Thanks for the replies.
My layout is?almost identical to the original, except?I'm using all thru-hole components and the Adafruit SI5351. Filters/relays/IRF510's/transformers placement is identical.?Don't have a suitable photo at the moment, not to mention it looks a mess!?
And as for Ashhar's comment, everything is very stable otherwise! I've made several FT8 QSO's with 1W output!
Actually I stand corrected, the issue doesn't seem to be related to the mixers/modulator.
The symptoms on SSB should clear up when I track down the problem on CW.
Some sort of ringing effect caused by RF feedback??Can't rule out either?I?may have?some dodgy 510's.
For?output transformer T11,?I used the same trifilar format as all the others.?The unused?winding?(4 and 3)?is simply not connected to anything, as per schematic. An earlier post by Ashhar for his prototype stated "8T:10T" for T11. Not sure if this means conventional wound with 8 turns for one (primary/secondary) winding, 10 turns for the other. So maybe a clarification would help.
Thanks,
Mike
