eHam

eHam Forums => Misc => Topic started by: K9BHP on December 06, 2014, 06:22:49 PM



Title: FM Simplex frequencies ...
Post by: K9BHP on December 06, 2014, 06:22:49 PM
Hi
29.600 seems to be the calling frequency for FM Simplex.
Since I do not want to block the calling frequency, would it be OK to QSY to 29.290, below 29.300 which seems to be the calling frequency for Japan in FM.
Which frequency's can I go to for a FM QSO that are in accordance with the current band plan?
Thank you

Ben, K9BHP


Title: RE: FM Simplex frequencies ...
Post by: KD0SFY on December 06, 2014, 06:50:36 PM
Start with http://www.arrl.org/files/file/Regulatory/Band%20Chart/Hambands_color.pdf 

Then, overlay http://www.arrl.org/band-plan 

If the frequency is not specified for something else in the band-plan (second link), but falls in the "phone" section of the radio band (first link), then technically you should be OK. 


Title: RE: FM Simplex frequencies ...
Post by: K9BHP on December 06, 2014, 06:54:52 PM
I don't get it, can I or can I NOT use the 29.290 for Simplex FM QSO's.
And what about this:

28.300-29.300   Phone
29.300-29.510   Satellite Downlinks

What now?

Ben


Title: RE: FM Simplex frequencies ...
Post by: KB4QAA on December 06, 2014, 08:16:13 PM
Well, no mode is listed for 29.200-29.300, so I suppose it is available.  I would probably chose to move to 'repeater outputs' so that I wouldn't interfere with repeaters themselves but still be in the FM area.  *Shrug*


Title: RE: FM Simplex frequencies ...
Post by: K9BHP on December 06, 2014, 08:21:03 PM
I would probably chose to move to 'repeater outputs' so that I wouldn't interfere with repeaters themselves but still be in the FM area.  *Shrug*

Are you serious? You are suggesting to move to a repeater output frequency to continue my Simplex QSO? You got to be kidding...

Ben, K9BHP


Title: RE: FM Simplex frequencies ...
Post by: AA4HA on December 07, 2014, 07:46:51 AM
Close to is not the same thing as "being on" a repeater output frequency.

We do not live in a channelized world, You could be 10-20 KHz away from the repeater output frequency and still be fine.

There is no rule that says you must be on some specific frequency in a simplex band. You can be anywhere in there, with any frequency you want. For example;

There are two FM simplex allotments;

146.400 - 146.580      This is 180 kHz of spectrum, put in any number you want in there
147.420 - 147.570      This is 150 kHz of spectrum, put in any number you want in there

Even if you decided to treat it as "channelized" and keep everything nice and tidy, 10 kHz apart with 5 kHz from the allotment edge, there are 21 spots in those two tiny chunks of spectrum.

This is about good practice, nobody is going to show up with a ruler and smack you on the fingers if you put something else in there.


Title: RE: FM Simplex frequencies ...
Post by: K9BHP on December 07, 2014, 09:29:08 AM
I am talking about the 10m band, not 2.
Ben


Title: RE: FM Simplex frequencies ...
Post by: W8JX on December 07, 2014, 10:19:36 AM

There are two FM simplex allotments;

146.400 - 146.580      This is 180 kHz of spectrum, put in any number you want in there
147.420 - 147.570      This is 150 kHz of spectrum, put in any number you want in there

Even if you decided to treat it as "channelized" and keep everything nice and tidy, 10 kHz apart with 5 kHz from the allotment edge, there are 21 spots in those two tiny chunks of spectrum.


You can potentially double channels with NFM (2.5kc narrow FM)


Title: RE: FM Simplex frequencies ...
Post by: K9BHP on December 07, 2014, 11:14:07 AM
Thank you for your input.
I appreciate all your help.
73
Ben


Title: RE: FM Simplex frequencies ...
Post by: W7TX on December 07, 2014, 12:27:04 PM
29.290 is fine. You can operate fm above 29.000.  I usually operate simplex fm between .300 (ja calling) and .500, but have had dx qso's below .300. Just yesterday I had an fm qso with a ja on 29.100.  I was calling in am but he answered me in fm so I switched.  If the frequency is clear your good.  29.600 can be a mess so 29.500 is a good 2nd choice of cq.  Don't operate simplex on the repeater outputs, inputs or in between them.  I usually stay 20 Khz from other active frequencies or band edges when on fm. Enjoy fm and get off 29.6.  Plenty of room for everyone.  Am ops usually show up around 29.0 to 29.3, but I hear fm in there from time to time.  Usually dx. 


Title: RE: FM Simplex frequencies ...
Post by: K9BHP on December 07, 2014, 01:54:20 PM
From 29.300 MHz to 29.510 MHz the satellite sub band allows amateur radio operators to communicate with orbiting OSCARs.


Title: RE: FM Simplex frequencies ...
Post by: W7TX on December 07, 2014, 02:25:08 PM
From 29.300 MHz to 29.510 MHz the satellite sub band allows amateur radio operators to communicate with orbiting OSCARs.
  Is that why you picked 29.290?  Since your quoting the internet for your info, here is another for you from wiki:

"29.300 MHz is a common frequency to find JA hams on. British hams commonly use the 29.400 to 29.500 MHz band for FM as well with 29.400, 29.450, and 29.500 MHz being common. USA hams can be found on FM anywhere above 29.000 MHz, commonly on the above frequencies talking to overseas hams. 29.200 to 29.300 MHz is set aside in some area band plans for FM Simplex use."  And I'll add one 29.480 is sometimes active with dv.


Title: RE: FM Simplex frequencies ...
Post by: KB4QAA on December 09, 2014, 12:24:54 PM
comment removed for use on another topic.  ;)


Title: RE: FM Simplex frequencies ...
Post by: K9IUQ on December 09, 2014, 01:55:20 PM
Hi
29.600 seems to be the calling frequency for FM Simplex.
Since I do not want to block the calling frequency, would it be OK to QSY to 29.290, below 29.300 which seems to be the calling frequency for Japan in FM.
Which frequency's can I go to for a FM QSO that are in accordance with the current band plan?
Thank you

Ben, K9BHP

I believe many of the replies you got are from hams do not use 10M FM. There is a fair amount of FM from Europe on 29.290 AND 29.300. I have worked EU hams on both freqs recently, Ragchew type QSOes. I have also heard JA's calling on 29.300 but not recently. I believe 29.300 is JA calling freq. Also I have run across many conversations on FM below 29.290. I use a panafall and signals are easy to catch without a lot of tuning around.

There does seem to be a lot of confusion on what freq to use for ragchews on 10 FM. Many call on 29.6 and continue on with a QSO. In fact I worked S01WS on 29.6 FM a couple of days ago for a nice 10 minute chat. Many hams QSY after contact on 29.6. some to 29.590. S01WS called the CQ and he wanted to stay on 29.6.  Since it is legal to transmit FM on 10m especially above 29.0 I would just call anyone who I want a conversation with, no matter the freq. I would stay out of the repeater input freqs unless you want to cause frustration...

Also do NOT use NFM as I have never run across anyone on 10m FM using it.

Stan K9IUQ


Title: RE: FM Simplex frequencies ...
Post by: K9IUQ on December 09, 2014, 02:26:24 PM
nobody is going to show up with a ruler and smack you on the fingers if you put something else in there.

Tisha dear, I believe someone needs to smack you with a ruler. Did you even read the original post?
Did he ask about 2 meter FM? Have you EVER operated on 10 FM or are you just trying to be a know it all like W8JX??

Stan K9IUQ


Title: RE: FM Simplex frequencies ...
Post by: N0YXB on December 10, 2014, 09:03:52 AM
It's has to be an oversight.  Tisha is one of the stars of eHAM and is a voice of experience and knowledge.  JX, well where would he be without Google?


Title: RE: FM Simplex frequencies ...
Post by: SMAUG on December 15, 2014, 11:24:38 AM
According to the link posted earler (http://www.arrl.org/band-plan) 29.600 seems to be the US calling frequency for 10m. Have you tried that?

Ben, some of your replies to people who are trying to help you were pretty rude. Keep that up, and no one will help you.