[Chugalug] OT: Anyone of you guys good with electrical circuits?

Stephen Kraus ub3ratl4sf00 at gmail.com
Fri Feb 8 15:50:15 UTC 2013


The only difference between the U94 and U92 is the switch for PTT which is
wired in, I can get you pin outs when I get home
On Feb 8, 2013 10:44 AM, "Lynn Dixon" <boodaddy at gmail.com> wrote:

> Stephen,
> Awesome, thanks for that! I did buy 2 of the switchcraft jacks from
> Aircraft Spruce that are panel mount for the mic input.
> I am just trying to wrap my head around matching the impedances for the
> speakers as well as driving the mic circuit with the 5v feed from the AC97
> header.  I could always use a molex and step the 12v down to 9v, but it
> would be nice if I could just use the 5v coming from the AC97 headers.
>
> Do you have any of those U92 or U94 jacks on hand?  If you do I might pick
> some up to tinker with.
>
>
> On Fri, Feb 8, 2013 at 10:32 AM, Stephen Kraus <ub3ratl4sf00 at gmail.com>wrote:
>
>> Lynn, I have the jack you are looking for, if its the same as the
>> military jacks. Should be called a U92 or U94
>>  On Feb 8, 2013 10:28 AM, "Jason Brown" <lists at masterforge.com> wrote:
>>
>>>  I think I misunderstood "House Jacks"....
>>>
>>> --Jason
>>>
>>> On 02/08/2013 09:56 AM, Phil Sieg wrote:
>>>
>>> Errr Jason, I am not sure where you got the idea Lynn wanted and AC
>>> power plug on the front of her PC?
>>>
>>>  I read her meaning as a couple of 1/4" phono jacks(?) for an aviation
>>> headset that works at funny/different impedance than standard pc audio
>>> amplification.
>>>
>>>  This is what came to mind for me:
>>> http://www.crutchfield.com/p_818EF2/HiFiMAN-EF2A.html?tp=48508&kw=&org=pla&nw=g&crv=19722308425
>>>
>>>  However it only solves the listening side, not the mic side of things,
>>> and wont fit in a drive bay.... But the tubes sure would look cool on top
>>> of her rig ;-)
>>>
>>>  Phil Sieg
>>> President
>>> SeniorTech LLC / Snapfon
>>> www.snapfon.com
>>>
>>> B: 423.535.9968
>>> F: 423.265.9820
>>> M: 423.331.0725
>>> phil.sieg at seniortechllc.com
>>>
>>>
>>>  On Feb 8, 2013, at 9:32 AM, Jason Brown <lists at masterforge.com> wrote:
>>>
>>>  So you want mains (110v-120v) standard 3 prong electrical outlets in a
>>> 5.25" drive bay?
>>>
>>> Possible, but might introduce some noise, it also might not.
>>> There is risk involved, but mostly to your computer equipment. If there
>>> is every a short to your case your computer is toast and most likely every
>>> thing in it and attached to it.
>>>
>>> Since you have limited electrical knowledge I would recommend this route:
>>>
>>> Buy a cord like this one:
>>> http://www.sears.com/shc/s/p_10153_12605_SPM2407065603P
>>>
>>> Get a 5.25" bay and front panel, cut out the shape needed, glue the cord
>>> in flush with a glue of your choice.
>>>
>>> Run the cord out the back of your PC somehow.  You might have a cutout
>>> large enough to pass it through.
>>>
>>> Install a rubber grommet or other protector around the cord where it
>>> exits the case (Sharp edges, you don't want that cutting into the extension
>>> cord.
>>> http://www.oreillyauto.com/site/c/detail/DOR3/02365/N0282.oap?ck=Search_grommet_-1_-1&keyword=grommet
>>>
>>> Alternately:
>>> If you don't need much power, and want it to only run while the PC is
>>> turned on you could wire in one of these to your 12v Rails:
>>> http://www.harborfreight.com/80-watt-continuous-power-inverter-66972.html(or similar, keep it small < 100 watts).
>>>
>>> Microphone:
>>> Here is some info on wiring electret microphones.
>>> http://www.epanorama.net/circuits/microphone_powering.html#basics
>>> I am sure someone sells an off the shelf version but I don't have the
>>> time to search for it right now.
>>>
>>> Good luck, and send us pictures!
>>>
>>> --Jason
>>>
>>>
>>>
>>>
>>>
>>> --Jason
>>>
>>> On 02/08/2013 01:59 AM, Lynn Dixon wrote:
>>>
>>> I have a pretty nifty project that I have been thinking about doing, but
>>> its a bit out of my electrical circuit knowledge.
>>>
>>>  In a nutshell, I would like to mod one of my 5.25" bays on my PC to
>>> house jacks that I can plug my aviation headset into.   There is a pretty
>>> good difference in impedance between aviation headsets and PC audio.  There
>>> is also a challenge in driving the electret mic in the headset using the PC
>>> mic input.
>>>
>>>  Bonus:  If I can plug this modded panel into my motherboards front
>>> panel audio input, that would be awesome.
>>>
>>>  If anyone of you guys are good with basic electrcal circuits give me a
>>> shout.  I can spring for dinner / beer if your willing to help.  Hell, I
>>> will even be president for a Chugalug meeting if we can get enough folks
>>> together to discuss this :)
>>>
>>>  Sorry for the off topic post to the LUG.
>>>
>>>
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