Brian Denley wrote:

dxAce wrote:


No real benefit compared to sideband selectable sync, other than the
fact that you have sync. Take for example the R8 and R8A, they both
have sync on both sidebands at once, compared to the better sideband
selectable sync on the R8B.

Drake advertises the R8 and R8A as having 'sideband selectable sync' but you
have to use the passband offset to select one side or the other. Certainly
not as good as the R8B detector. Interestingly the RX-350 (and some other
receivers) give you the choice of both sides, lsb or usb. I guess if there
is no adjacent interference, the 'both' choice is OK but I still don't see
what the benefit is over a choosing the sync with one sideband.

Go back and read it again.



--
Brian Denley
http://home.comcast.net/~b.denley/index.html

Brian Denley wrote:
dxAce wrote:


No real benefit compared to sideband selectable sync, other than the
fact that you have sync. Take for example the R8 and R8A, they both
have sync on both sidebands at once, compared to the better sideband
selectable sync on the R8B.


Drake advertises the R8 and R8A as having 'sideband selectable sync' but you
have to use the passband offset to select one side or the other. Certainly
not as good as the R8B detector. Interestingly the RX-350 (and some other
receivers) give you the choice of both sides, lsb or usb. I guess if there
is no adjacent interference, the 'both' choice is OK but I still don't see
what the benefit is over a choosing the sync with one sideband.


Simple, it is easier to implement and cheaper.

Well, I did say I wouldn't buy a *new* receiver that lacked sync
detection, but that's not to say that there aren't lots of older
receivers (like the Drake R7) that are worth acquiring. If I saw a good
deal on an R7, I'd be tempted. However, if I were buying a brand
spanking new receiver, I would not consider buying one without sync
detection. Especially in the case of tabletops, there's simply *no
excuse* for them not to have sync detection now. It'd be like buying a
new Mercedes sedan that lacks power steering.

Steve

Michael Lawson wrote:

"dxAce" wrote in message
...


wrote:

Others have told me about how sync detection is so dispensible,
but my
own ears say otherwise. So who am I supposed to believe....the
aforementioned people or my own ears?

In this day and age, I personally wouldn't buy a new receiver that
lacked sync detection.

I'd still take a nice Drake R7 that does not have sync any old
day... I'd out dx
you in most any situation!

Ace, you said you used to have an R-5000. How'd that
stack up against your current complement of receivers?
I was curious considering your R7 comment above.

It was a nice receiver, and it had decent audio. I'm not sure what you mean
about my comment regarding the R7.

dxAce
Michigan
USA

wrote in message
oups.com...
Most radios have a bit higher distortion when using sync, plus there is
always going to be a slight frequency offset. Some radios will growl
trying to get the sycn. Throw the audio out on a spectrum analyzer and
you might spot a weak tone artifact due to the sync. Use it when it
sounds better, otherwise leave it off.

Sometimes there is more noise "under" one sideband than the other, so
you might use sync and pick the quieter sideband. Adjacent channel
splatter would be a good example of noise under one sideband and not
the other.

I probably use sync a few percent of the time.


I still don't under why Lowe used even implemented double sideband sync in
the HF-150 if it doesn't do anything over single sync. Why add this feature?
For what kind of scenerios??

Lucky

Lucky wrote:

wrote in message
oups.com...
Most radios have a bit higher distortion when using sync, plus there is
always going to be a slight frequency offset. Some radios will growl
trying to get the sycn. Throw the audio out on a spectrum analyzer and
you might spot a weak tone artifact due to the sync. Use it when it
sounds better, otherwise leave it off.

Sometimes there is more noise "under" one sideband than the other, so
you might use sync and pick the quieter sideband. Adjacent channel
splatter would be a good example of noise under one sideband and not
the other.

I probably use sync a few percent of the time.


I still don't under why Lowe used even implemented double sideband sync in
the HF-150 if it doesn't do anything over single sync. Why add this feature?
For what kind of scenerios??

In essence though, isn't it single sync anyway? Versus the selectable sideband
sync that is in the R8B?

Can you choose which sideband you will use the sync in on the HF-150?

dxAce
Michigan
USA

"dxAce" wrote in message
...


Lucky wrote:

wrote in message
oups.com...
Most radios have a bit higher distortion when using sync, plus there is
always going to be a slight frequency offset. Some radios will growl
trying to get the sycn. Throw the audio out on a spectrum analyzer and
you might spot a weak tone artifact due to the sync. Use it when it
sounds better, otherwise leave it off.

Sometimes there is more noise "under" one sideband than the other, so
you might use sync and pick the quieter sideband. Adjacent channel
splatter would be a good example of noise under one sideband and not
the other.

I probably use sync a few percent of the time.


I still don't under why Lowe used even implemented double sideband sync
in
the HF-150 if it doesn't do anything over single sync. Why add this
feature?
For what kind of scenerios??

In essence though, isn't it single sync anyway? Versus the selectable
sideband
sync that is in the R8B?

Can you choose which sideband you will use the sync in on the HF-150?

dxAce
Michigan
USA



Not in double sideband mode. But you can choose between USB and LSB sync
separately.

Lucky

In article .com,
wrote:

Most radios have a bit higher distortion when using sync, plus there
is always going to be a slight frequency offset. Some radios will
growl trying to get the sycn. Throw the audio out on a spectrum
analyzer and you might spot a weak tone artifact due to the sync. Use
it when it sounds better, otherwise leave it off.

Sometimes there is more noise "under" one sideband than the other, so
you might use sync and pick the quieter sideband. Adjacent channel
splatter would be a good example of noise under one sideband and not
the other.

I probably use sync a few percent of the time.

I don't own an audio spectrum analyzer so I'll have to stick to my
ears. Using my ears I don't notice any additional distortion from using
the sync. I own four different makes of radios that have sync and have
not noticed the additional distortion of which you speak. The default
for me is to leave it on. Usually I only turn it off for band scanning
or seeking because I don't want to wait for it to lock.

Sounds like your radio needs adjustment or you are just hearing an
interfering signals heterodyne made apparent by the injected carrier.

--
Telamon
Ventura, California

It takes a good ear to hear a tone 40db down. You need to listen for
it.

In article .com,
wrote:

It takes a good ear to hear a tone 40db down. You need to listen for
it.

40dB down? Then who cares since you are not going to hear it.

--
Telamon
Ventura, California