[AMRadio] The Replacement Mod for the D104

Rob Atkinson ranchorobbo at gmail.com
Sat Aug 28 21:05:00 EDT 2010

i did not know the 10-da was dynamic.  I recall it was used a lot on
PA systems back in the 1960s.

I have a J30 around here somewhere I've had so long I don't even
remember how I got it but I think it was part of a T-60 I bought back
in the 1970s at a hamfest.  I sure hope I did not sell or give it
away.  I have done some investigating and I believe it will work well
with a 10 Meg input Z rig.  it is now one of these "bullet" mics that
harmonica players like, along with the shure green bullet.
therefore, it is going for higher prices.


On Sat, Aug 28, 2010 at 6:00 PM, Geoff Edmonson <w5omr at att.net> wrote:
>  On 08/28/2010 02:21 PM, Bob Macklin wrote:
>> A properly designed preamp is not a problem. But the preamps used by the CB
>> crowd leave a lot to be desired.
> Some years ago, John/WA5BXO and Otis/K5SWK (or John got it for Otis, I
> don't remember) purchased a number of JT-30 cartridges.  Ronnie/K5WLT
> got a few of those, also.  From what I remember, they were -damn near-
> the exact replacement element for the venerable D-104 head.
> Todd; the 10-D A head was, indeed, a Dynamic head and worked -lots-
> better with the pre-amp for lower impedance requiring rigs.
> --
> 73 = Best RegardS,
> -Geoff/W5OMR
> (/m5 Baja Spring, TX)
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