Motorola 9RH7013 On Sun, Sep 3, 2023 at 11:09 PM Kristin Nowell <kristinnow...@gmail.com> wrote:
> thanks Ian, > i have an h36, s.n.3506, with a motorola solid state voltage regulator. > wiggled my spade connectors (field, relay, battery positive) this morning > and saw no reading above 14.6 v. during todays' flight. Bought a > replacement as insurance if my unit misbehaves again. Twenty US dollars. > So maybe it was my Davtron voltmeter/oat sensor giving a spurious result > (?). Dunno, but I'll take a spanner to hand tomorrow, loosen the unit, and > clean the connection to ground . > You are a rare and precious individual in your grasp of electronics - I > wish you were here... wait, sorry, I wouldn't wish that on any good soul.🙂 > Cheers > > On Sun, Sep 3, 2023 at 10:09 PM Ian Mc Phee <mrsoar...@gmail.com> wrote: > >> Assume you have h36 with Limbach and not HK36 with rotax. >> >> 50 yrs, ago kiwis would insulate their say BOSCH RE55 regulator and have >> a, small resistor between the frame of car and regulator and this, was for >> cold winter months as then batteries could take more charge when cold. The >> kiwi would have a summer switch which would earth out regulator and thus >> more normal voltages. >> >> Thus maybe your present regulator is not grounding out on frame correctly >> (resistive) or if old black box bin it. >> >> Remember your oil pressure switch and a relay controls the field winding. >> >> The replacement RE55 is bullet proof but remember to the connections >> right and in form of a T which is readily available connector from >> electrical/motor shop. Battery and field must be correct. A friend changed >> an old falke Limbach from original mechanical R55 to RE55 and got >> connections wrong and destroyed the regulator. >> >> If you have a HK36 then it may have a, ducatti regulator which is not >> much better than a bridge recterfier. They can heat up and go over voltage. >> There are after market ones much better. A quality rectifier keeps bolts >> between 13.8 V and 14.2 and then battery will last 5+years. Crook regulator >> 2 years if you are lucky. >> >> Have a read of Rotax regulator on the net. >> >> Ian McPhee >> 0428847642 >> >> On Sun, 3 Sep. 2023, 10:25 am Tom Preisser, <t...@ecoflight.com> wrote: >> >>> While flying today I noticed that my voltage would go up from the normal >>> 14.3 to 14.6 volts to an occasional 15.3 volts. I am wondering if >>> anyone has any ideas or opinions as to what I should be looking for ? Loose >>> connectors ? Overheating ? Replacement types ? >>> What will happen if the regulator fails in flight ? Fire ? Avionics ? >>> >>> Thanks in advance for ANY advice, >>> Slacko >>> >>
