Thanks Raj, very much appreciated! I will have to do this mod then which does not jeopardise the output power!
Il 10/ott/2018 09:06, "Raj vu2zap" <
rajendrakumargg@...> ha scritto:
I found good reduction of spurs with the following mods:
1. Replace L5 with an SMD inductor 680nH or 681, mount at right angles to old toroid
2. Replace L7 as above.
The 45MHz filter is not required and you get almost the same power out as stock boards.
If you ALSO have 45MHz the spurs get further reduced by a little but loss of output power.
I used what I remember buying Murata inductors 1206 size.
Feed back will be appreciated.
With Mikes W0MNE relay fix and this mod will have the uBitxv3 and v4 boards kosher. The relays
have their contacts below and close to ground plane and I suspect thats is what fixes
the harmonics. I have not tried it but ordered some try after a few weeks when I get back
to shack again.
Cheers
--
Raj, vu2zap
Bengaluru, South India.
