewheel transducer, it is likely
this 'generator' type as a more modern hall effect
transducer will have at least three wires (I think).
Of course a broke wire or bad connection anywhere
between the transducer and the instrument will
cause it all to not work. We would just pull the
transducer and connect it directly to the back of
the instrument to see what happens.
From the Troubleshooting section (last page) of
the pdf I linked:
TROUBLESHOOTING
DISPLAY READS ZERO- The problem could be either the
transmitter or the display. Please follow the
proceeding steps to determine cause of the problem-
A. Measure the two wires of the transmitter with
an ohm meter for resistance value of
approximately 2000 ohms (2K ohms). Do not spin
the paddlewheel.
a. If unit is good, then check paddlewheel
for any broken fins or missing magnets.
b. If unit is open (infinite resistance) then
unit needs replacing.
B. Measure with an AC voltmeter when the
paddlewheel is spinning. You should get
approximately 1.0 VAC at about 5 knots of speed
when unloaded (not hooked up to display).
INTERMITTENT READINGS- Keep the unit wired as normal
and add an AC voltmeter to where the input wires of
the transmitter are connected. Motor or sail as usual-
A. If an AC voltage is being produced but no
speed indication appears on display, then the
problem is in the display.
B. If readings only occur when voltages are
produced, then the paddlewheel is not always
turning. Clean paddlewheel first and be sure it
spins freely, and then try again. If the results
are the same then paddlewheel may need replacing.
On Mon, 18 May 2020 at 09:18, Josh Muckley via
CnC-List mailto:cnc-list@cnc-list.com>> wrote:
So if I understand it correctly, the theory of
Re: Stus-List speedometer - C 35 Mk2
I wanted to come back to this thread. Did some cleaning on land, had my daughter rotated the Hall effect sensor, the needle moved, thought it was all good. We later launched the boat and it turned out that the reading was off still. It read about half of what it was supposed to be. What would this indicate? Thanks, Bo On Sat, May 23, 2020 at 1:32 PM Joe Della Barba via CnC-List < cnc-list@cnc-list.com> wrote: > Dielectric grease is made specifically for electrical use. Any auto parts > store has it for about $5. > > Joe > > Coquina > On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: > > that is what I am thinking. Would vaseline work? > > Thank you, > > Bo > > On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Put some dielectric grease on the connections ;) >> >> >> >> *Joe Della Barba Coquina C 35 MK I* >> >> *www.dellabarba.com <http://www.dellabarba.com>* >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of >> *General >> Gao via CnC-List >> *Sent:* Monday, May 18, 2020 3:41 PM >> *To:* cnc-list@cnc-list.com >> *Cc:* General Gao >> *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 >> >> >> >> Reporting back. followed the guide and verified the transmitter had >> resistance of 1787ohms, verified there was VAC output when the paddle was >> turning fast (couldn't get to the 5knots as boat is on land). Decided to >> sand the connectors, and put it back, tested again, and it worked...the >> connectors looked without rust, a bit surprised. >> >> >> >> Thank you everyone for the kind help! >> >> >> >> Stay safe, stay healthy. >> >> >> >> Regards, >> >> >> >> Bo >> >> >> >> On Mon, May 18, 2020 at 11:42 AM General Gao >> wrote: >> >> thank you everyone. I really appreciate the information. I will go check >> and report back. >> >> >> >> Stay safe! >> >> >> >> Bo >> >> >> >> On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >> Yup, that's correct. If there are only two wires coming from >> the paddlewheel transducer, it is likely this 'generator' type as a more >> modern hall effect transducer will have at least three wires (I think). >> >> >> >> Of course a broke wire or bad connection anywhere between the transducer >> and the instrument will cause it all to not work. We would just pull the >> transducer and connect it directly to the back of the instrument to see >> what happens. >> >> >> >> From the Troubleshooting section (last page) of the pdf I linked: >> >> >> >> TROUBLESHOOTING >> >> >> >> DISPLAY READS ZERO- The problem could be either the transmitter or the >> display. Please follow the proceeding steps to determine cause of the >> problem- >> >> >> >> A. Measure the two wires of the transmitter with an ohm meter for >> resistance value of approximately 2000 ohms (2K ohms). Do not spin the >> paddlewheel. >> >> a. If unit is good, then check paddlewheel for any broken fins or missing >> magnets. >> >> b. If unit is open (infinite resistance) then unit needs replacing. >> >> B. Measure with an AC voltmeter when the paddlewheel is spinning. You >> should get approximately 1.0 VAC at about 5 knots of speed when unloaded >> (not hooked up to display). >> >> INTERMITTENT READINGS- Keep the unit wired as normal and add an AC >> voltmeter to where the input wires of the transmitter are connected. Motor >> or sail as usual- >> >> >> >> A. If an AC voltage is being produced but no speed indication appears on >> display, then the problem is in the display. >> >> B. If readings only occur when voltages are produced, then the >> paddlewheel is not always turning. Clean paddlewheel first and be sure it >> spins freely, and then try again. If the results are the same then >> paddlewheel may need replacing. >> >> >> >> >> >> >> >> On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >> So if I understand it correctly, the theory of operation for these >> generator style knot meters would simply be a 2 wire system and a voltage >> developed between the two?
Re: Stus-List speedometer - C 35 Mk2
Dielectric grease is made specifically for electrical use. Any auto parts store has it for about $5. Joe Coquina On 5/23/2020 12:54 PM, General Gao via CnC-List wrote: that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Put some dielectric grease on the connections ;) */Joe Della Barba Coquina C 35 MK I/* */www.dellabarba.com <http://www.dellabarba.com>/* *From:*CnC-List [mailto:cnc-list-boun...@cnc-list.com <mailto:cnc-list-boun...@cnc-list.com>] *On Behalf Of *General Gao via CnC-List *Sent:* Monday, May 18, 2020 3:41 PM *To:* cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> *Cc:* General Gao mailto:general.z@gmail.com>> *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised. Thank you everyone for the kind help! Stay safe, stay healthy. Regards, Bo On Mon, May 18, 2020 at 11:42 AM General Gao mailto:general.z@gmail.com>> wrote: thank you everyone. I really appreciate the information. I will go check and report back. Stay safe! Bo On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think). Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens. From the Troubleshooting section (last page) of the pdf I linked: TROUBLESHOOTING DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem- A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual- A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing. On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List mailto:cnc-list@cnc-list.com>> wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List mailto:cnc-list@cnc-list.com>> wrote: There are (were) some generator knotmeters. Coquina came with one when we bought her. If memory serves, it topped out at 10 or 12 knots and it
Re: Stus-List speedometer - C 35 Mk2
I use Vaseline to keep the barnacles and other sea life from sticking to the impeller if I forget to pul it out when we tie up after sailing. Sincerely, Neil Neil Andersen 20691 Jamieson Rd, Rock Hall, MD 21661 <mailto:neil.eric.ander...@gmail.com> neil.eric.ander...@gmail.com LinkedIn: www.linkedin.com/pub/neil-andersen/0/239/a36/ <http://www.linkedin.com/pub/neil-andersen/0/239/a36/> +++ Save money and the environment. Use Century Gothic font and save 30% of your ink *** Confidential and Privileged *** This e-mail message and any attachments are for the sole purpose of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail, and destroy all copies of the original message and any attachments. From: CnC-List On Behalf Of General Gao via CnC-List Sent: Saturday, May 23, 2020 12:55 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: Re: Stus-List speedometer - C 35 Mk2 that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List mailto:cnc-list@cnc-list.com> > wrote: Put some dielectric grease on the connections ;) Joe Della Barba Coquina C 35 MK I www.dellabarba.com <http://www.dellabarba.com> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com <mailto:cnc-list-boun...@cnc-list.com> ] On Behalf Of General Gao via CnC-List Sent: Monday, May 18, 2020 3:41 PM To: cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> Cc: General Gao mailto:general.z@gmail.com> > Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised. Thank you everyone for the kind help! Stay safe, stay healthy. Regards, Bo On Mon, May 18, 2020 at 11:42 AM General Gao mailto:general.z@gmail.com> > wrote: thank you everyone. I really appreciate the information. I will go check and report back. Stay safe! Bo On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List mailto:cnc-list@cnc-list.com> > wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think). Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens. >From the Troubleshooting section (last page) of the pdf I linked: TROUBLESHOOTING DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem- A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual- A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing. On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List mailto:cnc-list@cnc-list.com> > wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List mailto:cnc-list@cnc-list.com> > wrote: There are (were) some generator knotmeters. Coquina came with
Re: Stus-List speedometer - C 35 Mk2
that is what I am thinking. Would vaseline work? Thank you, Bo On Mon, May 18, 2020 at 3:49 PM Della Barba, Joe via CnC-List < cnc-list@cnc-list.com> wrote: > Put some dielectric grease on the connections ;) > > > > *Joe Della Barba Coquina C 35 MK I* > > *www.dellabarba.com <http://www.dellabarba.com>* > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *General > Gao via CnC-List > *Sent:* Monday, May 18, 2020 3:41 PM > *To:* cnc-list@cnc-list.com > *Cc:* General Gao > *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 > > > > Reporting back. followed the guide and verified the transmitter had > resistance of 1787ohms, verified there was VAC output when the paddle was > turning fast (couldn't get to the 5knots as boat is on land). Decided to > sand the connectors, and put it back, tested again, and it worked...the > connectors looked without rust, a bit surprised. > > > > Thank you everyone for the kind help! > > > > Stay safe, stay healthy. > > > > Regards, > > > > Bo > > > > On Mon, May 18, 2020 at 11:42 AM General Gao > wrote: > > thank you everyone. I really appreciate the information. I will go check > and report back. > > > > Stay safe! > > > > Bo > > > > On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List < > cnc-list@cnc-list.com> wrote: > > Yup, that's correct. If there are only two wires coming from > the paddlewheel transducer, it is likely this 'generator' type as a more > modern hall effect transducer will have at least three wires (I think). > > > > Of course a broke wire or bad connection anywhere between the transducer > and the instrument will cause it all to not work. We would just pull the > transducer and connect it directly to the back of the instrument to see > what happens. > > > > From the Troubleshooting section (last page) of the pdf I linked: > > > > TROUBLESHOOTING > > > > DISPLAY READS ZERO- The problem could be either the transmitter or the > display. Please follow the proceeding steps to determine cause of the > problem- > > > > A. Measure the two wires of the transmitter with an ohm meter for > resistance value of approximately 2000 ohms (2K ohms). Do not spin the > paddlewheel. > > a. If unit is good, then check paddlewheel for any broken fins or missing > magnets. > > b. If unit is open (infinite resistance) then unit needs replacing. > > B. Measure with an AC voltmeter when the paddlewheel is spinning. You > should get approximately 1.0 VAC at about 5 knots of speed when unloaded > (not hooked up to display). > > INTERMITTENT READINGS- Keep the unit wired as normal and add an AC > voltmeter to where the input wires of the transmitter are connected. Motor > or sail as usual- > > > > A. If an AC voltage is being produced but no speed indication appears on > display, then the problem is in the display. > > B. If readings only occur when voltages are produced, then the paddlewheel > is not always turning. Clean paddlewheel first and be sure it spins freely, > and then try again. If the results are the same then paddlewheel may need > replacing. > > > > > > > > On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > > So if I understand it correctly, the theory of operation for these > generator style knot meters would simply be a 2 wire system and a voltage > developed between the two? I would expect that a simple initial test would > be for continuity between the two wires with the wheel stopped. Then spin > the wheel and check for voltage proportional to the speed of the wheel. > > > > Josh Muckley > > S/V Sea Hawk > > 1989 C 37+ > > Solomons, MD > > > > > > On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < > cnc-list@cnc-list.com> wrote: > > There are (were) some generator knotmeters. Coquina came with one when > we bought her. If memory serves, it topped out at 10 or 12 knots and it > was always fun to peg it :) > > Joe > > Coquina > > On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: > > Have you looked at this web page? This takes yo to the manuals for SR > > Mariner Instruments (since 1973): > > https://srinstruments.com/manuals#mariner_manuals > <https://protect2.fireeye.com/v1/url?k=8594dd2f-d8e74e4e-8594f458-ac1f6b44e86e-dd5873740a9ca4d3=1=efdd7465-d92c-4c80-83ec-908c6edcb26a=https%3A%2F%2Fsrinstruments.com%2Fmanuals%23mariner_manuals> > > > > The only S
Re: Stus-List speedometer - C 35 Mk2
Put some dielectric grease on the connections ;) Joe Della Barba Coquina C 35 MK I www.dellabarba.com From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Monday, May 18, 2020 3:41 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised. Thank you everyone for the kind help! Stay safe, stay healthy. Regards, Bo On Mon, May 18, 2020 at 11:42 AM General Gao mailto:general.z@gmail.com>> wrote: thank you everyone. I really appreciate the information. I will go check and report back. Stay safe! Bo On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List mailto:cnc-list@cnc-list.com>> wrote: Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think). Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens. From the Troubleshooting section (last page) of the pdf I linked: TROUBLESHOOTING DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem- A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual- A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing. On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List mailto:cnc-list@cnc-list.com>> wrote: So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List mailto:cnc-list@cnc-list.com>> wrote: There are (were) some generator knotmeters. Coquina came with one when we bought her. If memory serves, it topped out at 10 or 12 knots and it was always fun to peg it :) Joe Coquina On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: > Have you looked at this web page? This takes yo to the manuals for SR > Mariner Instruments (since 1973): > https://srinstruments.com/manuals#mariner_manuals<https://protect2.fireeye.com/v1/url?k=8594dd2f-d8e74e4e-8594f458-ac1f6b44e86e-dd5873740a9ca4d3=1=efdd7465-d92c-4c80-83ec-908c6edcb26a=https%3A%2F%2Fsrinstruments.com%2Fmanuals%23mariner_manuals> > > The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 > Mk.I 1973) was self powered. In other words, no external power was > needed (except for the backlight for the instrument face for night > use), the paddle-wheel seemed to be a generator. > > More info here: > https://srinstruments.com/r/manuals/public/MANSELF.pdf<https://protect2.fireeye.com/v1/url?k=02beb11d-5fcd227c-02be986a-ac1f6b44e86e-410501274e5fda22=1=efdd7465-d92c-4c80-83ec-908c6edcb26a=https%3A%2F%2Fsrinstruments.com%2Fr%2Fmanuals%2Fpublic%2FMANSELF.pdf> > > Ken H. > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated.
Re: Stus-List speedometer - C 35 Mk2
Reporting back. followed the guide and verified the transmitter had resistance of 1787ohms, verified there was VAC output when the paddle was turning fast (couldn't get to the 5knots as boat is on land). Decided to sand the connectors, and put it back, tested again, and it worked...the connectors looked without rust, a bit surprised. Thank you everyone for the kind help! Stay safe, stay healthy. Regards, Bo On Mon, May 18, 2020 at 11:42 AM General Gao wrote: > thank you everyone. I really appreciate the information. I will go check > and report back. > > Stay safe! > > Bo > > On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Yup, that's correct. If there are only two wires coming from >> the paddlewheel transducer, it is likely this 'generator' type as a more >> modern hall effect transducer will have at least three wires (I think). >> >> Of course a broke wire or bad connection anywhere between the transducer >> and the instrument will cause it all to not work. We would just pull the >> transducer and connect it directly to the back of the instrument to see >> what happens. >> >> From the Troubleshooting section (last page) of the pdf I linked: >> >> TROUBLESHOOTING >> >> DISPLAY READS ZERO- The problem could be either the transmitter or the >> display. Please follow the proceeding steps to determine cause of the >> problem- >> >> A. Measure the two wires of the transmitter with an ohm meter for >> resistance value of approximately 2000 ohms (2K ohms). Do not spin the >> paddlewheel. >> >> a. If unit is good, then check paddlewheel for any broken fins or missing >> magnets. >> b. If unit is open (infinite resistance) then unit needs replacing. >> >> B. Measure with an AC voltmeter when the paddlewheel is spinning. You >> should get approximately 1.0 VAC at about 5 knots of speed when unloaded >> (not hooked up to display). >> >> INTERMITTENT READINGS- Keep the unit wired as normal and add an AC >> voltmeter to where the input wires of the transmitter are connected. Motor >> or sail as usual- >> >> A. If an AC voltage is being produced but no speed indication appears on >> display, then the problem is in the display. >> B. If readings only occur when voltages are produced, then the >> paddlewheel is not always turning. Clean paddlewheel first and be sure it >> spins freely, and then try again. If the results are the same then >> paddlewheel may need replacing. >> >> >> >> >> On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> So if I understand it correctly, the theory of operation for these >>> generator style knot meters would simply be a 2 wire system and a voltage >>> developed between the two? I would expect that a simple initial test would >>> be for continuity between the two wires with the wheel stopped. Then spin >>> the wheel and check for voltage proportional to the speed of the wheel. >>> >>> Josh Muckley >>> S/V Sea Hawk >>> 1989 C 37+ >>> Solomons, MD >>> >>> >>> >>> On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < >>> cnc-list@cnc-list.com> wrote: >>> There are (were) some generator knotmeters. Coquina came with one when we bought her. If memory serves, it topped out at 10 or 12 knots and it was always fun to peg it :) Joe Coquina On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: > Have you looked at this web page? This takes yo to the manuals for SR > Mariner Instruments (since 1973): > https://srinstruments.com/manuals#mariner_manuals > > The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 > Mk.I 1973) was self powered. In other words, no external power was > needed (except for the backlight for the instrument face for night > use), the paddle-wheel seemed to be a generator. > > More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf > > Ken H. > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray ___ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> ___ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> ___ Thanks everyone for supporting this list with your contributions. Each and every
Re: Stus-List speedometer - C 35 Mk2
thank you everyone. I really appreciate the information. I will go check and report back. Stay safe! Bo On Mon, May 18, 2020 at 8:32 AM Ken Heaton via CnC-List < cnc-list@cnc-list.com> wrote: > Yup, that's correct. If there are only two wires coming from > the paddlewheel transducer, it is likely this 'generator' type as a more > modern hall effect transducer will have at least three wires (I think). > > Of course a broke wire or bad connection anywhere between the transducer > and the instrument will cause it all to not work. We would just pull the > transducer and connect it directly to the back of the instrument to see > what happens. > > From the Troubleshooting section (last page) of the pdf I linked: > > TROUBLESHOOTING > > DISPLAY READS ZERO- The problem could be either the transmitter or the > display. Please follow the proceeding steps to determine cause of the > problem- > > A. Measure the two wires of the transmitter with an ohm meter for > resistance value of approximately 2000 ohms (2K ohms). Do not spin the > paddlewheel. > > a. If unit is good, then check paddlewheel for any broken fins or missing > magnets. > b. If unit is open (infinite resistance) then unit needs replacing. > > B. Measure with an AC voltmeter when the paddlewheel is spinning. You > should get approximately 1.0 VAC at about 5 knots of speed when unloaded > (not hooked up to display). > > INTERMITTENT READINGS- Keep the unit wired as normal and add an AC > voltmeter to where the input wires of the transmitter are connected. Motor > or sail as usual- > > A. If an AC voltage is being produced but no speed indication appears on > display, then the problem is in the display. > B. If readings only occur when voltages are produced, then the paddlewheel > is not always turning. Clean paddlewheel first and be sure it spins freely, > and then try again. If the results are the same then paddlewheel may need > replacing. > > > > > On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < > cnc-list@cnc-list.com> wrote: > >> So if I understand it correctly, the theory of operation for these >> generator style knot meters would simply be a 2 wire system and a voltage >> developed between the two? I would expect that a simple initial test would >> be for continuity between the two wires with the wheel stopped. Then spin >> the wheel and check for voltage proportional to the speed of the wheel. >> >> Josh Muckley >> S/V Sea Hawk >> 1989 C 37+ >> Solomons, MD >> >> >> >> On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < >> cnc-list@cnc-list.com> wrote: >> >>> There are (were) some generator knotmeters. Coquina came with one when >>> we bought her. If memory serves, it topped out at 10 or 12 knots and it >>> was always fun to peg it :) >>> >>> Joe >>> >>> Coquina >>> >>> On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: >>> > Have you looked at this web page? This takes yo to the manuals for SR >>> > Mariner Instruments (since 1973): >>> > https://srinstruments.com/manuals#mariner_manuals >>> > >>> > The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 >>> > Mk.I 1973) was self powered. In other words, no external power was >>> > needed (except for the backlight for the instrument face for night >>> > use), the paddle-wheel seemed to be a generator. >>> > >>> > More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf >>> > >>> > Ken H. >>> > >>> >>> ___ >>> >>> Thanks everyone for supporting this list with your contributions. Each >>> and every one is greatly appreciated. If you want to support the list - >>> use PayPal to send contribution -- https://www.paypal.me/stumurray >>> >>> ___ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Yup, that's correct. If there are only two wires coming from the paddlewheel transducer, it is likely this 'generator' type as a more modern hall effect transducer will have at least three wires (I think). Of course a broke wire or bad connection anywhere between the transducer and the instrument will cause it all to not work. We would just pull the transducer and connect it directly to the back of the instrument to see what happens. >From the Troubleshooting section (last page) of the pdf I linked: TROUBLESHOOTING DISPLAY READS ZERO- The problem could be either the transmitter or the display. Please follow the proceeding steps to determine cause of the problem- A. Measure the two wires of the transmitter with an ohm meter for resistance value of approximately 2000 ohms (2K ohms). Do not spin the paddlewheel. a. If unit is good, then check paddlewheel for any broken fins or missing magnets. b. If unit is open (infinite resistance) then unit needs replacing. B. Measure with an AC voltmeter when the paddlewheel is spinning. You should get approximately 1.0 VAC at about 5 knots of speed when unloaded (not hooked up to display). INTERMITTENT READINGS- Keep the unit wired as normal and add an AC voltmeter to where the input wires of the transmitter are connected. Motor or sail as usual- A. If an AC voltage is being produced but no speed indication appears on display, then the problem is in the display. B. If readings only occur when voltages are produced, then the paddlewheel is not always turning. Clean paddlewheel first and be sure it spins freely, and then try again. If the results are the same then paddlewheel may need replacing. On Mon, 18 May 2020 at 09:18, Josh Muckley via CnC-List < cnc-list@cnc-list.com> wrote: > So if I understand it correctly, the theory of operation for these > generator style knot meters would simply be a 2 wire system and a voltage > developed between the two? I would expect that a simple initial test would > be for continuity between the two wires with the wheel stopped. Then spin > the wheel and check for voltage proportional to the speed of the wheel. > > Josh Muckley > S/V Sea Hawk > 1989 C 37+ > Solomons, MD > > > > On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < > cnc-list@cnc-list.com> wrote: > >> There are (were) some generator knotmeters. Coquina came with one when >> we bought her. If memory serves, it topped out at 10 or 12 knots and it >> was always fun to peg it :) >> >> Joe >> >> Coquina >> >> On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: >> > Have you looked at this web page? This takes yo to the manuals for SR >> > Mariner Instruments (since 1973): >> > https://srinstruments.com/manuals#mariner_manuals >> > >> > The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 >> > Mk.I 1973) was self powered. In other words, no external power was >> > needed (except for the backlight for the instrument face for night >> > use), the paddle-wheel seemed to be a generator. >> > >> > More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf >> > >> > Ken H. >> > >> >> ___ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
So if I understand it correctly, the theory of operation for these generator style knot meters would simply be a 2 wire system and a voltage developed between the two? I would expect that a simple initial test would be for continuity between the two wires with the wheel stopped. Then spin the wheel and check for voltage proportional to the speed of the wheel. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, May 18, 2020, 07:38 Joe Della Barba via CnC-List < cnc-list@cnc-list.com> wrote: > There are (were) some generator knotmeters. Coquina came with one when > we bought her. If memory serves, it topped out at 10 or 12 knots and it > was always fun to peg it :) > > Joe > > Coquina > > On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: > > Have you looked at this web page? This takes yo to the manuals for SR > > Mariner Instruments (since 1973): > > https://srinstruments.com/manuals#mariner_manuals > > > > The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 > > Mk.I 1973) was self powered. In other words, no external power was > > needed (except for the backlight for the instrument face for night > > use), the paddle-wheel seemed to be a generator. > > > > More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf > > > > Ken H. > > > > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
There are (were) some generator knotmeters. Coquina came with one when we bought her. If memory serves, it topped out at 10 or 12 knots and it was always fun to peg it :) Joe Coquina On 5/18/2020 5:32 AM, Ken Heaton via CnC-List wrote: Have you looked at this web page? This takes yo to the manuals for SR Mariner Instruments (since 1973): https://srinstruments.com/manuals#mariner_manuals The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 Mk.I 1973) was self powered. In other words, no external power was needed (except for the backlight for the instrument face for night use), the paddle-wheel seemed to be a generator. More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf Ken H. ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Have you looked at this web page? This takes yo to the manuals for SR Mariner Instruments (since 1973): https://srinstruments.com/manuals#mariner_manuals The only SR Mariner Knotmeter I ever worked on (on a friend's C 35 Mk.I 1973) was self powered. In other words, no external power was needed (except for the backlight for the instrument face for night use), the paddle-wheel seemed to be a generator. More info here: https://srinstruments.com/r/manuals/public/MANSELF.pdf Ken H. On Sun, 17 May 2020 at 21:19, General Gao via CnC-List < cnc-list@cnc-list.com> wrote: > Hi, I am coming back to the issue here. Tried to clean the paddle, the > paddle looked pretty straight forward and rotates freely. The back of my > speedometer has a name called "SR Instruments", no model name, which > surprised me. > > Is there a way to diagnose the electronics? Just wanted to give it a try > before biting the bullet. > > Thank you in advance. > > Bo > > > On Mon, Apr 13, 2020 at 8:58 AM Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Pitot tube knotmeters are found on fast powerboats and airplanes. They >> don’t really work much below 10 knots and in both cases the tubes can get >> plugged with bugs or seaweed. >> >> It took me literally years to find spares for my ancient S-H knotmeter >> that has been out of production since the 1980s. The paddle wheel gets >> clogged so easily I never leave it in anymore if not using it. >> >> >> >> *Joe Della Barba Coquina C 35 MK I* >> >> *www.dellabarba.com <http://www.dellabarba.com>* >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *John >> and Maryann Read via CnC-List >> *Sent:* Monday, April 13, 2020 7:49 AM >> *To:* cnc-list@cnc-list.com >> *Cc:* John and Maryann Read >> *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 >> >> >> >> Have had similar issues with my prior unit – Standard Horizon model 150 >> which went out of production some 15 years ago and parts are hard to come >> by and only on flea bay. >> >> What brand and model is your speedometer? >> >> No – no tubes per se. Yours is all electric. The paddle wheel has a >> small magnet in one of the blades. As it rotates, the electric pulse is >> picked up by the transducer creating an electrical pulse which is >> transmitted via the wire to your bulkhead gauge. The faster the wheel >> turns the pulse increases and your gauge registers greater speed. >> >> >> >> Vast majority of issues are caused by growth around the blades, the blade >> shaft or water facing of the transducer. Ensure this is absolutely clean >> and blades turn freely. Normally requires cleaning several times each >> season. If this is good, then your transducer may be worn out / faulty. >> Virtually all are made by Airmar and their web site has an excellent cross >> reference of your unit to their current part number. This will require re >> running the wire to your gauge which is often PITA and involves boat yoga. >> In my case this fixed the problem. >> >> >> >> When I had problem with other units of my instruments and parts were >> nowhere to be found, Santa was very nice and provided a new suite with all >> the latest whiz bang features >> >> >> >> Best of luck >> >> >> >> John and Maryann >> >> Legacy III >> >> 1982 C 34 >> >> Noank, CT >> >> >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com >> ] *On Behalf Of *General Gao via CnC-List >> *Sent:* Sunday, April 12, 2020 9:18 PM >> *To:* cnc-list@cnc-list.com >> *Cc:* General Gao >> *Subject:* Stus-List speedometer - C 35 Mk2 >> >> >> >> My speedometer was not behaving well last season. I am planning to fix it >> myself. Googled the keyword, it came up a few documents suggesting blowing >> the tube to clear clog. I looked at my gauge and where there sensor is, I >> don't seem to find a tube there. Please see the pictures attached in the >> link. Could someone help me with the diagnostics? Thank you in advance. >> >> >> >> https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P >> <https://protect2.fireeye.com/v1/url?k=837e7d76-dfe835d6-837e5401-0cc47adca788-b178bd7dca34f18d=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P> >> >> &g
Re: Stus-List speedometer - C 35 Mk2
I think what Joe is saying is that you have most likely been mislead into thinking that you have any "tubes" that may clog. I would agree with that assessment. From the pictures, it appears that you have a relatively normal paddle wheel style marine knot meter. The way I believe these typically work is with a hall-effect switch. It's kinda like a solid state (digital) reed switch. There is a small magnet in the paddle wheel and each turn trips the switch. A square wave pulse is generated and sent to the brain box. The brain converts the frequency of the pulses into a speed through the water. https://youtu.be/wpAA3qeOYiI You can pretty well confirm this by following the output cable to the terminal board in the brain box. Depending on the design you will have 3 or 4 terminations. I would expect 3. One will be some level of positive voltage (VCC). One will be a reference ground (GND). And the final one will be your signal. If you can use a volt meter to find VCC and GND then that leaves the last one to be the output signal (SIG). With an oscilloscope you can test the output signal in reference to the ground and then spin the paddle wheel to see a square wave on the scope screen. Typically I would expect the pulse to be 0 to +5v but who knows. At the very least I would expect it to be 0v to +VCC. Move through those identification steps and see if you can confirm my suspicions about the design. You might simply find that there is a continuity problem - Loose terminal, broken solder joint, corrosion. With the wires removed from the terminal board you should probably read at least 5v between VCC and GND. Maybe less but still probably not less than 1v. If power is bad then you are not likely to be able to fix the control head (brain box) but should at least shift your attention there. If the power is good then start looking for a signal. Again probably not going to be able to fix the paddle wheel portion but at least shift your attention to the wiring. The point where it exits the paddle wheel unit tends to get a hard flex which can break the conductors inside the insulating jacket. While looking for a signal, move and flex the wire in that area. You may get an inconsistent connection which would momentarily show as speed on the display or as a square wave on the oscilloscope. Let us know what you find. Josh Muckley S/V Sea Hawk 1989 C 37+ Solomons, MD On Mon, Apr 13, 2020, 08:58 Della Barba, Joe via CnC-List < cnc-list@cnc-list.com> wrote: > Pitot tube knotmeters are found on fast powerboats and airplanes. They > don’t really work much below 10 knots and in both cases the tubes can get > plugged with bugs or seaweed. > > It took me literally years to find spares for my ancient S-H knotmeter > that has been out of production since the 1980s. The paddle wheel gets > clogged so easily I never leave it in anymore if not using it. > > > > *Joe Della Barba Coquina C 35 MK I* > > *www.dellabarba.com <http://www.dellabarba.com>* > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *John > and Maryann Read via CnC-List > *Sent:* Monday, April 13, 2020 7:49 AM > *To:* cnc-list@cnc-list.com > *Cc:* John and Maryann Read > *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 > > > > Have had similar issues with my prior unit – Standard Horizon model 150 > which went out of production some 15 years ago and parts are hard to come > by and only on flea bay. > > What brand and model is your speedometer? > > No – no tubes per se. Yours is all electric. The paddle wheel has a > small magnet in one of the blades. As it rotates, the electric pulse is > picked up by the transducer creating an electrical pulse which is > transmitted via the wire to your bulkhead gauge. The faster the wheel > turns the pulse increases and your gauge registers greater speed. > > > > Vast majority of issues are caused by growth around the blades, the blade > shaft or water facing of the transducer. Ensure this is absolutely clean > and blades turn freely. Normally requires cleaning several times each > season. If this is good, then your transducer may be worn out / faulty. > Virtually all are made by Airmar and their web site has an excellent cross > reference of your unit to their current part number. This will require re > running the wire to your gauge which is often PITA and involves boat yoga. > In my case this fixed the problem. > > > > When I had problem with other units of my instruments and parts were > nowhere to be found, Santa was very nice and provided a new suite with all > the latest whiz bang features > > > > Best of luck > > > > John and Maryann > > Legacy III > > 1982 C 34 > > Noank, CT > > > > > > &
Re: Stus-List speedometer - C 35 Mk2
My bad, the model name is KM5A. Still cannot find any guide on the web... Bo On Sun, May 17, 2020 at 8:18 PM General Gao wrote: > Hi, I am coming back to the issue here. Tried to clean the paddle, the > paddle looked pretty straight forward and rotates freely. The back of my > speedometer has a name called "SR Instruments", no model name, which > surprised me. > > Is there a way to diagnose the electronics? Just wanted to give it a try > before biting the bullet. > > Thank you in advance. > > Bo > > > On Mon, Apr 13, 2020 at 8:58 AM Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Pitot tube knotmeters are found on fast powerboats and airplanes. They >> don’t really work much below 10 knots and in both cases the tubes can get >> plugged with bugs or seaweed. >> >> It took me literally years to find spares for my ancient S-H knotmeter >> that has been out of production since the 1980s. The paddle wheel gets >> clogged so easily I never leave it in anymore if not using it. >> >> >> >> *Joe Della Barba Coquina C 35 MK I* >> >> *www.dellabarba.com <http://www.dellabarba.com>* >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *John >> and Maryann Read via CnC-List >> *Sent:* Monday, April 13, 2020 7:49 AM >> *To:* cnc-list@cnc-list.com >> *Cc:* John and Maryann Read >> *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 >> >> >> >> Have had similar issues with my prior unit – Standard Horizon model 150 >> which went out of production some 15 years ago and parts are hard to come >> by and only on flea bay. >> >> What brand and model is your speedometer? >> >> No – no tubes per se. Yours is all electric. The paddle wheel has a >> small magnet in one of the blades. As it rotates, the electric pulse is >> picked up by the transducer creating an electrical pulse which is >> transmitted via the wire to your bulkhead gauge. The faster the wheel >> turns the pulse increases and your gauge registers greater speed. >> >> >> >> Vast majority of issues are caused by growth around the blades, the blade >> shaft or water facing of the transducer. Ensure this is absolutely clean >> and blades turn freely. Normally requires cleaning several times each >> season. If this is good, then your transducer may be worn out / faulty. >> Virtually all are made by Airmar and their web site has an excellent cross >> reference of your unit to their current part number. This will require re >> running the wire to your gauge which is often PITA and involves boat yoga. >> In my case this fixed the problem. >> >> >> >> When I had problem with other units of my instruments and parts were >> nowhere to be found, Santa was very nice and provided a new suite with all >> the latest whiz bang features >> >> >> >> Best of luck >> >> >> >> John and Maryann >> >> Legacy III >> >> 1982 C 34 >> >> Noank, CT >> >> >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com >> ] *On Behalf Of *General Gao via CnC-List >> *Sent:* Sunday, April 12, 2020 9:18 PM >> *To:* cnc-list@cnc-list.com >> *Cc:* General Gao >> *Subject:* Stus-List speedometer - C 35 Mk2 >> >> >> >> My speedometer was not behaving well last season. I am planning to fix it >> myself. Googled the keyword, it came up a few documents suggesting blowing >> the tube to clear clog. I looked at my gauge and where there sensor is, I >> don't seem to find a tube there. Please see the pictures attached in the >> link. Could someone help me with the diagnostics? Thank you in advance. >> >> >> >> https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P >> <https://protect2.fireeye.com/v1/url?k=837e7d76-dfe835d6-837e5401-0cc47adca788-b178bd7dca34f18d=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P> >> >> >> >> https://drive.google.com/open?id=1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY >> <https://protect2.fireeye.com/v1/url?k=8f8e2f51-d31867f1-8f8e0626-0cc47adca788-77686a1316f3f8b1=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY> >> ___ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Hi, I am coming back to the issue here. Tried to clean the paddle, the paddle looked pretty straight forward and rotates freely. The back of my speedometer has a name called "SR Instruments", no model name, which surprised me. Is there a way to diagnose the electronics? Just wanted to give it a try before biting the bullet. Thank you in advance. Bo On Mon, Apr 13, 2020 at 8:58 AM Della Barba, Joe via CnC-List < cnc-list@cnc-list.com> wrote: > Pitot tube knotmeters are found on fast powerboats and airplanes. They > don’t really work much below 10 knots and in both cases the tubes can get > plugged with bugs or seaweed. > > It took me literally years to find spares for my ancient S-H knotmeter > that has been out of production since the 1980s. The paddle wheel gets > clogged so easily I never leave it in anymore if not using it. > > > > *Joe Della Barba Coquina C 35 MK I* > > *www.dellabarba.com <http://www.dellabarba.com>* > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *John > and Maryann Read via CnC-List > *Sent:* Monday, April 13, 2020 7:49 AM > *To:* cnc-list@cnc-list.com > *Cc:* John and Maryann Read > *Subject:* [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 > > > > Have had similar issues with my prior unit – Standard Horizon model 150 > which went out of production some 15 years ago and parts are hard to come > by and only on flea bay. > > What brand and model is your speedometer? > > No – no tubes per se. Yours is all electric. The paddle wheel has a > small magnet in one of the blades. As it rotates, the electric pulse is > picked up by the transducer creating an electrical pulse which is > transmitted via the wire to your bulkhead gauge. The faster the wheel > turns the pulse increases and your gauge registers greater speed. > > > > Vast majority of issues are caused by growth around the blades, the blade > shaft or water facing of the transducer. Ensure this is absolutely clean > and blades turn freely. Normally requires cleaning several times each > season. If this is good, then your transducer may be worn out / faulty. > Virtually all are made by Airmar and their web site has an excellent cross > reference of your unit to their current part number. This will require re > running the wire to your gauge which is often PITA and involves boat yoga. > In my case this fixed the problem. > > > > When I had problem with other units of my instruments and parts were > nowhere to be found, Santa was very nice and provided a new suite with all > the latest whiz bang features > > > > Best of luck > > > > John and Maryann > > Legacy III > > 1982 C 34 > > Noank, CT > > > > > > > > > > *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com > ] *On Behalf Of *General Gao via CnC-List > *Sent:* Sunday, April 12, 2020 9:18 PM > *To:* cnc-list@cnc-list.com > *Cc:* General Gao > *Subject:* Stus-List speedometer - C 35 Mk2 > > > > My speedometer was not behaving well last season. I am planning to fix it > myself. Googled the keyword, it came up a few documents suggesting blowing > the tube to clear clog. I looked at my gauge and where there sensor is, I > don't seem to find a tube there. Please see the pictures attached in the > link. Could someone help me with the diagnostics? Thank you in advance. > > > > https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P > <https://protect2.fireeye.com/v1/url?k=837e7d76-dfe835d6-837e5401-0cc47adca788-b178bd7dca34f18d=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P> > > > > https://drive.google.com/open?id=1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY > <https://protect2.fireeye.com/v1/url?k=8f8e2f51-d31867f1-8f8e0626-0cc47adca788-77686a1316f3f8b1=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY> > ___ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > > ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Pitot tube knotmeters are found on fast powerboats and airplanes. They don’t really work much below 10 knots and in both cases the tubes can get plugged with bugs or seaweed. It took me literally years to find spares for my ancient S-H knotmeter that has been out of production since the 1980s. The paddle wheel gets clogged so easily I never leave it in anymore if not using it. Joe Della Barba Coquina C 35 MK I www.dellabarba.com From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of John and Maryann Read via CnC-List Sent: Monday, April 13, 2020 7:49 AM To: cnc-list@cnc-list.com Cc: John and Maryann Read Subject: [EXTERNAL] Re: Stus-List speedometer - C 35 Mk2 Have had similar issues with my prior unit – Standard Horizon model 150 which went out of production some 15 years ago and parts are hard to come by and only on flea bay. What brand and model is your speedometer? No – no tubes per se. Yours is all electric. The paddle wheel has a small magnet in one of the blades. As it rotates, the electric pulse is picked up by the transducer creating an electrical pulse which is transmitted via the wire to your bulkhead gauge. The faster the wheel turns the pulse increases and your gauge registers greater speed. Vast majority of issues are caused by growth around the blades, the blade shaft or water facing of the transducer. Ensure this is absolutely clean and blades turn freely. Normally requires cleaning several times each season. If this is good, then your transducer may be worn out / faulty. Virtually all are made by Airmar and their web site has an excellent cross reference of your unit to their current part number. This will require re running the wire to your gauge which is often PITA and involves boat yoga. In my case this fixed the problem. When I had problem with other units of my instruments and parts were nowhere to be found, Santa was very nice and provided a new suite with all the latest whiz bang features Best of luck John and Maryann Legacy III 1982 C 34 Noank, CT From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Sunday, April 12, 2020 9:18 PM To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: General Gao Subject: Stus-List speedometer - C 35 Mk2 My speedometer was not behaving well last season. I am planning to fix it myself. Googled the keyword, it came up a few documents suggesting blowing the tube to clear clog. I looked at my gauge and where there sensor is, I don't seem to find a tube there. Please see the pictures attached in the link. Could someone help me with the diagnostics? Thank you in advance. https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P<https://protect2.fireeye.com/v1/url?k=837e7d76-dfe835d6-837e5401-0cc47adca788-b178bd7dca34f18d=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P> https://drive.google.com/open?id=1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY<https://protect2.fireeye.com/v1/url?k=8f8e2f51-d31867f1-8f8e0626-0cc47adca788-77686a1316f3f8b1=1=756d065d-3ce3-4c05-a863-e82db01be882=https%3A%2F%2Fdrive.google.com%2Fopen%3Fid%3D1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY> ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Re: Stus-List speedometer - C 35 Mk2
Have had similar issues with my prior unit – Standard Horizon model 150 which went out of production some 15 years ago and parts are hard to come by and only on flea bay. What brand and model is your speedometer? No – no tubes per se. Yours is all electric. The paddle wheel has a small magnet in one of the blades. As it rotates, the electric pulse is picked up by the transducer creating an electrical pulse which is transmitted via the wire to your bulkhead gauge. The faster the wheel turns the pulse increases and your gauge registers greater speed. Vast majority of issues are caused by growth around the blades, the blade shaft or water facing of the transducer. Ensure this is absolutely clean and blades turn freely. Normally requires cleaning several times each season. If this is good, then your transducer may be worn out / faulty. Virtually all are made by Airmar and their web site has an excellent cross reference of your unit to their current part number. This will require re running the wire to your gauge which is often PITA and involves boat yoga. In my case this fixed the problem. When I had problem with other units of my instruments and parts were nowhere to be found, Santa was very nice and provided a new suite with all the latest whiz bang features Best of luck John and Maryann Legacy III 1982 C 34 Noank, CT From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of General Gao via CnC-List Sent: Sunday, April 12, 2020 9:18 PM To: cnc-list@cnc-list.com Cc: General Gao Subject: Stus-List speedometer - C 35 Mk2 My speedometer was not behaving well last season. I am planning to fix it myself. Googled the keyword, it came up a few documents suggesting blowing the tube to clear clog. I looked at my gauge and where there sensor is, I don't seem to find a tube there. Please see the pictures attached in the link. Could someone help me with the diagnostics? Thank you in advance. https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P https://drive.google.com/open?id=1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
Stus-List speedometer - C 35 Mk2
My speedometer was not behaving well last season. I am planning to fix it myself. Googled the keyword, it came up a few documents suggesting blowing the tube to clear clog. I looked at my gauge and where there sensor is, I don't seem to find a tube there. Please see the pictures attached in the link. Could someone help me with the diagnostics? Thank you in advance. https://drive.google.com/open?id=1nYSpxnzb1BImby5jz3ASLnSD3OYxKT3P https://drive.google.com/open?id=1bBgw-Ln_wr2Qae-GUCk3L_I_dAQO-ekY ___ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
