The serial numbers being forwarded. From what normally occurs is the failure transceiver 'group' usually will coincide with a production run of a specific device's supplier of the failing component or components ..... That is why I am interested in the specific FT991 serials - to see if this is occurring . As we all should know is that sometimes a failed RF output fet / transistor can effect a rig's overall failure ( i.e - from just no RF output to a absolutely 'dead' rig due to a blown circuit trace from a transistor's shorting out ) Anyway , thanks again for taking the time to send out the serial numbers !
The list of serial numbers I have is:
Serial No. S/N:
4M020150 Nov 2014
4MN020430 Nov 2014
4N020473 Dec 2014
4N020461 Dec 2014
5E50011 Mar 2015
5C030022 Jan 2015
5C030067 Jan 2015
5C021122 Jan 2015
5C030021 Jan 2015
5D030216 Feb 2015
5E050178 Mar 2015
5F070468 Apr 2015
5F070389 Jun 2015
5G080451 July 2015
5G080467 JUL 2015
5G080506 JUL 2015
5F070389 Jun 2015
5G080451 July 2015
5G080467 JUL 2015
5G080506 JUL 2015
5I150370 July 2015
There have been thousands of FT991's sold, so the chance of getting a bad one would seem to be very small. Of course as usual the people with good rigs are quietly happy (like me) and the the people with dead rigs quite rightly complain, so that's what we hear. It doesn't necessarily mean the FT991 is any worse than any other model or brand.
DATABASE....
Yaesu FT-991 frequency of failures
Yaesu FT-991(A) Users Group (groups.io)
https://groups.io/g/Yaesu-FT-991
I have one in service here with serial number: S/N: 5I160122
ReplyDeleteRegards,
Adrian YO3HJV
Could you please share where the database is . I have not seen anything yet from a VK about this . I am guessing that you will not share the transceiver serial numbers , which could help in determining if there is a correlation between failure prone units or not (especially used FT991 transceivers )
ReplyDeleteMine is 4N020551 delivered in Feb 2015
ReplyDeleteNo issues so far but fortunately Radioworld gives a 2 year warranty in new HF rigs.
A little peace of mind.
Dave
VE3OSY
Serial No. 5J170263
ReplyDeletePurchased Dec. 1, 2015 from Universl Radio
Perfect so far into OCFDs with CMC tamed by Guanella baluns and Maxwell chokes.
73,Kent K9ZTV
· Mine has been fine , coming up on its one year anniversary, that also means out of warranty soon.
ReplyDelete· My Serial number for reference is 4M020066,,,
· November 2014,
· Lot 2,
· #66
5L210210 PROBLEM PA ............ HB3YYR
ReplyDeleteYaesu FT-991 frequency of failures
ReplyDeletehttp://yaesuft991.blogspot.ca/p/i-have-developed-basic-survey.html
My new ft-991 was made in N5E040 is that good
ReplyDelete