No more questions at the moment (but more to come, I'm sure ).
Thought I'd post a few more pics of the build.
Will definitely revise my build order for any future builds (as suggested by some here).
Since I am adding Master Volume and Presence control to the "Generic 3rd Gen Low-plate Classic" - I am making some adjustments as I go - and some changes have been made after some of the pictures were taken.
Not too far off from final assembly and initial testing (but still taking my time)...
looks like you know what you're doing beautiful build so far.
may I ask how you manage to solder your braided/shielded cables so neatly to the back of the pots without the heat melting through to short the internal conductor?
norburybrook wrote: ↑Tue Jul 31, 2018 6:39 pm
looks like you know what you're doing beautiful build so far.
may I ask how you manage to solder your braided/shielded cables so neatly to the back of the pots without the heat melting through to short the internal conductor?
Mine always look a mess!!
M
Thank you for the kind words.
Regarding the shielded soldering - I reckon there are a few factors at play. But my approach was to have plenty of heat on the iron (around 800 degrees Fahrenheit) - and apply flux to the back of the pots. "Pre-tin" the pots and the shield separately. Then position the shield on the back of the pot as you want it. Then apply heat and solder. While high heat may be counter intuitive, the idea is - you can get your surfaces hot enough to flow - without heat soaking the surrounding area (which will happen if it takes "longer" to get your surfaces up to temp). Of course the thermal characteristics of the insulator would make a difference too. I used Belden RG316 (84316) cable.
I guess I got lucky - as this is my first Dumble build and got good results on the first attempt.
Having said that - I guess we'll have to see if I did melt through the insulator - but I don't believe that I did.
stephenl wrote: ↑Wed Aug 01, 2018 12:16 am
Be careful with the teflon fumes from high heat. The fumes can be quite toxic - starts with flu-like symptoms. Use good ventilation.
I've never been able to heat it enough to produce fumes.
from Wiki:
PTFE is stable and nontoxic at lower temperatures, it begins to deteriorate after the temperature reaches about 260 °C (500 °F), and decomposes above 350 °C (662 °F). The degradation by-products can be lethal to birds, and can cause flu-like symptoms in humans—see polymer fume fever.
stephenl wrote: ↑Fri Aug 03, 2018 6:50 pm
from Wiki:
PTFE is stable and nontoxic at lower temperatures, it begins to deteriorate after the temperature reaches about 260 °C (500 °F), and decomposes above 350 °C (662 °F). The degradation by-products can be lethal to birds, and can cause flu-like symptoms in humans—see polymer fume fever.
Thanks for the specifics. I guess another good reason not to heat-soak the cable when soldering.
).
beautiful build so far.
- but I don't believe that I did.
