[ARC5] More on Bashless T-17 Microphone Resurrection

[Richard Knoppow]

    I can confirm that works. I've used carbon from old T-1 and F-1 
telephone elements to replace carbon in old double-button broadcast 
mics.  It worked, should be OK in a T-17 if you can get the element open 
and re-seal it. I would make sure the contact surfaces in the capsule 
are clean.

On 6/22/2016 5:57 PM, hwhall at compuserve.com wrote:
> How about transplanting the granules from late vintage telephone
> "transmitter" elements?
>
> Wayne
> WB4OGM
>
> -----Original Message-----
> From: Mike Feher <n4fs at eozinc.com>
> To: 'DSP3' <jeepp at comcast.net>; arc5 <arc5 at mailman.qth.net>
> Sent: Wed, Jun 22, 2016 10:03 am
> Subject: Re: [ARC5] More on Bashless T-17 Microphone Resurrection
>
> The old style rheostats for the AC line were made like a long ceramic
> cylinder with a knob on one end. Most of these were maybe about 1.25” in
> diameter and about 4 inches long not counting the knob. There really
> were many versions, from smaller to larger. Regardless, as I recall,
> these were filled with carbon granules which were compressed as the knob
> was turned clockwise and hence the resistance decreased, and of course
> the opposite the other way. One of these would yield enough granules for
> a hundred T-17s or similar. 73 – Mike
>
> Mike B. Feher, N4FS
> 89 Arnold Blvd.
> Howell, NJ, 07731
> 732-886-5960
>
> *From:*ARC5 [mailto:arc5-bounces at mailman.qth.net
> <mailto:arc5-bounces at mailman.qth.net?>] *On Behalf Of *DSP3
> *Sent:* Wednesday, June 22, 2016 10:49 AM
> *To:* arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net>
> *Subject:* Re: [ARC5] More on Bashless T-17 Microphone Resurrection
>
> The toner material is carbon-based, to be sure, but is far, far smaller
> particulate, not granules as would be in a single-button carbon mic
> element.  Its more like a graphite substance. I really don't think one
> could reasonable handle the material?
>
> Jeep - K3HVG
>
> On 6/22/2016 8:17 AM, Mike Everette via ARC5 wrote:
>
>     This is an old thread to be sure; but I have a question.
>
>     What is the material used in black computer printer cartridges?  If
>     it's carbon, what about refilling a mic element using one of the DIY
>     cartridge kits?
>
>     73
>
>     Mike
>
>     WA4DLF
>
>
>
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-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL