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Hermes in motion

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 Finally got a few minutes to put together my new SDR radio. I collected the TAPR Hermes Transceiver board mid week http://openhpsdr.org/hermes.php. The PA and enclosure are  from Apache labs https://apache-labs.com/ and had been here for a while. To Interface them together 2 connectors have to be soldered, a resistor removed and a couple of cables hooked up. It is a bit crowded in the box!

Hermes Transceiver board

Apache Labs PA and Filter board


Anan-10 Front Panel
Anan-10 Rear Panel



As can be seen it can select 3 antennas, an ethernet interface to the outside world (can be GIGE), can be locked to GPS, has a low level transverter output operates 10kHz to 55MHz and produces around 15W

It arrived with V1.8 software but I upgraded it, through the ethernet port to version 2.0 which was released a couple of hours earlier

I hooked it up to the W5WC dual receiver version of Power SDR which allowed monitoring of 500kHz and 40m as can be seen from the following:-


There is software available that allows monitoring 160/80/40/20/15/10 all at the same time with panoramic displays for each although you cant listen to all at the same time

VK6APH has also created software to use the device as a 55MHz VNA allowing transmission/reflection to be measured and displayed as a graph or a smith chart




Beaglebone Black

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Having tried using the Raspberry Pi for digital mode decoding and realised that lack of speed was an issue, I started looking at the beaglebone board that I was looking at for another application. Unfortunately it's biggest drawback for me was that the beaglebone does not have a video output.

I was very interested to discover that there is an upcoming Beaglebone Black board which has many extra features that the beaglebone board does not have. It has :-






  • USB client for power & debug
  • USB host
  • Ethernet
  • HDMI
  • 2x 46 pin headers
  • serial port (rather than via USB)
  • user LEDS
It also supports Ubuntu and Android

Searching around the distributors I found none had them in stock but Mouser supposedly had some coming in may 2 so one was ordered




GW4FRE/P hits the airwaves for 1296UKAC

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Before going to Wales to help Roger GW5NF fix his HF beam I discovered that there was a 1296MHz activity contest on April 16. I had the Elecraft K3 as a 144MHz  IF,  the DEMI Xverter and a 23 ele F9FT. All I needed was a mast that would fit in the Honda Jazz and GW4FRE/p could be QRV.

Roger dug out the multisection mast that he used on the Backpackers contest and managed to make some guy posts, the originals having gone missing and activity was possible

The Jazz had never been used portable so how to hook up the gear to the battery was a challenge. The cigar lighter fuse wasnt rated high enough. In the end a set of jump leads was connected. The battery at one end (using a rat poison tub to prop the bonnet open so the positive terminal didnt short out). The other end stopped outside the drivers door and the lead for the k3 and the transverter were connected to the croc clips, insulated with a plastic bag and lots of electrical tape. It worked well, the K3 voltmeter only dropping 0.5V with a loud whistle

As it was a nice clear night the Blorenge was visited in IO81LS. The summit has a good takeoff all around but not practical for a 2000-2230 contest so the car park was used. This is great to the East but obstructed to the North by the summit

Setting up before the contest, 5 beacons were heard, GB3MHL, GB3DUN, GB3USK GB3CLE and GB3MCB all at reasonable strength. The best DX PA0EHG at 527km was worked early on and a total of 32 stations were worked, not bad for 10W and a single antenna at 15'. It was noticable that only two stations were worked to the west, one of them only just!



 The DVR on the K3 sure earned its keep, especially in the very boring last 30 minutes when conditions had gone downhill.

Beaglebone black is here

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As promised, I got an email from Mouser on May 1 saying the Beaglebone black board had been despatched. It arrived may 2 and looks nicely made, apart from the (yellow) RT1 component standing 12mm off the board with the resultant risk of shorting out on the ethernet connector

Following the instructions at http://beagleboard.org/Getting%20Started I updated the software. Its slightly different from the rpi. You put an image on the microsdhc card, plug it into the BBB,  reboot it and it installs it onto the BBB (40 minutes). You remove the card, reboot and off you go. You dont need the card inserted to run the OS. It all came up nicely with the mouse and keyboard on the powered USB hub but connecting to the internet via the WNCE2001 access point or the wifi dongle from the RPI did not succeed after many attempts so no radio software currently installed

I have noticed there is a UBUNTU image for the BBB which I want to have a try with as I have had more experience with that than the supplied BBB OS


Visit to Mouser Electronics

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The last few days I have been working on the replacement w5hn 50MHz beacon. Testing the N1JEZ board showed i needed a replacement Fox 10MHz Crystal oscillator, which I needed to get from Mouser Electronics. I was going to get it shipped, then I thought "its a nice day let me go and get it". By nice (for Dallas) i mean i was not going to roast in the car; it has been cool lately. Having ordered from them for 20 years it would be nice to see the source of all the goodies

Went online, exchange with there online help who said "will call" wasnt an issue, just choose that box when choosing shipping method. I choose the components needed then got to shipping page. No "will call" box. Had to resort to calling the ordering line and a helpful lady said you need to put will call and a time in the special instructions box, even though it warns putting anything there could delay the order processing. You still have to choose a carrier for delivery , even though you wont be using one,  to get to the next page and complete the order!. She stayed online till the order was placed then intercepted it and changed it to will call; not an efficient process.

Drove to Mansfield, TX which took an hour. GPS said I was there and I suspected the big concrete building was Mouser but found no signange. Went to the reception (still no sign) who said willcall was round the back near the fedex trucks. The order was there, waiting and while there I got a paper catalogue. On the way out I found THE  sign, the only one on site,  at the intersection outside. All the entrances just say "No Trucks"

As WA5VJB was on my route home I  had lunch at the Mongolian BBQ with him, returning just in time to beat the Friday afternoon rush hour

Ubuntu on the Beaglebone Black

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After spending the afternoon over in Fort Worth doing a presentation on the 1.3Ghz UK Activity Contest to NTMS, this evening was spent installing Ubuntu on the BBB

Initially I tried the procedure using a prebuilt image  at http://www.armhf.com/index.php/boards/beaglebone-black/ and eventually, after solving some issues due to priveleges I got a USDHC card produced. Unfortunately, after powering up the BBB with the reset button near the uSDHC pressed as instructed and waiting, it produced lots of flashing blue lights but no video output. Time to try something else.

Next I searched for any other prebuilt images and came across http://elinux.org/BeagleBoardUbuntu#Raring_13.04_armhf (a later version of Ubuntu) I followed the instructions on my ubuntu laptop which did not need any corrections and built an uSDHC card

Booting the BBB with the reset button pressed it was reassuring to see a penguin appearing on the screen and a demand for login and password

Flushed with success, I decided to try and install WSPR. I used the process of the previous WSPR http://g4fre.blogspot.com/2013/01/wspr-on-rpilapdock-under-raspian.html blog. However all commands had to be typed in letter by letter, as, not having a desktop or browser I couldnt go to this blog and cut and paste!) It built way faster than it ever did on the RPI.

Launching WSPR it complained as usual about having no display to export to, so the next step is to install a desktop, find a sound card (and a browser!)

Ubuntu on the Beaglebone Black (2)

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Next I searched for a desktop. I spent 6 hours installing gnome-desktop. Upon reboot it showed promise, by showing a desktop screen but ignored the mouse and keyboard. So I rebooted and after the 3rd time I managed to get the mouse and keyboard working. I managed to add a new document to the desktop, but after much searching and experimentation I could not add any apps to the desktop, even they were on the machine.

Knowing that 13.04 was experimental, i decided to install 12.10 again http://elinux.org/BeagleBoardUbuntu#Quantal_12.10_armhf  This took a while, as usual.  I then installed ubuntu-desktop and this showed the same results as installing it under 13.04


So I made another card with 12.10 http://elinux.org/BeagleBoardUbuntu#Quantal_12.10_armhf and then searched for another desktop i found at http://elinux.org/BeagleBoardUbuntu the lxde desktop.  /bin/bash /boot/uboot/tools/ubuntu/minimal_lxde_desktop.sh took the whole of the Anaheim Detroit hockey NHL game to install. It did however end up with a desktop with mouse and keyboard. I installed wspr without incident, but the big issue was that the screen flickered any time the cpu had to do something AND the cpu usage hit 100% and stayed there. Obviously more work to do!
 

Working G100RSGB by 5760MHz EME

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At the Martlesham Round Table it was announced that GB100RSGB would be activated over the weekend of May 18/19 on 5760MHz EME to coincide with the DUBUS 6cm EME contest. It would be nice to work the call, but now my USA EME station is dismantled it would be impossible. I mentioned the activity to K5GW and asked if I could operate his station to work them, Sure was the response, and if you want to operate the contest, as I don't do it,  you can see what else you can work.

Arriving at the site at 1400 local on the Saturday, the equipment was quickly activated.  The station runs 125W to a 6.9m dish. The TWT is located at the feedpoint so feeder loss is not an issue. No immediate sign of  G100RSGB but CQ calls produced a pileup.  GB100RSGB was worked at  1018z .A little later I was called by G4CCH which was a suprise as I did not know he was QRV on the band. G3LTF was the third English station worked. Activity went quiet at 2300z (1800 local) so the opportunity was taken to work on the Doppler tracking software for my KX3 while waiting for the VK/JA window to open. At around 0500z  (0000 local) three JA stations were work before the moon set. I got back home at 0300 local, having worked a total of 22 stations, all of them on CW. The only getaway was LX1DB.
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W5HN 902/1296MHz Beacons

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Last Friday I went with WA5TKU and AA5C to the TWU dormitory roof to maintain the W5HN beacons on 902 and 1296MHz. THe frequency and power had not been set/measured in a couple of years so the visit was overdue.
The 902.370MHz beacon was still producing 10W and was within 200Hz of its nominal frequency, not bad for an unovened crystal. The 1296.370MHz beacon was down at 1296,349MHz and had low power output. 2mW in fact, 30dB down on nominal. I tuned up the oscillator chain and got 2watts back, but it went again. The decision was made to remove the beacons and take them home for maintenance on test gear. While there AA5C removed his old microwave beacon package

The 902/1296 beacon was taken to Bobs, WA5YWC, as he was the closest available spectrum analyser. Investigation revealed that one of the airwound coils had moved and broken the connecting PCB track. Resoldering it produced a stable 3W. Both beacons were left at Bobs on soak test over the weekend.

On Monday morning the power was still the same, just needed to set the receiver. The beacon was taken to W5LUA's shack as he has receivers on both bands. Just in case the 1296 beacon's crystal was bad I dropped by the storage unit and retrieved the spare crystal. Installing the crystal we got back to 1296.380MHz (the original frequency from 2000) and the FSK was still good. The 902 beacon was moved to the matching 902.380MHz frequency

On wednesday Wes and I  returned to the site and reinstalled the beacons, We also commisioned the Z3801 GPS locked reference which will be used as part of the upcoming 50MHz 6m beacon. We also investigated methods to integrate a 1W 10GHz amplifier into the 2/3/5/10GHz roof mounted beacon package





Holiday weekend Expedition Saturday

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For many years the locals in NTMS have activated a site near Mena, AR on the microwave bands. As it was a holiday weekend I thought I would drive up there and take a look

Leaving Plano at 0900 the route took me north through Texas to Eastern OK and to Mena, which is only just into AR. I was surprised at the number of Tortoises ambling across the road in OK (22!) I arrived in Mena at 1330, having stopped to admire Satis Dam. There is a ridge that runs E/W near the town so I headed up there  to the Queen Wilemena State park (where the NTMS expeditions camp)

First surprise was the full size steam engine at the park gates, the nearest railway is 12 miles away! There is also a miniature train that takes people round the park, but this was not operational. A short walk produced the following view. The path to Dallas is over the ridge on the right of the horizon


Next I went a walk down the lovers leap trail which was pretty and the downhill / uphill gave my daily exercise. The lodge at the park was being rebuilt so no refreshments, good job I had the emergency rice pudding

I then travelled back towards Mena and visited the fire tower. It was possible to climb up the metal structure to the top and admire the view


Exhausted after all this exercise, and having remembered I had the KX3 and a length of wire with me I decided to activate AR. I found another parking area with a good southerly takeoff and WW2R/5 proceeded to work 17 stations on CW , including 10 on 10m (it was CQWWWPX contest)  The long wire can be seen leaving the right of the car into the bushes!

  I also had WA5YWC flex1500 with 2m transverter so I hooked it up to my 902 Transverter and could hear the W5HN beacon on 902.380MHz with a cloverleaf antenna on the roof of the car. Seems to be working

I then drove 50 miles south and stayed in Texarkana, not many hotels around Mena.. Texarkana as its name suggests is a split state city, the hotel was in AR, the restuarants were 100 yards away in TX!


Holiday weekend Expedition Sunday

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Today started in Texarkana, AR. The aim was to drive South to Shreveport, LA. The drive was interesting with regions of oil wells and regions of nothing. Arriving in Shreveport downtown was even more chaotic than normal with streets closed and diversions for a memorial weekend Fair. Took a quick look at the red river then decided to go elsewhere.



I noticed that lake Caddo was NW of the city, straddling the TX/LA border and is the only natural lake with waters in Texas. It is also the location for the worlds first offshore (over water) oil rig in 1911!




As the CQWWWPX contest was still in motion the wire was thrown into a tree in the car park where the empty boat trailers are stored and the KX3 activated. 34 stations were worked with one European

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The night was spent in Marshall, TX


Holiday weekend Expedition Monday

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Starting in Marshall, TX I could have driven straight up I20 to Dallas. This seemed boring so I looked to see if there was a state park nearby, Searching the Internet I found Martin Creek lake state park. This lake was made to supply water to the Luminant 2.25GW power plant which can be seen on the West shore. The trains bringing Lignite from the local mine can be seen in the marshalling yard. Lots of boating and some nice woodland walks on the shore.



CQWWWPX had finished but i threw a wire into the trees and had a look around. 18MHz had the activity and P40A was worked and I had a rag chew with KS7D. I called GS4FOC many times. He got part of my call a few times but we never completed before he eventually faded out





Left the park at 1600, back in Plano by 1915, just in time for dinner



Statistics of the three day tour are interesting

860 miles drivencost $0.06 per milefor 
807 miles i saw no roadside starbucks (mckinney, TX to Terrell TX)!
22 tortoise, 1 racoon, 1 (live ) armadillo, 2 racoons and a skunk were seen

Remote Controlling with an Arduino Uno and a Nexus 7

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The local Radioshack was selling off some Arduino shields, as they were being discontinued as they were preferring the Seedstudio versions. I got an ethernet shield and an sd card shield, and was initially attracted to get the androidsdk shield until I realised that it needed a cable connection to my Nexus 7.  I wanted to do it by wireless so ultimately I could control things across the shack remotely

Searching the internet I came across a writeup http://www.instructables.com/id/How-control-arduino-board-using-an-android-phone-a/ which used an Arduino UNO and a bluetooth board to control the state of an LED. I already had a revision 3 UNO so I looked on ebay and found a cheap Bluetooth module. This arrived today

Following the writeup everything seemed to be working. I could see the rx led on the Uno flashing as it got data from the BT receiver but the LED stayed off. I was intrigued why the writeup said connect the LED to pin 2 of the UNO but defined the LED as pin 7 in the Arduino code listing. I moved the LED to pin 7 and everything worked great.

I tried voice commands but as usual the google voice recognition software could not cope!

I noted that a link to the source code for the android for the appinventor tool is available to "modify". That could be tomorrow nights Project



Creating an Android App with the MIT appinventor

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Next step to modifying the control app was to look at the MIT AppInventor. This tool is described at http://appinventor.mit.edu/explore/  To install the software on my winxp computer I followed the steps from http://appinventor.mit.edu/explore/node/165.html

Having got it installed I decided to try the "HelloPurr" demo app at http://appinventor.mit.edu/explore/hellopurr.html which makes a cat noise when the Nexus 7 screen is tapped.  All was well, following along with the directions until I tried sending the app to the tablet. Initially i tried using the apb method through the usb cable. The computer recognised the Tablet but I could never get the adbdevices command to show the device was other than offline.  I tried the wifi method but this was doomed if you have no control of the hotel router (i couldnt ping the android from the pc).

Looking around the tool, I noticed a "Package for the phone" "download to this computer" option which generated an .apk file, which by now I had learnt was the install file on an android. I also remembered that when i installed Google_Nexus_7_ToolKit v5.1.2 (needed to unlock the tablet so i could install non Google approved apps) It had an option to install an application from an .apk file through the USB cable. So I tried this method and the app installed.



For interesting reading material see the .pdfs at http://www.appinventor.org/projects

Next task is to see if I can modify the control app!


Van Cliburn International 14th Piano Competition

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Listening to the local classic fm station in Dallas (WRR owned by Dallas council on 101.1MHz) I realised that the Van Cliburn International Piano competition was under way at the Bass hall in Fort Worth. The group of 30 entrants had been reduced to 12. Each semi finalist has to play a 60 minute solo recital AND a 40 minute concert as part of a quintet. This results in 8 three recital sessions in 4 days.
Ever since coming to North Texas I have wanted to attend a concert live so, having some free time, now was the time. I was surprised to look at 1000 saturday morning, online, that tickets for the 1330 session and the 1930 session were still available, so tickets were booked.
Its only an hours drive to Fort Worth so a slight diversion to a Texan pre concert lunch was arranged to the Railhead BBQ in West Fort Worth. Central Fort Worth was traffic chaos as its the school graduation ceremonies were in full flow at the Fort Worth Convention Center, but there is a free car park across the road from the Bass performance Hall.
My seat was in the middle of a group of female Cliburn devotees who would be attending ALL sessions, so a lot of things that I had never worked out listening on the radio to the previous 4 competitions were explained
In the afternoon session Clare Huangci (USA) did a recital including Schumann Symphonic Etudes op 13, Beatrice Rana (italy)   in her Chamber piece did Schumann Piano Quintet in E-flat Major, op. 44 but the highlight was Nikita Mndoyants (Russia) who included a brilliant rendition of Mussorgsky Pictures at an Exhibition. All competitors have to include the commisioned work         "Birichino" by Theofanidis. I didnt realise till they interviewed Theofandis that the Cliburn competition take his score and remove all markings from it before the competitors see it so they have to interpret it, which makes 30 variations the composer gets to hear (no they cannot email him and ask him questions).
The concert lasted until 1645, so hunger started to set in, the 2nd session started at 1930 so I decided to go to PF Changs restaurant, just up the road from the concert hall and just have a Banana spring roll and Ice cream desert while watching Ice hockey on the TV.
The evening session started promptly at 1930. Nikita Abrosimov (Russia)  in his chamber recital did Dvorak                  Piano Quintet in A Major, op. 81 followed by  Tomoki Sakata (Japan, ONLY 19) solo recital which included Debussy  Études, Book I and finally Vadym Kholodenko (Ukraine) did Franck Piano Quintet in F Minor  in his chamber concert.
I enjoyed the afternoon session much more than the evening session, but I have never really enjoyed chamber pieces. After the concert finished the graduation ceremonies were still going on so we enjoyed a firework display


I got back to Plano at 2330, a long day!  The good news is that ALL concerts are being streamed over the internet at cliburn.org so I can hear the other 6 competitors and track progress

Elgin B Roberson State Park and 6m dx

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The forecasted storms did not materialise Sunday morning so it was time to visit another state park and get some fresh air. Looking at the map I decided on the Elgin B Roberson (South) State Park which is on Interstate 30 SE of Dallas in EM12. Examining the lake I found a length of fishing line which I  used to suspend my longwire from a tree. The rig had been left on 6m, so I was surprised to hear beacons when I turned on:- W0DMK (DM49), WR7NV (DM25), W7RV (DM35) N7JW (DM37) and K7VLS (DN24) were all heard at good strength. Listening in the SSB area I found K0YW (DM67)  a station I had previously worked off the moon who came back first call, I also worked on SSB AC7FL (DM33, ex brit) N7AMA (DM33). K6LL (DM26) KS7S (DM41) N3AIU(DM45)  W7ZR(DM24) were also worked on CW. Not bad for a 60' end fed wire. It did prove the KX3 ATU works on 6m. Grid is EM12RU

I also worked HC2AO on 17m CW before heading home


Hamcom 2013

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June brings the annual Hamcom hamfest to Dallas, which as always clashed with the ARRL June VHF contest.

As in the last three years I volunteered to help man the Elecraft Booth, but this year there was a change as Eric WA6HHQ and wife would not be attending, but I would get to work with Lisa, who I had spoken to a lot while placing orders over the phone, Dave  and Bob K6XX who I had spoken to but never met

The trade show exhibitors this year started earlier at 0800 and officially closed at 1800, making a long day. Lots of questions, the most popular being when can i get the KXPA100 100W PA for the KX3, which was on display. The other new Elecraft item for me was the K3/0 mini, which is a remote front panel for remoting the K3 in a just sufficient box; you wont need to carry a full size k3 box in future. Bob was remoting his HF station in California using one, which worked as well as the Plano conference centre's wired internet would allow (horrible latency/reliability). The isdr app for the ipad to produce a panadaptor display (demonstrated by Eric at last years Hamcom) for the KX3 also generated a lot of interest, but a lot wanted an Android app!

I did see a useful  aftermarket product for the KX3 which was an extended pair of sidepanels and a perspex cover to protect the front panel knobs on the KX3. http://gemsproducts.com/covers.html So useful i ordered a set Sunday morning

The outside flea market wasnt too exciting, but i did get a GPS board with CDMA modem assembly for $1. The Inside Fleamarket produced a couple of the HP 12V 47A PSU (like i used to power my 100W 3400MHz PA) for $20 each and a flexible solar panel. I also discovered that Buddipole now have a "knurled whip sleeve" to put over the telescopic whips with the 1/4-20 thread (like i use on my PAC-12 HF antenna) to stop the whip assembly wobbling in its ferrule, so I ordered a few

I did get to meet John Langridge. KB5NJD who also operates on LF as WG2XIQ, a station i hear often on 474.2kHz. Unfortunately I could not get to his talk, but I did persuade him to email me his Powerpoint which made for interesting reading



Radio Goodies Arrive

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The USPS had a busy day delivering today!

The new side panels for the KX3 arrived and took only 5 minutes to fit (including finding the correct screwdriver). The perspex cover is on backorder but the side panels are already protecting the knobs

The "knurled whip" sleeves arrived from Budipole and now the whip on my active antenna doesnt wave around. I might be persuaded to make another PAC-12 Antenna now as it will be more robust.

The DFS30 multiplier to be used as part of the new W5HN 6m arrived from G4HUP in England in an impressive 4 days (faster than I get mail from Austin 200 miles south!)

Finally an MFJ 6m folded dipole arrived so I can test out the 6m beacon and keep an eye on the band!






Printing money legally

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While staying in a hotel in Plano a few weeks ago, I was browsing the tourist leaflets in the lobby and was surprised to come across one for  the US Bureau of printing and engraving in Blue Mound, just North of Fort Worth. Until that point I thought all money was printed in Washington DC. The interesting point was that they did tours. http://www.moneyfactory.gov/tours/fortworthtxtours.html (whoever named the web site had a sense of humour!)

So Friday morning after the morning rush hour finished I drove over there. It took just over an hour, the biggest problem being the roadworks on I820 on the north side of Fort Worth

There is a separate entrance for the tour with security checks (no cameras, computers, phones, backpacks, Mace, explosives or any other electronic sevices). You then board a bus which takes you to the main building. There is a museum on the ground floor which was fascinating. For instance I discovered why the south got known as Dixieland. The Citizens Bank of Louisiana, a predecessor of J.P. Morgan Chase and Co., issued its own notes before the Civil War with the word "Dix", ten in French, on one side of the note. The region got know as the "land of Dix" which got shortened to Dixieland

On the first floor is a film theatre where there is a film showing you the printing process. There is also the entrance to the walkways so you can go on an audio book guided tour and see the printing machines in action. (until last October a guide did the tour but that stopped with Federal budget cuts!). Due to printing notes involving 3 printing presses and drying time being a couple of days it takes around 2 weeks from the paper input to the printed notes being given to the Feds. I also discovered there is a Damaged currency unit that redeems partially destroyed or badly damaged currency 





R820T RTL2832 SDR Dongle under Android

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Surfing the web I came across an article on the Ham Radio Science page http://www.hamradioscience.com/android-meets-the-rtl2832u/  with an app to use the SDR dongle I had previously used under windows and Ubuntu on my Nexus 7 Tablet under Android. The app is called SDR Touch, the authors web site is at http://sdr.martinmarinov.info/ . All I needed was  the appropriate OTG micro USB cable.

Firstly I downloaded and installed the demo version of the software and driver from the web site. I found my OTG cable that I bought after the Nexus 7 but never used. I plugged the dongle into the micro usb port via the cable and launched the App. It failed to find the receiver. I then noticed that the blue light had not illuminated on the receiver. Very Strange!

A trip was made to the local emporium (Frys) and a $5 OTG cable was purchased. Interestingly the sales lady asked what tablet was for. When I said the Nexus she said it would work, if I had a Galaxy it would not. Obviously all OTG cables are not created equal!

Now when i plugged the receiver in it lit up, the Tablet found it and I had a spectrum display. Tuning to the local classics station it demodulated nicely.





 The demo version has restricted features(no direct frequency entry, only 30s of spectrum display, no waterfall display and  no presets) but I was so impressed with what I had seen so far that I went to the app store and paid my $9.99 to upgrade from the Demo to the Full Version of the software. This was easily installed and the following shows spectrum, waterfall and presets:-




I did run the driver app on its own and it did show communication with the correct tuner chip


Very useful discovery.
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