Good job, Raj!
That's looking like a very easy spur fix.
The 680nH inductors in your photo are larger than the adjacent 1206 parts in your photo.
But I'd bet 1206 inductors will do just fine.
Your photo shows that the SMD inductor replacing L7 is going around C211.
I doubt there's an issue with this, since the mixer should not have any DC there,
Anyone see a reason not to do this?.
Avoiding the C211 traces is a good thing.
Note that C210 and C216 are not stuffed in a stock uBitx (schematic says 0pF).?
Raj has left them unstuffed.
Jerry, KE7ER
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On Wed, Oct 10, 2018 at 04:47 AM, Raj vu2zap showed a photo of his mods
On Wed, Oct 10, 2018 at 12:06 AM, Raj vu2zap wrote:
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.
