On 12/03/19 1:36 AM, Curt via Groups.Io
Thanks for all the "hope you are better" comments. My head wound
has healed and the other health problems are receding, so all good
at this point.
Curt- I think that we may never get clearer data, unless your
larger group build can provide this information!
Gordon's approach with the daughter board (single end relay
replacement) may well be easier to effect, but it sounds like it
may also be at a slightly greater cost and complexity. I do
accept that removing multi-legged through-hole parts is not always
an easy task, especially if you have never done it before. It
would be good if somebody had a video of doing this with
techniques for breaking up the existing part, solder flux/wick
work and removal of the individual pins. This may make the task
more straightforward for the regular constructor. I have the
relays on the bench, but not yet installed. When I get around to
doing the replacement I plan to try and make a short video of the
Many constructors seem really concerned about their rig's
compliance. I think this is probably an unnecessary concern given
the power output of the uBITx. Doing the mods cannot guarantee
compliance, but doing both mods is likely to significantly reduce
spurs and harmonics bringing it well within the unwanted emissions
from a 100w rig.
I suggest that more, clearer data is needed before recommending a
particular spurious fix. The Axicom relays may work if a board
does not require a huge improvement - I think this may be why some
are not seeing compliance with this solution. The alternative
solution using 3 relays on a daughter board is actually easier for
many builders since it has no need to remove relays from the board
- but problem is that no one is sourcing it as a kit. On the 45
MHz fix, I am not sure that replacing two coils is adequate in
itself. We honestly need more data. Our own local club has a
large group build - we can contribute data when we have it on v4.
I don't want the community having a false hope on any particular
cure - and also want the community to understand that a sufficient
fix is possible.