In article ,
Ian Jackson wrote:

In message , Dave M
writes
On Thu, 05 Jul 2007 19:00:17 GMT, "Johnny Byrns"
wrote:

TerryJ wrote:

Capable of 100% modulation and has fairly good fidelity.

How do I tell if it uses AM or FM transmission signals? The diagram
shows nothing in reference to a FM or AM transmission bands.


For one thing, the audio input is fed directly to a transformer in the plate
circuit of the oscillator tube. Classic AM.
Next, the oscillator is fixed at 1 MHz by the crystal. No audio gets into
the
oscillator grid or cathode to FM it.

==============

Dave M

Never take a laxative and a sleeping pill at the same time!!

You would find it rather difficult to FM a crystal oscillator. Possible,
but difficult.
Ian.

Some of the early BBC FM transmitters did exactly that, FM a crystal
oscillator.


Regards,

John Byrns

--
Surf my web pages at, http://fmamradios.com/