• Announcements

    • Zapata

      Abbreviated rules   07/28/2017

      Underdawg did an excellent job of explaining the rules.  Here's the simplified version: Don't insinuate Pedo.  Warning and or timeout for a first offense.  PermaFlick for any subsequent offenses Don't out members.  See above for penalties.  Caveat:  if you have ever used your own real name or personal information here on the forums since, like, ever - it doesn't count and you are fair game. If you see spam posts, report it to the mods.  We do not hang out in every thread 24/7 If you see any of the above, report it to the mods by hitting the Report button in the offending post.   We do not take action for foul language, off-subject content, or abusive behavior unless it escalates to persistent stalking.  There may be times that we might warn someone or flick someone for something particularly egregious.  There is no standard, we will know it when we see it.  If you continually report things that do not fall into rules #1 or 2 above, you may very well get a timeout yourself for annoying the Mods with repeated whining.  Use your best judgement. Warnings, timeouts, suspensions and flicks are arbitrary and capricious.  Deal with it.  Welcome to anarchy.   If you are a newbie, there are unwritten rules to adhere to.  They will be explained to you soon enough.  


  • Content count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About jerryj2me

  • Rank

Recent Profile Visitors

14,695 profile views
  1. Small Guage WIre Boots for Yanmar Sensors.

    Slip heatshrink tubing over the whole thing and use a heat gun to shrink in place over the sensor to the wire.
  2. God I hate it when somebody asserts themselves as an authority and doesn't know WTF they are talking about. The original GSM systems (the old ones) have a dynamic range of 91 dB http://www.analog.com/en/analog-dialogue/articles/wideband-radios-need-wide-dynamic-range-converters.html Read the above if you don't believe me. Also if you read the below, you will see illustrated that on a good day you can get to 115 dB of dynamic range: http://www.radio-electronics.com/info/receivers/dynamic_range/dynamic_range.php Which is why in my prior post I sort of handwaved and called it over a 100dB. Depending on which cellular standard we are talking about they range from 91 to IIRC 106dB. As well, if you think that you are just connecting up an 6-8 bit ADC to the damned antenna, you have obviously never designed a cell phone receiver in your life. Considering my last 2 boats were largely paid for from contracts working for Motorola, Broadcom and Qualcomm I got a different story to tell. Rant off...
  3. Dinghy spinnaker chute bag.

    If a local sail loft won't do it for you, toss it at a remote loft to make, or even find someone on Etsy to do a custom build for you. Define and design yourself, and if fabrication isn't your thing throw the sketch at the right people. Give them an old sail bag from a bigger boat to steal the materials from in the way of cloth. Any canvas shop should be able to fabricate.
  4. 20km? It's possible but won't be a slam dunk. The frequencies are all line of sight. (800MHz to 3GHz) and the visible horizon is 6 miles (9-10 km) out standing on the shore. Higher towers will extend that distance somewhat. http://www.ringbell.co.uk/info/hdist.htm With the above you can take a 100 foot tower and hit 12.3 miles out, which is 19-20 km. A weak signal however may have issues, but cell phones have some impressive dynamic range with the capability to take signals successfully with over 100dB of dynamic range. (really weak to very strong if you ditch the geek speak) YMMV
  5. engine starter troubles

    Start by measuring all your voltages from the ground post of the battery. Find out what ground voltage is at the engine when cranking or trying to crank. If that pops up to more than 0.5 volts you got a crappy ground from the battery. After you fix your ground side, try it again at the battery feed to the solenoid (stick with that ground post on the battery) That should be 12V-14V without trying to crank, and be 10V or better when cranking. (numbers may vary) After fixing the battery to solenoid side, see if the starter side of the solenoid has a similar set of voltages as the battery side. When cranking they should be less than 0.2V difference. (preferably less)
  6. Batt Water Unequal

    Good article for sure. The one thing I would add to the article is the importance of properly building the cables and their connector crimps. Buy a hydraulic crimping tool ($30 on EBay), use the right size crimps for the wire, and be careful in making the crimps properly. I just redid a classic car and the prior owner had done all the high amp cables crimps by smashing with vice grips.
  7. Is this bad?

    Do her a favor and substitute a diesel in for the A4. Hell, it's your daughter and nobody has to explain the safety and reliability advantage of the diesel. http://www.betamarinenw.com/Applications/atomicfour.html More work to convert but it's not a killer.
  8. Maker Space/DIY Boat Repairs?

    Down here in San Diego: http://makerplace.com/ Full end to end wood and metal shop, 3D printers, CNC cutter machines CNC laser cutter tables, a professional paint booth, and a whole lot more. Costs me $170 month as a member, and it works well for those people who don't have a huge garage space for a shop.
  9. Batteries losing water at an alarming rate

    Due to running the batteries dry, I would say that the batteries are now destroyed. Reading the specification on that battery charger did not impress me. When you replace the batteries I would suggest getting a better charger as well. I suspect that the charger did not properly transfer to a float-maintain profile and thus boiled the electrolyte off in the batteries.
  10. Hoping to crew - San Diego/October

    See FB listing for crew pool below.
  11. Got over a thousand sailors on the FB page now. Link below.
  12. Portable ouboard fuel tank as an emergency diesel tank

    Having gone dead in the water due to a clogged fuel filter, one of the things I installed on my prior boat was a parallel double filter filter system. One fuel filter clogs, flip the valve and you are going through the other filter. Two filters, one diverter valve, easy peasy...
  13. One more time - Take a look at whats there. You got magnetic latched valves there that run at very low power.
  14. How to remove First 40.7 Rudder

    While you have it out suggest getting new rudder bearings installed. Both 40.7 and 36.7 have a reputation for bad rudder bearings. http://www.jefa.com/rudder.htm they can fix you up with the parts