[Boatanchors] D-104 for DX-100 crystal or dynamic and what impedance?

[Rob Atkinson]

you'll get a zillion different answers.  Go with a D104 crystal
element and put a 10 meg resistor on the grid of the input triode and
you'll be okay.  Crystal elements need high Z and 10 meg will give you
the full frequency response of the element which is a 20 dB rise from
100 cps up to 3 kc and a 20 dB roll off from 3 kc to 5 kc.  You can't
beat the D-Wonderful when it's got a 10 meg load.

73

Rob
K5UJ

On 3/12/17, Howie WA3MCK <wa3mck at gmail.com> wrote:
> Group,
>
> I'm preparing to put my old (but refurbished) DX-100 on the air as soon as
> possible.
> I do not have a microphone but I do remember that almost EVERYONE utilized
> an Astatic D-104.
>
> What I don't remember is:
> 1.  What element is preferable? Crystal or dynamic, and
> 2. What impedance should I go with?
>
> It's been about 40 years since I've had her on the air and I have forgotten
> quite a bit about this rig.
>
> For the past five or six years I've had my highly modified (600 ohm
> balanced audio input) DX-60 on AM with a fancy studio mike, processor, and
> other embellishments.
>
> Recommendations, advice, and references solicited.
>
> 73 de Howie WA3MCK