Cruisers Forum

  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
Thread Tools Search this Thread Rate Thread Display Modes
Old 11-02-2020, 20:25   #1
Registered User
Connemara's Avatar

Join Date: Oct 2006
Location: Toronto, Canada
Boat: Mirage 27 in Toronto; Wright 10 in Auckland
Posts: 745
Images: 2
ST 50 wind transducer

Anybody know where I might find a wind transducer for my Raymarine Autohelm ST50 system? Freak windstorm smashed the instrument and I'm trying to avoid upgrading if possible.

Connemara is offline   Reply With Quote
Old 12-02-2020, 05:26   #2
Senior Cruiser
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 38,342
Images: 241
Re: ST 50 wind transducer


Raymarine ST50 Masthead Wind Transducer Service Kit
Includes Replacement Wind Vane with Balance Weight and Cup Assembly
Fits ST50 and Early-Style ST60 Masthead Wind Transducers
Formerly Raymarine Part Number D139

Replacing ST50 or ST50+ masthead Transducer
The original masthead wind transducer used by the ST50 range has not been available for many years, it's part number was D168 and was identified by the vertical tube at the outboard end and the angular 'squarish' style cups.

The current masthead transducer, R28170, is identified by the 'egg' shaped body and the hemispherical cups for the anemometer. The R28170 is contained within the E22078 pack, which also contains a new 30m cable and masthead mounting block.

The two masthead units are operationally the same, and both use the same type of 5 pin plug and socket at the top of the mast, however the early masthead transducers did not have a key on the plug to locate the pins correctly in the mounting block sockets which could lead to bent or damaged pins if carelessly inserted.

The later style masthead transducers had a moulded key on the plug and a keyway cut in the socket to ensure the plug and socket were correctly aligned before the securing nut was tightened and so ensured no damage was done to the pins.

It is possible to remove the key to allow later masthead transducers to be fitted to early style mounting blocks, but this is not recommended since it risks damage to the pins; we would recommend replacing the masthead cable and mounting block at the same time as fitting the new masthead transducer

We would point out that the hemispherical cups are more efficient and will rotate faster than the older angular cups, giving a wind speed over reading of 30%. The later ST60 and ST60+ instruments have a wind speed calibration and so this over-reading can be corrected out. The ST50 and ST50+ displays did not have a wind speed correction and so they will over-read the wind speed by 30%.
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is online now   Reply With Quote
Old 12-02-2020, 12:44   #3
Registered User
Connemara's Avatar

Join Date: Oct 2006
Location: Toronto, Canada
Boat: Mirage 27 in Toronto; Wright 10 in Auckland
Posts: 745
Images: 2
Re: ST 50 wind transducer

Gord, thanks for this. Didn't look at Defender. Their kit might be a solution. depending on what's actually left at the masthead; I haven't been up to look. I did go on eBay briefly but didn't seen anything. It was just cursory, however.

No hurry. It's for the antipodean boat and we're returning to Toronto in a month. I'll continue the search over the winter (New Zealand winter) and with luck have something in hand by the time we return here in December.

Connemara is offline   Reply With Quote

transducer, wind

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
2" Transducer through-hulls: are they transducer-specific? jholovacs Construction, Maintenance & Refit 7 23-03-2019 09:23
[SOLD] 3 wind generators and pole for sale or trade for raymarine wind transducer. amytom General Classifieds (no boats) 4 01-08-2018 14:44
Wind transducer: True vs. apparent wind? RhythmDoctor OpenCPN 3 04-01-2015 15:28
A Transducer is a Transducer, Correct? Herbseesmoore Marine Electronics 3 22-06-2013 05:23
Want To Buy: Raymarine Rotary Rudder Transducer and Fluxgate Transducer Kristian Classifieds Archive 0 22-02-2010 04:09

Advertise Here

All times are GMT -7. The time now is 03:41.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.