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.
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