[ARC5] T-17 Microphone

[Mark K3MSB]

Aw fer..... sigh....... sometimes I just don't dig deep enough.

When I was putting the mic back in the box I decided to pry the mic element
out.  It's a modern "American D-30 Dynamic Hi-Z made in Japan" mic head,
and that is probably a hi-z to lo-z modern JA matching tranny....

So, bulletin.... bulletin.... bulletin.... it's not NIB at all....

73 Mark K3MSB


On Wed, Jun 11, 2014 at 8:00 PM, Mark K3MSB <mark.k3msb at gmail.com> wrote:

> Hi Ken
>
> www.k3msb.com/temp/T17_3.jpg <http://www.k3msb.com/temp/T17_2.jpg>
>
> The back of the mic is marked "Microphone T-17 14684 Phila-44"
>
> Mark K3MSB
>
>
> On Wed, Jun 11, 2014 at 7:24 PM, Kenneth G. Gordon <
> kgordon2006 at frontier.com> wrote:
>
>> On 11 Jun 2014 at 17:56, Mark K3MSB wrote:
>>
>> > Here's 2 photos the the matching transformer.
>> >
>> > www.k3msb.com/temp/T17_1.jpg
>> > www.k3msb.com/temp/T17_2.jpg
>> >
>> > It looked original form the way it was wrapped etc, but I've not seen
>> the
>> > guts of a T-17 before.
>> >
>> > 73 Mark K3MSB
>>
>> Mark: that transformer is not WWII vintage: I recognize it. It is one
>> that was
>> available from Radio Shack up until quite recently. I cannot remember the
>> impedances, but I THINK it was from 1K CT to 8 ohms.
>>
>> I have used those transformers as "high impedance" to 8 ohm transformers.
>> They work fairly well for that.
>>
>> For one thing, the mounting tab on the end that can be seen has been
>> "scrunched". If you opened that up, you would see what I mean.
>>
>> Secondly, from the bare shape of the "box" that is holding the mic
>> element,
>> that does not look, to me, like a T-17. That "box" appears to be
>> "tear-drop"
>> shaped, whereas, as I remember it, the element box on a T-17 was round.
>>
>> If you could post photos of the complete mic we could give you more
>> accurate
>> advice.
>>
>> BTW, good job on your setup. It is beautiful. How is the transmitted CW
>> quality? Chirp gone now?
>>
>> Ken W7EKB
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>
>