[aprssig] Amazing resistors

Scott Miller scott at opentrac.org
Mon Sep 8 12:04:11 CDT 2014


I'm still looking for a reliable, reusable igniter design - if I'm going 
to load 144 rockets into box launchers on the truck, I don't want to 
have to replace all of those igniters after every firing!

Scott
N1VG

On 9/8/2014 9:46 AM, Steve wrote:
> I tell my kids the stuff that I did as a kid would bring Homeland 
> Security down on me today. I'M AMAZED I HAVE ALL MY FINGERS TODAY! 
> Steve KB1CHU
>
> On 9/8/2014 11:59 AM, Curt, WE7U wrote:
>> On Sat, 6 Sep 2014, Al Wolfe wrote:
>>
>>>   In my mis-spent youth I was involved with many projects that 
>>> required a squib, that is, an electrical igniter  After a lot of 
>>> trial and error we settled on some very thin steel wire. Basically, 
>>> we found some picture hanging wire and discovered it was 
>>> seven-stranded. Unwinding one of the strands gave us a single thin 
>>> steel wire that was perfect for our projects. It would instantly 
>>> explode with 120 volts applied and glow brightly at 12 volts before 
>>> oxidizing and disintegrating.
>>
>> Hah!  In junior high or early high school I figured out that a 
>> 30-gauge wire-wrap wire made a better igniter for my Century rocket 
>> engines than the expensive igniter wires they sold... Saved money 
>> -and- made every launch successful.  I also wired my launcher to the 
>> family's car battery instead (launched from the driveway), which also 
>> increases reliability.
>>
>> I claim to know nothing about blowing up resistors on purpose... Really.
>>
>
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