| Author |
Message |
    
Tecnicoloco
Junior Member
Username: Tecnicoloco
Post Number: 39
Registered: 4-2003
| | Posted on Saturday, August 14, 2004 - 9:29 pm: | 
|
I need some input on how to modify my stock Yaesu FT-890 for wider audio TX.
I read somethimg about changing filters.
Some people replace they filters with 6 Khz filters,dunno have a clue???
Thanks in advance
Tecnicoloco |
Bruce
Senior Member
Username: Bruce
Post Number: 1462
Registered: 9-2003
| | Posted on Saturday, August 14, 2004 - 9:58 pm: |
|
the ft-840 filter is 6 for am at least mine is |
Hollowpoint445
Intermediate Member
Username: Hollowpoint445
Post Number: 251
Registered: 6-2004
| | Posted on Sunday, August 15, 2004 - 12:50 am: |
|
I think he's talking about changing the SSB transmit filters to 6KHz for "Hi-Fi SSB" Bruce.
|
Bruce
Senior Member
Username: Bruce
Post Number: 1467
Registered: 9-2003
| | Posted on Sunday, August 15, 2004 - 10:49 am: |
|
Ok i think he needs to check with the FCC if i remember they are citing people for running that mode....... there is a STINK on the ham bands over that. |
Bruce
Senior Member
Username: Bruce
Post Number: 1473
Registered: 9-2003
| | Posted on Monday, August 16, 2004 - 5:35 am: |
|
This is a small part of several FCC releases.....
"The FCC has written nearly two dozen Amateur Radio licensees whose 20-meter SSB signals were said to be "unusually wide, overpowered, or both." The FCC's Riley Hollingsworth did not identify the specific licensees involved, but he said some of them were believed to be over-the-road truckers operating mobile. Licensees were in several locations, including Illinois, New York, Mississippi, Arkansas, Puerto Rico, Ohio, Kentucky, North Carolina and Florida. Hollingsworth's letter said information received by the FCC indicates that the stations involved "ignored requests from other licensees operating on adjacent frequencies" to do something about the wide signals. He said the operations in question were believed to be confined to the high end of the 20-meter band, above 14.300 MHz. "
Changing your SSB filter may not be LEAGAL.
Bruce |
Highlander
Advanced Member
Username: Highlander
Post Number: 585
Registered: 12-2001
| | Posted on Monday, August 16, 2004 - 6:10 pm: |
|
I've been monitoring some of those audio crunchers on 20 and 80. Man, some of them are a wee bit on the wide side... |
Tecnicoloco
Junior Member
Username: Tecnicoloco
Post Number: 40
Registered: 4-2003
| | Posted on Friday, August 20, 2004 - 7:17 pm: |
|
Hi All:
I am sorry to made my question in this way,I been reading some sites and they claim that is not ilegal,on the other hand I been reading the rules for my country and is not ilegal in MX,will be the same to wideing the TX audio of a 11 Meters Cb Radio,normally 2.2Khz. to 3.0 Khz.,just to insert more audio information.
Best Regards.
Tecnicoloco |
Bruce
Senior Member
Username: Bruce
Post Number: 1494
Registered: 9-2003
| | Posted on Saturday, August 21, 2004 - 10:45 am: |
|
A 6khz wide SSB signal is ILLEAGAL or at best pushing it. Our FCC is right now sending letters to people they hear on the air using this mode. Thoes who say its LEAGAL better go check the acceped rules of LEAST POWER AND NOT CAUSING INTERFERANCE.....and wide BANDWIDTH will cause interferance. |
Bruce
Senior Member
Username: Bruce
Post Number: 1504
Registered: 9-2003
| | Posted on Tuesday, August 24, 2004 - 11:57 am: |
|
VERRRRY INTRESTING!
http://www.arrl.org/announce/bandwidth.html |
