Excellent news Phil and one of the "solder sucker" points I was about to
send you.
Other...
Before faulty component extraction firstly bear in mind any excessive
heat from solding-iron to the tinned copper track will
easily/disastrously lift the track from the pcb.
If possible isolate each connecting leg of the faulty component and
after extraction carefully "suck" any excess solder from the track side
connection.
For the new component replacement and without undue pressure re-drill
the existing hole from the screen side all the way thru any remaining
solder blocking the track side connection.
I cannot emphasise enough the word "carefully" and have found (link
below) these little handraulic drill bits an excellent tool for the
re-drill process. Pcb screen side faulty component extraction I find a
crocodile clip to the leg with small length of attached insulated wire
to give location and additional pull an ideal tool.
The Omni VI is no spring chicken and I have a spare LPF board ready for
immediate replacement when needs must and my apols if above comes across
as trying to teach my Granny how to suck eggs.
73/GL
Malcolm/F5VBU
https://www.amazon.co.uk/10pcs-Helical-Groove-Tungsten-Carbide/dp/B00PZYFRLI/ref=sr_1_9?ie=UTF8&qid=1546583790&sr=8-9&keywords=pcb+drill+bits
On 1/3/2019 9:42 PM, Phil Erickson wrote:
Hi all,
Success! The "low 12 meter" problem was a cracked solder joint on one of
the coils making up the 12m BPF. Tough to spot. Wiggling the coil a bit
caused things to jump to life intermittently, so with the help of Will
KD4FOV, we put it under the microscope and fixed the problem. Tip: don't
just dump more solder on the joint: as Gary suggested, suck dry all the old
solder and reflow the pin.
Things are now back to normal on both RX and TX without painful retuning
of the BPF and RX is nominal sensitivity, while TX puts out full power.
Thanks very much to everyone who helped on this thread. Looking forward
to putting it to use. I learned a lot!
73
Phil W1PJE
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|