I did that FT-1000MP mod and the improvement was marginal. It didn't correct the problem of AGC "mush" in the passband with big pileups. Lots of IMD in big contests with that radio, too.
73, Dick WC1M > -----Original Message----- > From: Bill W4ZV [mailto:btipp...@alum.mit.edu] > Sent: Thursday, February 26, 2009 6:32 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] New K3 Firmware: Pileup-inspired AGC changes > > > > > Jan Erik Holm wrote: > > > > Don Rasmussen wrote: > >> Anyone care to take a guess as to how long an anomoly like this > would > >> live in any other mass produced HF transceiver? > >> > >> My guess - the life of the radio. > >> > >> Maybe the Flex guys would get to it. > >> > >> With Elecraft, the issue was identified on the weekend, and here it > is > >> Wednesday of the same week, the engineers understand the effect and > offer > >> test software for it. > >> > >> Kudos! > >> > > Indeed! Just one example. As I understand this problem the Yaesu > > FT-1000MP suffers from the same (lets call it) AGC IMD. On the > > MP I have noticed it myself and others too but it is not widely > > written about. > > Very glad to see that it possibly can be fixed on the K3. > > > > > > 73 Jim SM2EKM > > > > Like everything else about the nasty key-click generator FT-1000MP, > it's > left to the customer to find and fix any problems. Yaesu did nothing > about > the key clicks for at least 13 years (beginning with FT-1000D until a > production change for the MP in 2003)...and Yaesu is now reliving > design > problems with the roofing filters in the FT-2000. > > BTW Inrad did implement fixes for both the MP's clicks and the AGC > problem > (the customer must pay for all Yaesu design errors, of course): > > "FT-1000MP AGC Improvement Mod > > Some operators on major DX-peditions have complained about poor > readability > in large pile ups. From a joint effort between Inrad and some of these > operators, we are now offering the AGC mod which improves readability > somewhat for both CW and SSB. Details of the history is included in > the mod > instruction sheets. > > This new mod increases the decay time, which in the FT-1000MP is so > fast > that weaker signals can come up to full output between dots and dashes > (or > speech peaks), causing poor readability in pile ups. It also uses a > damping > resistor to eliminate a slight over shoot. Please be aware that under > "normal" or "average" operating conditions, this mod will make very > little > discernible difference." > > The AGC mod is not applicable to the Mark V." > > http://www.inrad.net/product.php?productid=86&cat=10&page=1 > > What a horrible contrast Yaesu was to my very pleasant experience with > Elecraft! > > 73, Bill > -- > View this message in context: http://n2.nabble.com/New-K3-Firmware%3A- > Pileup-inspired-AGC-changes-tp2387110p2389115.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
