The noise blanker IMD problem will cause 3:rd order IMD,
this is not the case here.
This problem is poor 2:nd order IMD performance due to
bad PIN diodes in the bandpass filter switching.
Fix is to replace those PIN diodes with better ones.
Many people have used HP5082-3081 diode however it is
expensive.
I have used the diode BA479, very low cost and works
perfect. Ofcourse there are other PIN diodes on the
market that can be used.
73 good luck / Jim SM2EKM
--------------------------------------------------------------
Robin Thompson wrote:
In message <000f01c4ad99$602697c0$60c8eb3e@Willem>, Willem Braeckevelt
<on5jy@village.uunet.be> writes
Dr oms ,
Any help on my FT1000D i have in evening hours strong broadcasting
interference on 17m 30m and little on 20m ?
If i put 40m dipole on 20m 17m 30m bands also broadcasting come up?
Any idea whats wrong on receiver?
73's Wim ON5JY
Sounds like it could be a noise blanker/ IMD problem Wim.
Have a look at some suggested mods for the FT1000 - this is a really
useful site !
http://www.angelfire.com/md/k3ky/page64.html
73
Robin
G3TKF
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