I think you want menu 34 and adjust between 400 and 1000 hz.
73, Steve KW3A
On 3/9/2014 2:54 PM, Jim Gammon wrote:
> Have no idea if you can adjust the side tone on the Kenwood
> TS480. Anyone here know about that? Jim WA6EKS
>
> ----- Original Message -----
> From: Lou Kolb <[log in to unmask]
> To: [log in to unmask]
> Date sent: Sun, 9 Mar 2014 09:40:52 -0400
> Subject: Re: 4WeWhoDoCW,AGudRtikl;dd:Zero beating, what is it,
> how do we do it and why should we do itf, By N3EF
>
> Danny,
>
> Great article on something that has long been a pet peev of mine.
> Most ops
> probably don't even know where they have to tune a signal for it
> to be
> exactly zero-beat with the other station. They just tune to a
> pitch they
> like which may or may not be right on frequency. The K3 sidetone
> tracks the
> transmitter offset frequency so its extremely easy to zerobeat.
> You just
> choose a sidetone you like and make sure your receiver matches it
> when you
> tune in a signal and you're good to go. I think several newer
> transceivers
> are set up like this but for far too long it was harder than it
> should've
> been to zero-beat on CW.
> Lou Kolb
> Voice-over Artist:
> Radio/TV Ads, Video narrations
> Messages On-hold:
> www.loukolb.com
> ----- Original Message -----
> From: "Dan B Dyer Jr,/Danny" <[log in to unmask]
> To: <[log in to unmask]
> Sent: Sunday, March 09, 2014 8:03 AM
> Subject: 4WeWhoDoCW,AGudRtikl;dd:Zero beating, what is it, how do
> we do it
> and why should we do itf, By N3EF
>
>
> Found this referenced on the QRPL list, and thought it a good
> simple, wake
> up call-reminder, and one which will cause me to make sure my
> side tone is
> set as required. HTH, Wb4idu.
> Zero beating, what is it, how do we do it and why should we do
> it
>
> By N3EF
> First, lets define what zero beating is in general. Zero beat
> is the
> condition reached during a measurement or calibration when the
> beat
> frequency between two input signals is no longer detectable.
> And the beat
> frequency is the frequency produced when two signals are mixed
> or
> combined.
> The beat frequency equals the difference or offset between the
> two
> frequencies. In cw, we are using two audio frequencies to do
> this. One
> frequency is your sidetone and the other is the pitch of the
> received cw
> signal which changes as you adjust the tuning dial. In reality,
> we are not
> listening for the beat frequency. We are listening for the
> sound of the
> two
> signals going in and out of phase with each other as the two
> frequencies
> get
> close to each other. The two frequencies are so close, you can
> barely tell
> the difference between them, but you can hear a change in
> intensity as
> they
> go in and out of phase with each other adding and subtracting in
> level. It
> is a "wow...wow...wow.." sound that gets slower and slower as
> the two
> signals get closer and closer in frequency. It is more
> pronounced if the
> two
> signal levels are the same so you may need to adjust your volume
> and/or
> sidetone level. It is easier to hear the "wow...wow" sound when
> listening
> to
> two steady tones, but you can also detect it with one steady
> tone and one
> switching on and off such as cw morse code. Once you get the
> hang of it,
> it
> becomes second nature and you can do it very quickly. Here is
> the sound of
> two steady tones of around 750hz that start out at 50 cycles
> apart and
> gradually get closer until they are identical in frequency. The
> sound of
> the
> two frequencies going in and out of phase with each other is
> very
> distinctive. wowwow.mp3 And here is what it sounds like when
> receiving a
> cw signal as I tune above and below his frequency. You can
> clearly hear
> the
> distinctive sound made when the two frequencies are at or very
> near each
> other. They start out with just the received cw and then you
> hear my
> sidetone come on. zerobeat.mp3, zerobeat1.mp3, zerobeat2.mp3.
> Now, some of the old timers will tell you that this isn't "real"
> zero-beating. They will tell you that zero-beating is the way
> we use to do
> it when we had separate transmitters and receivers. Well, they
> are wrong
> in
> telling you that. The way they did it was just another way of
> getting your
> transmit frequency the same as the one you are receiving and was
> also
> known
> as zero-beating. The way we do it now is different, but it is
> still
> zero-beating.
> So why should we zero-beat anyway? Well, if we don't, then we
> are
> transmitting on two different frequencies and using more
> bandwidth than
> necessary. You may be QRM'ing another nearby station. The
> other op may not
> like the pitch of the tones he hears and must use his RIT to
> change it.
> The
> other op may be using a narrow filter and not even hear your
> reply. I
> recently operated with a special event callsign during the
> Straight Key
> Century Club's first anniversary special event. There were
> operators from
> each call district using the same callsign appended with their
> respective
> call district. I was calling CQ 1Kz away from another SKCC
> operator.
> People
> answering just threw out their callsign without indicating who
> they were
> responding to. This is normal and acceptable as a response but
> some of
> them
> were 500Hz off frequency directly between us...so who were they
> responding
> to? And what about the QRM they were causing because they didn't
> take the
> time and effort to zero-beat. There was no big pile-up going on
> here as it
> is an often used tactic to be heard when there IS a pile-up. I
> was amazed
> at
> how many stations were calling me so far off frequency. Some
> people don't
> know what zero-beating is, some do but don't know how to do it,
> and some
> know how but think it is totally unecessary. You don't have to
> spend a lot
> of time and be exactly on frequency, but you should try to get
> close.
> There
> are many aspects of working CW that mark you as a good operator.
> I think
> zero-beating is one of them.
> There are other ways to zero-beat the other station. If your
> rig has a
> cw-reverse mode, you can just switch back and forth from cw to
> cw-reverse
> and adjust your dial until the tone sounds the same in each
> mode. You can
> tune until you think your close and then turn on a narrow filter
> and tune
> for max signal level. Some rigs like the Yaesu FT-897 have a
> zero-beat
> indicator lamp. There are also zero-beat indicator kits that
> you can adapt
> to your rig. If you have an audio output to your computer you
> can use one
> of
> several programs available to do it via your soundcard.
> One other thing you need to be aware of is that some rigs have
> an
> adjustable
> sidetone pitch that does not track the rigs transmit offset. If
> you change
> the sidetone pitch, you can't use it to zero-beat properly.
> I hope this article and sound files have been of help and I hope
> you
> consider zero-beating an important part of your operating
> practices.
> Long live CW!
>
>
>
|