Topband: eliminating radio hum/hiss

[jbattin]

The Bencher SCAF filter was designed specifically as a hiss filter and it
works.
John K9dx
----- Original Message -----
From: "GALE STEWARD" <k3nd at yahoo.com>
To: "Martin" <dl1iaq at gdxf.de>; "topband reflector" <topband at contesting.com>
Sent: Thursday, February 05, 2004 7:05 AM
Subject: Re: Topband: eliminating radio hum/hiss


> I have used an external, passive audio filter (from a
> W3NQN QST article) for years on various radios and now
> on my 850. It uses a bandpass audio filter to roll off
> low frequencies below 300hz (eliminates hum) and above
> 2500hz (eliminates hiss). I've used them for years and
> wouldn't be without them. I have 3-4 of them, one on
> each of the different radios. I can post the magazine
> issues that contain the information if there is any
> interest (I can go through my files tonight).
>
> 73, Stew K3ND
>
>
> --- Martin <dl1iaq at gdxf.de> wrote:
> > Hello topbanders,
> > i am very surprised to read that obviously nobody
> > uses that "cheap
> > clean radio" on topband. I use a TS-850 for over 10
> > Years now and
> > wouldn´t want to give it away. I never had
> > complaints about clicks on any
> > band. I´am not a big gun, (a little pistol, that
> > is), so you all don´t
> > know me.
> > But listening on topband with this radio is a
> > pleasure.
> > There are two things that nag me:
> >  1. the noise-blanker is no good (there is a fix at
> > www.mods.dk).
> >  2. the receiver hisses when no sig present, but
> > that is
> >  something you only know if you have ever listened
> > to a K2 with the
> >  KAF2 installed or radios that have DSP.
> >
> >  I am looking for a fix for that hiss.
> >
> > Has somebody ever compared the TS-850-RX to other
> > radios on 160?
> >
> > Rig: TS-850S, 400hz-Inrad-Filters in both IFs
> > Ant: Inv-Vee Trap-Dipole (length 66m) for 160/80m,
> > up 17m at feedpiont, sloping down to
> > 8m.
> >
> > 73, Martin
> > DL1iAQ
> > K2 #2706
> >
> > ----- Original Message -----
> > From: "Tom Rauch" <w8ji at contesting.com>
> > To: <Topband at contesting.com>
> > Sent: Wednesday, February 04, 2004 5:51 AM
> > Subject: Topband: Omni 6 Plus
> >
> >
> > > I had a chance to observe something interesting
> > last night. A wide
> > clicking
> > > signal suddenly became click-free.
> > >
> > > The operator e-mailed me and said he exchanged his
> > Omni-6 plus for a
> > TS-850.
> > > The change was pretty dramatic. He went from about
> > 3kHz wide with S9
> > clicks
> > > down to no clicks at all!
> > >
> > > The important point is there apparently are some
> > very clean cheap radios
> > out
> > > there. It would be interesting to learn the models
> > of *good* radios and
> > make
> > > that info available. If any has that info, please
> > e-mail it to me.
> > >
> > > 73, Tom W8JI
> > >
> >
> >
> >
> >
> >
> > --
> > Mit freundlichen Grüssen
> >
> > Martin                 mailto:dl1iaq at gdxf.de
> >
> >
> > _______________________________________________
> > Topband mailing list
> > Topband at contesting.com
> > http://lists.contesting.com/mailman/listinfo/topband
>
>
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