[BC] AM Fidelity vs FM fidelity

[Robert Meuser]

That is easy to do into a dummy. I have built stations that were less 
than 3 db down at 50 kilohertz (316F). Most modern solid state 
transmitters have similar capabilities.The DX series used the 316F as a 
design target for frequency response and things have gotten even better 
since then. The problem is the system. Somewhere between 5 an 7 
kilohertz response is the maximum practical from a systems perspective. 
The rest is wasted power. Good engineering would dictate putting all the 
power into the receiver passband.

On 6/21/12 10:51 AM, Kevin Raper wrote:
> On Jun 21, 2012, at 10:26 AM, Robert Meuser wrote:
>
>> A long time ago I built a station to be the highest possible fidelity. We bought a very expensive professional receiver as an air monitor connected to a commercial AM loop antenna. We quickly learned that even10 kilohertz audio response from a 50 Kw station on a clear channel was not practical even though the studio was within the 100 MV/m contour.
> When WLW was on the 50 KW Cathanode Transmitter, Macintosh Labs in New York measured it as having Audio Frequency Response better than + - 1db from 20 Hz to 20 KHz Later they converted that transmitter to conventional Plate Modulation and it is still on site in Cold Standby.
>