[HBR] Note on 1600-1700 kcs IF frequencies

[Peter Bertini]

I'd think using a balanced mixer and some IF traps would also help reduce
breakthrough problems. I know purists would frown upon doing so, but I'd
feel comfortable making improvements to a 60 year old design.

Pete

On Sun, May 16, 2010 at 4:59 PM, B Smith <smithab11 at comcast.net> wrote:

>
> When I built my HBR-14 last winter I used an IF of 1700 kcs due to a local
> broadcast
> station. 160 meter operations were fine but with a "birdie" at 1870KCs (IF
> plus 2X 85KC)
>
> breck k4che
>
>
>
>
>
>
> -------Original Message-------
>
> From: C Eus
> Date: 5/16/2010 4:07:40 PM
> To: hbr at mailman.qth.net
> Subject: [HBR] Note on 1600-1700 kcs IF frequencies
>
> In the past, I had voiced some concerns regarding possible QRM from AM
> broadcast radio stations operating in the region of our HBR IF frequencies.
>  http://en.wikipedia.org/wiki/Highway_advisory_radio
>
> Sure enough, as the above link points out, there are FCC set asides for
> Highway Advisory Radio, starting from 1610 kcs on up to 1700.  One may want
> to be aware of this.  My hope is that there isn't one around my neck of the
> woods that would cause a Q-R-Nancy.  If it gets too much of a problem, I
> can
> possibly see this phenomenon chasing us clear into the 160 meter band,
> which opens up a new can of worms, HI HI! 73 de Cal, N6KYR/4.
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>