|
Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
|
Thread Tools |
18th Oct 2017, 10:20 am | #21 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
|
Re: Push fit connectors for EHT/ RF, high current?
There's a calculator here for what it's worth:
http://chemandy.com/calculators/roun...calculator.htm Lawrence. |
18th Oct 2017, 10:30 am | #22 | |
Dekatron
Join Date: Jul 2007
Location: Penrith, Cumbria, UK.
Posts: 3,684
|
Re: Push fit connectors for EHT/ RF, high current?
Quote:
https://www.newenglandwire.com/newt-catalog.pdf More importantly, I guess you have to use what you've got, and that's that!
__________________
Regds, Russell W. B. G4YLI. |
|
18th Oct 2017, 5:42 pm | #23 | |
Dekatron
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
|
Re: Push fit connectors for EHT/ RF, high current?
Quote:
I have 2mm enamelled copper here, and as I'll hardly ever be operating in CW mode, except for bursts of a few seconds, I think it will be fine. Duty cycle will be between 10 and 25%, and it's already only in class C. Also, if I'm going to be pulling loops out for tuning, 2mm is about the limit of workable, especially if twisted to 4mm!
__________________
Al |
|
19th Oct 2017, 9:34 am | #24 |
No Longer a Member
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
|
Re: Push fit connectors for EHT/ RF, high current?
Astral highway, I would avoid twisting this 2mm wire. Bring a straight length out bent perpendicular to the former surface, make the loop and a straight section back in with another sharp bend to get the wire back into the correct position to keep winding. Have the straight sections leading to the loop touching each other and if you wanted you could solder them together on the straight section too (if the enamel was removed there) to stop the loop pulling apart as you continue to wind the coil.
|
19th Oct 2017, 12:01 pm | #25 |
Dekatron
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
|
Re: Push fit connectors for EHT/ RF, high current?
Hey Argus25, I saw this just in time - I'm starting on the winding!
Thanks for your recommendation I will try that technique. The soldering idea is a good one, too, as I'm taking out individual turns and even a half turn, for fine tuning, towards the end of the winding.
__________________
Al |
19th Oct 2017, 1:32 pm | #26 |
Guest
Posts: n/a
|
Re: Push fit connectors for EHT/ RF, high current?
A rather neat "turns selector" I saw years ago was two bits of copperclad PCB about an inch wide made into a clip. The insulation stopped shorting to adjacent turns and the width allowed high currents without overheating.
|
21st Oct 2017, 12:13 am | #27 |
Dekatron
Join Date: Nov 2006
Location: London, UK.
Posts: 3,496
|
Re: Push fit connectors for EHT/ RF, high current?
Neat suggestion, MM. I like it; I might try that one, thank you
__________________
Al |