Date   

Re: Test. New Group

Chris Moulding
 

I should be able to get all the existing messages on the Yahoo group moved to this new group in the next week or so..

There is a search facility on this group, Yahoo removed it on the other group as part of the "updates".

It was always useful to search through the posts as many problems had come up before and it was also invaluable when setup details were posted especially on non Windows systems.

Regards,

Chris


test post

TS-y
 


Re: Test. New Group

Nick G4IRX
 

It looks like an improvement on Yahoo Groups.


73

Nick.


SDR-4+ extending frequency coverage to 70.5 MHz in HDSDR

Chris Moulding
 

The default settings of the frequency control program used with HDSDR limit it to 40 MHz.

When you have HDSDR running with the receiver select the ExtIO button to the right of the Tune frequency display. This will open another program that is used to control the receiver frequency.
Select the Si570 tab. This will open a page showing some details of the Si570. At the top right is "Freq range". In the right hand window change the default setting to 300.
Click the "Hide" button.
Exit HDSDR to save the changes.
When you restart HDSDR you will be able to tune up to 70.5 MHz with the SDR-4+ receiver.

Regards,

Chris, G4HYG


Re: SDR-4+ setup for a Mac OS X

Chris Moulding
 

The Mac OS X setup came from Gary G0DNI.

Regards,

Chris G4HYG


Re: New Google group for Cross Country Wireless

"Jim G3OJI GMX Account" <g3oji@...>
 

Chris:

 

Thanks – its worked ok for me – now in the new group,

 

Jm G3OJI

 

From: cross_country_wireless@....uk [mailto:cross_country_wireless@...]
Sent: 21 November 2016 17:07
To: cross_country_wireless@...
Subject: [cross_country_wireless] New Google group for Cross Country Wireless

 

 

Many Yahoo users are having problems with Yahoo groups so I've opened a Google group for Cross Country Wireless. Trying to open a new topic for two days was the last straw for me.

 

Everyone on the current Yahoo group is invited to view and join the new group.

 

The link to the new group is:

 

Google Groups

Google Groups

Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

Preview by Yahoo

 

I've posted the update on the Sentry 5 transceiver on the new group.

 

Regards,

 

Chris G4HYG

No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7859 / Virus Database: 4664/13449 - Release Date: 11/21/16


SDR-4+ setup for a Mac OS X

Chris Moulding
 

This was a copy of a set-up of a SDR-4+ receiver on a Mac. It was pasted out another email so I've lost who sent it to me:
 
"Re: SDR-4+ and Mac OS X

SDR-4+ now up and running with DSP Radio V1.3.5(1)

Took a bit of head scratching, but got there in the end. This blog helped point
me in the right direction, but the settings are slightly different.

http://blog.marxy.org/2012/02/softrock-ensemble-rxtx-with-dsp-radio.html

When you plug the The SDR-4+ USB cables into the Mac, they show up as:

USB Audio Codec (0 in/2 out)
USB Audio Codec (2 in/0 out)

In the Mac Audio MIDI Setup, you heed to create a new Aggregate Device. Click
on the default name 'Aggregate Device' and rename it to something useful like
'SDR-4+'. From the list of devices that show in the new device, select (Use):

USB Audio Codec (2 in/ 0 out)
Built in output (0 in/2 out) - and tick the 'Drift Correction'

The clock Source should be USB Audio Codec and the sample rate 48000.0 Hz (Is
this correct?)

Run DSP Radio http://dl2sdr.homepage.t-online.de/

Show the DSP Radio Audio Devices window and scroll down to your new Aggregate
Device, if you renamed it, you won't have any trouble finding it! Tick the
Input and Output boxes.

Show the DSP Radio Configuration window and click the 'Add Configuration'
button. Click on the default New Configuration name and change it to SDR-4+

The Input I and Input Q are the feed channels from the SDR-4+ sound card. I've
set I to Input 0 and Q to 1 (not sure I've got these the right way around, more
testing required)

The Output I and Q are the Mac soundcard output channels. I've set I to 0 and Q
to 1 (not sure this makes any difference which way around they are?)

DSP radio doesn't have the easily available user options that Windows SDR
software has, but do play with the settings in the DSP Radio Configuration
window. I'm using the following settings:

AGC - On
Input Gain - 10
Output Gain - 10
S-Meter Gain - 1
Spectrum Gain - 0.3 (sets the waterfall contrast)
Epsilon and Alpha - 0 (no idea what these settings are!)

You can keep this Configuration window open whilst DSP Radio is running and play
with the settings to see the effect.

When you do run DSP Radio, don't forget to cycle up/down 10 Mhz or so to reset
the SDR-4+ filters otherwise you won't get anything.

Please bear in mind that some of my deductions are pure guesswork, so pleas e do
correct me if I've made any errors."


Regards,


Chris G4HYG


SDR-4+ frequency calibration using off-air signals

Chris Moulding
 

One of the problems with the Yahoo group is that we lost the facility to search through the posts. I'm going through my email to find some of the replies I sent to questions about the SDR-4+ receiver and other products.

When we test the SDR-4 the frequency calibration is checked against a GPS disciplined oscillator or on-air standard which has an accuracy measured in parts per billion. The calibration correction for the Si570 oscillator is stored in a microcontroller in the SDR-4.

If the correction data gets changed or corrupted then the Si570 reverts to a factory default figure which may be several kHz from the true value.

I've devised a method for SDR-4 users to check the calibration using off air frequency standard signals using HDSDR.

First connect the SDR-4 to the PC and an antenna. Open HDSDR and tune the LO to 10.010 MHz. In the UK a time signal beacon should appear on 9.996 MHz. This is the frequency of the frequency standard station RWM.

If the receiver is in calibration the time signal or morse transmission will be seen exactly on the 9996 kHz line on the waterfall.

If the frequency is offset by any significant amount then in the HDSDR program, left click on the ExtIO button just to the right of the Tune frequency display. Click on Open to start the program.

This will bring up the SoftRock Configuration Tool. Click on the Calibrate tab.

In this window enter the frequency that RWM appears on the waterfall in the Tuned box.

In the Real box enter the actual transmitted frequency of RWM (in this case 9.996 MHz.

Click Calibrate.

If the frequency was out by several kHz you may have to retune the receiver to 9.996 MHz to find RWM again. It should now be on frequency.

As a final check set the receiver to USB and put the red line in the centre display on 9.995 MHz so that RWM appears as a 1 kHz audio tone in the speakers. In the bottom waterfall RWM should be on the 1 kHz line. If not repeat the calibration process again to correct any small errors seen.

When the calibration process is completed click on Close on the SoftRock Calibration Tool and close it completely by clicking on the X at the top right hand corner.

I've suggested the use of RWM as it's usually a strong signal in the UK. Here's a link to a list of other frequency standard stations that may be used:

http://www.smeter.net/stations/hf-time-frequency.php

Regards and 73,

Chris, G4HYG 


Test. New Group

Jim <mail@...>
 

Test.


NNNN

73 de Jim


Re: : New Gtoups.io group for Cross Country Wireless

chrism@...
 

Thanks for that, Tony. All welcome, I'd like it to be like the early days of the Yahoo group where there were many posts covering a wide range of relevant topics.

The new Group.io group does offer some good features such as easy posting of photos and a few other features. I've left it as open to subscribers as possible with just the first email to the group being moderated to stop junk mail.

Apologies to Yahoo group members who joined the Google group. I thought it was a good option until Jim guided me to a better one.

Regards,

Chris G4HYG


Re: : New Gtoups.io group for Cross Country Wireless

swlistener.email@...
 

Hi Chris,
New group looks good, with some interesting extra features available too. I've posted the link to it to Twitter in case any of my audience are also CCW users
73
Tony


Update on Sentry 5 transceiver

Chris Moulding
 

Work on the Sentry 5 transceiver is progressing well.

It's been a long project as the hardware, firmware and the Sentinel SDR program have to work together.

The final tests of the prototype transceiver before final PCB design will be made this weekend operating during the CQ WW CW contest. I've used it over the last month on SSB and digital modes to fine tune the firmware and software and it's working very well with good audio reports.

The transceiver is nominally rated at 5W output but actually gives up to 8W from 160m to 10m with slightly reduced power on 6 and 4m. The receiver performance is excellent outclassing my collection of Icom HF transceivers.

Unlike other SDR transceivers the CW is generated directly as a keyed carrier without using the software on transmit. This allows it to transmit without any latency and can be keyed either as a straight key or by a keyer inside the transceiver firmware with the keyer speed controlled by a slider on the SDR software.

For the contest this weekend I will be using the N1MM+ contest logging software to generate the CW and key the transceiver as a straight key. I'll use CW Skimmer to directly tune the transceiver and help me decode the incoming signals. I need as much help as I can get with my CW skills! I'll also share the incoming CW spots via the Reverse Beacon Network.

Regards,

Chris G4HYG

--
Chris Moulding
Cross Country Wireless
7 Thirlmere Grove, Bolton, Lancs, BL4 0QB, UK
Tel/fax: +44(0)1204 410626
Mob/workshop: +44(0)7752 391908
Secure email: g4hyg@protonmail.com
Website: http://www.crosscountrywireless.net
Yahoo group: http://uk.groups.yahoo.com/group/cross_country_wireless/


New Gtoups.io group for Cross Country Wireless

chrism@...
 

Rather than use a Google group to replace the Yahoo group I've taken the advice to use Groups.io instead.


The new group address follows:


CrossCountryWireless Groups.io Group


I'll look at sending a message out to existing Yahoo group users with invitation to join the new group.


Regards,


Chris G4HYG


Re: : Re: New Google group for Cross Country Wireless

chrism@...
 

Thanks for letting me know about Groups.io. From a quick look at it it I can see a tool to help migrate Yahoo groups.

I'll investigate further and send out another Yahoo post if it looks the better option.

Regards,

Chris G4HYG


Re: New Google group for Cross Country Wireless

Jim <mail@...>
 

On 21/11/2016 17:06, chrism@... [cross_country_wireless] wrote:

Many Yahoo users are having problems with Yahoo groups so I've opened a Google
group for Cross Country Wireless. Trying to open a new topic for two days was
the last straw for me.
Groups.io would have been a better idea. Works exactly like Yahoo! Groups and would've
kept us out of Google's clutches.

73, Jim


New Google group for Cross Country Wireless

chrism@...
 

Many Yahoo users are having problems with Yahoo groups so I've opened a Google group for Cross Country Wireless. Trying to open a new topic for two days was the last straw for me.


Everyone on the current Yahoo group is invited to view and join the new group.


The link to the new group is:


Google Groups


I've posted the update on the Sentry 5 transceiver on the new group.


Regards,


Chris G4HYG


New Google group for Cross Country Wireless

chrism@...
 

Many Yahoo users are having problems with Yahoo groups so I've opened a Google group for Cross Country Wireless. Trying to open a new topic for two days was the last straw for me.


Everyone on the current Yahoo group is invited to view and join the new group.


The link to the new group is:


Google Groups


I've posted the update on the Sentry 5 transceiver on the new group.


Regards,


Chris G4HYG


Re: MFSK16

"Stephen H. Smith" <wa8lmf@...>
 

On 11/2/2016 12:21 PM, 2wr796@... [cross_country_wireless] wrote:
 

What is the exact dial frequency using mfsk16 USB

TNX

POB/K8LEN



It depends on what AUDIO tone center frequency you use.    See the discussion of this issue on my website at:

  

The short form: 

If you have APRS Messenger set to use the default 2100 Hz audio tone center frequency for PSK63/MFSK16, etc, then your radio should be set to 10.147.600 MHz USB .    

This radio "dial" frequency will also make classic AX.25 300-baud packet APRS come out on the correct RF tone pair, assuming your TNC or soundcard software generates the common 1600/1800 Hz audio tone pair.  (The Kantronics KAM, the TNC2/MFJ127x in HF mode, the UZ7HO Soundmodem, and the TinyTrak III among others use this tone pair.    PK-232s and the free version of AGWpe DO NOT.) 


Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
Home Page:          http://wa8lmf.net

 _______ Windows 10 Outrages! _______
  

Live Off-The-Air APRS Activity Maps
  

Long-Range APRS on 30 Meters HF
  


Re: ROBUST PACKET

"Stephen H. Smith" <wa8lmf@...>
 

On 11/1/2016 8:45 PM, 2wr796@... [cross_country_wireless] wrote:
 

Anyway we can integrate robust packet tnc  to cross country, sure would shall we say...great....

Anybody ever pick up my beacon , let me know.

73


POB/K8LEN



A TNC for the proprietary "robust packet" could easily be used as the second TNC option in APRS Messenger.    However, "robust packet" is a proprietary protocol only available in the extremely expensive SCS TNCs and Pactor III hardware modems.  Because it IS proprietary, there is no soundcard "soft TNC" available for the mode.

Because of this, there has been very little uptake of the format among hams.   (APRS Messenger digimodes and classic AX.25 packet can be done on any sound card equipped PC for the low low price of FREE.)  As far as I know, the main users of the robust packet protocol are well-healed boaters using it to access mail box systems while at sea.   I am not aware of any APRS usage of robust packet.


Stephen H. Smith    wa8lmf (at) aol.com
Skype:        WA8LMF
EchoLink:  Node #  14400  [Think bottom of the 2-meter band]
Home Page:          http://wa8lmf.net

 _______ Windows 10 Outrages! _______
  

Live Off-The-Air APRS Activity Maps
  

Long-Range APRS on 30 Meters HF
  


Re: : Broadband active antenna

chrism@...
 

I've added a link on the web page to a scanned copy of the Radio User magazine review of the Broadband Active Antenna in January 2015.

The web page is:

 

The review is of an early version of the antenna. The latest antennas use a different antenna element with higher gain at UHF than the original.

Regards,

Chris

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