开云体育

The link to the Astatic catalog that I posted should help you. Note that the nomenclature for the head and the stand are different.

73

-Jim
NU0C

On Fri, 23 Feb 2024 18:01:50 -0600
"Ed KG5UN" <maikranze@...> wrote:

> Sorry if I am hijacking the thread, but I wanted to ask a question.
>
> I have a model 10 Astatic mic with no data plate on it.
> It has the MC-563 element in it.
> Would that make it a 10C or a 10D?
> I really dont care for the way it sounds, would the 470K ohm resistor help?
>
> Thanks,
> Ed
> KG5UN
>
> On Fri, Feb 23, 2024 at 5:52?PM Jim Shorney <jimNU0C@...> wrote:
>
> >
> > I suppose you mean the D-104-C? In catalog 197 it is listed only 3 dB
> > lower than the crystal version. Interestingly they don't specifically say
> > which is in the T-UP9-D104 "Silver Eagle". That suggests to me that at some
> > point they did begin to quietly phase out the crystal and replace them with
> > ceramic. Who's going to know? You would have to open one up and few would
> > want to do that. I have a garage sale find Golden Eagle and two T-UG8
> > models all gelded with the 470K resistor mod. I used the Golden Eagle on my
> > TR7 for a while. I still plug it in now and then for fun. It looks like
> > hell, the lacquer coating on the stand neck is trashed. I also have a NOS
> > cartridge tucked away in a drawer but I'm not going to cut it open.
> >
> > Maybe I'll replace those 470K resistors with low noise film resistors... :D
> >
> > Admittedly it may be urban legend that the crystal cartridge was phased
> > out in later years but I have heard and read about it being so since
> > sometime in the late 70s. Another bit of lore is that you can "make it
> > sound better" by poking a pin hole in the diaphragm but I think all of us
> > here are smarter than that. Take it all for what it's worth.
> >
> >
> >
> >
> > Here's a reference that appears to be wrong based on catalog info:
> >
> >
> >
> > Some nice pics on this page:
> >
> >
> >
> > Does anyone remember seeing the D-104 on a short non-G stand (probably an
> > E-1 stand) used as a broadcast mic in the SciFi channel Battlestar
> > Galactica reboot?
> >
> >
> > 73
> >
> > -Jim
> > NU0C
> >
> > On Fri, 23 Feb 2024 12:48:05 -0800
> > "Richard Knoppow" <1oldlens1@...> wrote:
> >?
> > >? ? ?Astatic made another model the C-104 with a ceramic element. Very
> > > similar except the output is about 10db lower. This is for the element
> > > alone. If there is an amplifier the output levels are probably the same.
> > > I have not searched for a data sheet on the C-104.
> > >? ? ?Astatic made ceramic versions of many of their crystal mics and
> > > crystal phono pickups. The ceramic has the advantage of not being
> > > vulnerable to heat or moisture.
> > >
> > > On 2/23/2024 8:51 AM, Jim Shorney wrote:?
> > > >
> > > > My "secret" is to do away with the amplifier and replace it with a?
> > series 470K resistor. This is actually an old-timer's trick to mellow out
> > the frequency response of the D-104 head. The amplifier is enhanced
> > uselessness for our radios. It will happily drive just about any radio this
> > way and you get rid of a failure point (actually two if you consider
> > potential battery leakage). This works with any T-UGxx stand.?
> > > >
> > > > My understanding is that later D-104 heads used a ceramic cartridge.?
> > The same fix applies. The D-104 head likes to see a high impedance load,
> > the higher the better.?
> > > >
> > > > I have three T-UGxx variants that I have done this to and tested on?
> > the air with good reports. And they can be used with VOX.?
> > > >
> > > > 73
> > > >
> > > > -Jim
> > > > NU0C?
> > >?
> >
> >
> >
> > --
> >
> > 73
> >
> > -Jim
> > NU0C
> >
> >
> >
> >
> >
> >?
>
>
>
>
>



--

73

-Jim
NU0C