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Great news! I am 67 myself, but the
0805 parts are BIG, you should try your hand at 0201, that will
drive you to drink really quick.
On 6/10/2018 9:31 PM, Tom Christian wrote:
I made Howard's
mods on both my uBITXs with great results in spite
of myself.....:) It was a comedy of errors.... On both rigs, I
have any problems with the 220pf capacitors across R87 & R88,
the 0805 size was like working with big grains of salt. The small
gave these mid-60s eyes a good workout!. The resistor/inductor
another story. I had issues with the 1K ohm R86 teepee attempt
the 33uH inductor.
On the first rig, I destroyed the SMD resistor with too much heat
trying to make the solder joint (went to infinity). I didn't have
replacements, so I used a descrete 1K since the inductor I had on
was also descrete. Then on the 2nd rig, the 1K resistor flew out
the tweezers and I never was able to find it.... So this rig also
descrete components. Enclosed is a humbling picture......:) I
need more SMD practice!
I don't have a precision power meter for measurements, but my
analog SWR/Power meter shows before and after readings as follows:
Band Before After
------- --------- ------
80 5 watts 4 watts
60 2 3
40 4 4
30 2 3
20 2 4
17 1.5 4
15 1 2
12 0.8 1.5
10 0.3 1.2
Needless to say, I'm VERY pleased with the power increase! My
when testing with other hams on FT8 have been good clean signals.
is going to make the uBITX even more fun!
Thank you so much, Howard, for the great recommendations!