[ARC5] Removing set screws

[Michael Hanz]

Outstanding, Scott!  Thanks much for that.  I see an induction heater in 
my project queue in the near future!

As if I need any more projects...:-(

  - Mike

On 11/18/2019 10:05 PM, Scott Johnson wrote:
>
> OK, at the risk of going overboard, I will share with you my secret 
> for heating set screws.  I used to use a soldering iron, but I tend to 
> be impatient, so it made a work coil for my induction heater that is a 
> 1 ¼’ ID 3 turn coil of 12 AWG enameled copper I place it around the 
> knob (plastic, bakelite, or even aluminum), and about 3 seconds is all 
> it take to turn the setscrew red.  Let it cool a bit, and it comes 
> right out.  You can buy cheap little switch mode induction heater kits 
> on ebay for 15-20 bucks, they run well from a 24 VDC supply.  I have a 
> more elaborate induction heater , but the cheap ones work FB.
>
> Scott V. Johnson W7SVJ
>
> 5111 E. Sharon Dr.
>
> Scottsdale, AZ 85254-3636
>
> H (602) 953-5779
>
> C (480) 550-2358
>
> scottjohnson1 at cox.net <mailto:scottjohnson1 at cox.net>
>
> scott.johnson at ieee.org <mailto:scott.johnson at ieee.org>
>
> *From:*arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> *On 
> Behalf Of *Michael Hanz
> *Sent:* Monday, November 18, 2019 7:59 PM
> *To:* s at balrogs.org; Mike Feher <n4fs at eozinc.com>
> *Cc:* arc5 at mailman.qth.net
> *Subject:* Re: [ARC5] Removing set screws
>
> It was a humorous rhetorical question, Scott. :-)
>
> On 11/18/2019 9:03 PM, Scott Robinson wrote:
>
>     I thought military radio >> metal knob.
>
>     Stuck plastic knobs are a royal PITA.
>
>     /scott robinson
>
>     On 11/18/19 4:46 PM, Mike Feher wrote:
>
>         Hah, hah, Mike. I never considered the composition of the knob
>         on which I used the described procedure. There is no real heat
>         setting on those small torches, other than noting the flame
>         itself. Regardless, it has always worked for me on the knobs
>         with which I had an issue otherwise. 73 – Mike
>
>         Mike B. Feher, N4FS
>
>         89 Arnold Blvd.
>
>         Howell NJ 07731
>
>         848-245-9115
>
>         *From:*Michael Hanz <aaf-radio-1 at aafradio.org>
>         <mailto:aaf-radio-1 at aafradio.org>
>         *Sent:* Monday, November 18, 2019 12:26 PM
>         *To:* Mike Feher <n4fs at eozinc.com> <mailto:n4fs at eozinc.com>
>         *Cc:* arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net>
>         *Subject:* Re: [ARC5] Removing set screws
>
>         Heh, heh...what heat setting do you use for thermoplastic
>         knobs?:-)
>
>         - Mike  KC4TOS
>
>         On 11/18/2019 11:58 AM, Mike Feher wrote:
>
>             Hi Dave –
>
>             I have found that heat always work. This is even if
>             Loctite was used.  Once the appropriate wrench is found
>             and doe not do the job by itself, apply heat. When I run
>             into a tough one, I plece the wrench into the screw and
>             secure the handle with long nose pliers. After that I
>             apply heat from a small torch for a few seconds and out
>             comes the screw. 73 – Mike
>
>             Mike B. Feher, N4FS
>
>             89 Arnold Blvd.
>
>             Howell NJ 07731
>
>             848-245-9115
>
>
>
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> -- 
> Michael Hanz - KC4TOS

-- 
Michael Hanz - KC4TOS

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