| Title: | SAILING |
| Notice: | Please read Note 2.* before participating in this conference |
| Moderator: | UNIFIX::BERENS |
| Created: | Wed Jul 01 1992 |
| Last Modified: | Mon Jun 02 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2299 |
| Total number of notes: | 20724 |
I lost the mast head sending unit for my Ray Jefferson WS-60/WD-30
wind instruments in hurricane Hugo last October in St. Criox. The
cable and instruments are still in good shape, but the sender is gone.
I called Ray-Jefferson and they told me that they no longer make the
system and that they no longer have any sending units in stock. They
also said they didn't know of any other comnpatible masthead units
that would work.
What I need is some ideas as to how I might figure out what other
wind instrument senders could be compatible. I have a rough schematic
for the system, but details (e.g.; voltage levels, impedance, etc) are
not on it, just connections.
Anyone have any ideas?? I probably need to figure the impedance of
the circuits to ensure that the guages don't read totally bizarre.
I really don't want to; Buy a whole new set, or fill the holes left
from the guages.
All advice gratefully accepted.
Thanks,
Jeff G.
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 1567.1 | AC or DC signals? | JOVIAN::WAGNER | Wed Aug 01 1990 14:50 | 27 | |
Darn good question. Don't you love how certain manufacturers
spend a lot more on ensuring incompatibility with the
competition than supporting their own products? Grrrr.
Well anyway, asked a friend who was buzzing his wind speed
meter, and it was sending what looked like TTL level pulses.
Maybe optoelectronics and a slotted wheel? Bets way to find
that out would be to plunk a scope probe on someone else's
working unit...
Since you've got the schematic, tho, Zin should'nt be too
critical... if it's not apparent, and you're sure it's a DC
signal, you could start with a D-cell and a handfull of
resistors; form a divider (starting small) and check the
unloaded vs. loaded levels...
Or wait a day or two till a present owner types something in
here!!
PS as for me, is there a wind machine around that's worth
having, for less than $800?
Good Luck!
Scott.
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| 1567.2 | Once again, call Marine Exchange! | AKOV11::DJOHNSTON | Wed Aug 01 1990 16:13 | 9 | |
Our masthead unit on Fat Tuesday was wrecked by a yard crew. Our
instruments were Ockam, but the replacement was a Kenyon masthead unit.
No problem with compatibility. It is alsmost certain that your system
is DC. I'd check the plug ( if it remains ) and find a masthead unit
with a matching plug. I don't think it's all that tough to find a
working match. Call the Marine Exchange in Peabody, Mass for their
opinion. They can ship one to you.
Dave
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| 1567.3 | MSCSSE::BERENS | Alan Berens | Wed Aug 01 1990 16:36 | 6 | |
Well, to further confuse things ..... my Signet windspeed (no wind direction) masthead transducer is a small AC generator. The AC output voltage, which is proportional to windspeed, is rectified inside the instrument and used to drive a DC analog meter. Simple technology at an appallingly high price. Replacement transducer is $120 or so if I remember correctly. | |||||