[amsat-bb] Re: L/U Mode USB
k0vty at juno.com
Fri Dec 8 21:07:24 PST 2006
>From someone I respect when I hear his words about operating L mode,
finding QRN on the down link , I have to ask if there is something new
causing the interference ?
Thanks for your efforts with AO-51 Clair
On Fri, 8 Dec 2006 21:38:00 -0500 "Clare Fowler" <lcfowler at magma.ca>
> That was me VE3NPC. At 01:16 I completed a QSO with
> Ed N8BBQ. He was the only readable signal other than
> myself I could copy. There were several that were very week/
> >From this QSO and my previous experinece on 3 L(ssb)/S(fm)
> passes I have the following observations.
> 1. With my approx 1500 watts ERP on L I can only get into
> AO-51 with a good signal when it is above about 30 degrees
> elevation wich corresponds to a range of about 1200 kilometers.
> 2. The receiver seems to have a definite threshold below which
> the signal comming back wanders around.
> 3. We have a problem on L band. On the L//S mode there was
> strong random impulse QRN which I concluded was local
> LAN. However the same strong impulse signals were on
> the U downlink. The L band ssb receiver is responding to
> some very strong impulse signals over Eastern NA. This QRN
> was not there for AO-40. This implies that the Eagle
> team should have some sort of Noise Blanker on board.
> Clare VE3NPC
> ----- Original Message -----
> From: "snyderb" <snyderb at cox.net>
> To: <amsat-bb at amsat.org>
> Sent: Friday, December 08, 2006 8:28 PM
> Subject: [amsat-bb] L/U Mode USB
> > BB
> > This mode is a challange. During overhead pass up the east coast
> > evening I could barely hear I believe call sign ending in NPC
> calling on
> > the 70cm D/L. I replied but don't know if anyone could hear me.
> > Any other reports from the BB on this mode.
> > 73 Bruce KG4YEV
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