[Milsurplus] ?? re DU-1 df

[Brooke Clarke]

Hi Hue:

This is just an opinion, I have no personal experience with using the DU-1 although I have one.

Vacuum tube receivers made use of a number of tuned circuits starting with the RF front end.  This has the effect of reducing the
blocking effect of signals that are reasonably far from the tuned frequency.  Modern solid state receivers typically have no tuned
circuits until the IF filtering, they are "wide open" and so suffer much more from a strong signal far from the received frequency.
It's my understanding that in Europe this is much more of a problem than in the U.S. and to cope with that preselector filtering is
added to HF radios.

73,

Brooke Clarke, N6GCE
http://www.prc68.com


> From: "Hue Miller" <kargo_cult@msn.com>
> To: <milsurplus@mailman.qth.net>
> Date: Wed, 5 Feb 2003 00:08:00 -0800
> Subject: [Milsurplus] ?? re DU-1 df
>
> Okay, i gotta try this again.
>
> Suppose on a large plane, someone is using the DU-1 direction loop and its
> own dedicated receiver.
> Now if the Liaison transmitter is fired up, will it override or block the DU,
> if the DU is on a lower frequency, like BC band?
> Thanks- Hue
>
> --__--__--