Re: [Elecraft] K2 slug-tuned inductors
They're readily available from Amazon. https://www.amazon.com/Hanperal-Slotted-Ceramic-Alignment-Screwdriver/dp/B01AJC29OI Al, K2ZN Sent via mobile Original message From: Robert G Strickland Date: 9/21/18 23:07 (GMT-05:00) To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 slug-tuned inductors Don... Where did you find a ceramic screwdriver? ...robert __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
Don... Where did you find a ceramic screwdriver? ...robert On 9/21/2018 21:52, Don Wilhelm wrote: Chuck and all, Those particular inductor cores with the narrow slot are difficult to break, and they seldom stick. Since I adjust them during repairs, I would wear out many tuning tools in short time. I bought a ceramic screwdriver with a 1/8 inch wide blade. I have another with a 5/32 inch wide blade that I use for adjusting those new trimmer capacitors in plastic cases. 73, Don W3FPR On 9/21/2018 5:00 PM, hawley, charles j jr wrote: I would get a new wand or file one down. Some of those things get difficult to turn and the screwdriver breaks the core. Is there anyway to loosen them up before they break? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to rc...@verizon.net -- Robert G Strickland, PhD ABPH - KE2WY rc...@verizon.net.usa Syracuse, New York, USA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
Chuck and all, Those particular inductor cores with the narrow slot are difficult to break, and they seldom stick. Since I adjust them during repairs, I would wear out many tuning tools in short time. I bought a ceramic screwdriver with a 1/8 inch wide blade. I have another with a 5/32 inch wide blade that I use for adjusting those new trimmer capacitors in plastic cases. 73, Don W3FPR On 9/21/2018 5:00 PM, hawley, charles j jr wrote: I would get a new wand or file one down. Some of those things get difficult to turn and the screwdriver breaks the core. Is there anyway to loosen them up before they break? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
The last time I had to do this and didn't have a dedicated tool, I took a Chinese take-out bamboo chopstick and carved it to fit the slug. It's fairly easy to do and if you mess it up you just cut off that part and try again. The bamboo is strong but easy to carve, and it's non-magnetic of course. On Fri, Sep 21, 2018 at 5:39 PM Bob Nielsen - N7XY wrote: > A metal screwdriver might affect the inductance. There are several > inexpensive tuning tools made with a plastic handle and a small thin > metal blade, for example: > > https://www.digikey.com/product-detail/en/bourns-inc/H-90/H90-ND/262571 > > I used a similar tool when I built my K2. > > Bob, N7XY > > On 9/21/18 7:41 AM, AE0MM via Elecraft wrote: > > The green plastic tuning tool is too wide to fit in the slot of the > narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the > small slot 1µH inductors? > > > > Thanks, > > --mark/ae0mm > > __ > > Elecraft mailing list > > Home: http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/mmfaq.htm > > Post: mailto:Elecraft@mailman.qth.net > > > > This list hosted by: http://www.qsl.net > > Please help support this email list: http://www.qsl.net/donate.html > > Message delivered to n...@n7xy.net > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ard...@gmail.com -- -+-+-+-+- Jenny Everywhere's Infinite: Quark Time http://quarktime.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
A metal screwdriver might affect the inductance. There are several inexpensive tuning tools made with a plastic handle and a small thin metal blade, for example: https://www.digikey.com/product-detail/en/bourns-inc/H-90/H90-ND/262571 I used a similar tool when I built my K2. Bob, N7XY On 9/21/18 7:41 AM, AE0MM via Elecraft wrote: The green plastic tuning tool is too wide to fit in the slot of the narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the small slot 1µH inductors? Thanks, --mark/ae0mm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to n...@n7xy.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
I would get a new wand or file one down. Some of those things get difficult to turn and the screwdriver breaks the core. Is there anyway to loosen them up before they break? Chuck Hawley c-haw...@illinois.edu Amateur Radio, KE9UW aka Jack, BMW Motorcycles From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on behalf of AE0MM via Elecraft [elecraft@mailman.qth.net] Sent: Friday, September 21, 2018 9:41 AM To: Elecraft Reflector Subject: [Elecraft] K2 slug-tuned inductors The green plastic tuning tool is too wide to fit in the slot of the narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the small slot 1µH inductors? Thanks, --mark/ae0mm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to c-haw...@illinois.edu __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
Ended up using scissors to trim a plastic toothpick into a slug-tuned inductor adjustment tool. --mark/ae0mm ‐‐‐ Original Message ‐‐‐ On Friday, September 21, 2018 10:22 AM, Kevin Cozens wrote: > On 2018-09-21 10:41 AM, AE0MM via Elecraft wrote: > > > The green plastic tuning tool is too wide to fit in the slot of the > > narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the > > small slot 1µH inductors? > > I'm assuming the screwdriver would be a metal one. It would let you turn the > slug but you would have to use it with care as it could damage the top of > the slug. Also the metal screwdriver can affect the inductance of the > inductor and throw off the adjustment. > > Your safest option is to shave a little off each side of the plastic tuning > tool to make it fit. You shouldn't need to shave much off it to make it fit. > > > > Cheers! > > Kevin. > > http://www.ve3syb.ca/ | "Nerds make the shiny things that > https://www.patreon.com/KevinCozens | distract the mouth-breathers, and > | that's why we're powerful" > Owner of Elecraft K2 #2172 | > #include | --Chris Hardwick > > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to ae...@protonmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K2 slug-tuned inductors
On 2018-09-21 10:41 AM, AE0MM via Elecraft wrote: The green plastic tuning tool is too wide to fit in the slot of the narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the small slot 1µH inductors? I'm assuming the screwdriver would be a metal one. It would let you turn the slug but you would have to use it with care as it could damage the top of the slug. Also the metal screwdriver can affect the inductance of the inductor and throw off the adjustment. Your safest option is to shave a little off each side of the plastic tuning tool to make it fit. You shouldn't need to shave much off it to make it fit. -- Cheers! Kevin. http://www.ve3syb.ca/ | "Nerds make the shiny things that https://www.patreon.com/KevinCozens | distract the mouth-breathers, and | that's why we're powerful" Owner of Elecraft K2 #2172 | #include | --Chris Hardwick __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] K2 slug-tuned inductors
The green plastic tuning tool is too wide to fit in the slot of the narrow slot slug-tuned inductors. Is it safe to use a screwdriver on the small slot 1µH inductors? Thanks, --mark/ae0mm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
