Thursday 3 October 2013

City Windom Aerials @ The Ham Radio Shop, LAMCO Barsnley

LAMCO City Windom 40 

Electrical specifications
Model CITY-Windom (CW40100)
Operating frequency band, MHz
40 m, VSWR not more 1.5 7.0-7.2 MHz
20 m, VSWR not more 1.7 14.0-14.35 MHz
17 m, VSWR not more 1.7 18.06-18.31 MHz
15 m, VSWR not more 2.1 21.0-21.3 MHz
12 m, VSWR not more 1.5 24.9-25.14 MHz
10 m, VSWR not more 2 28-29,5 MHz
Impedance, Ohm 50
Connector PL-259
Max. power input, W 100 (PEP) (no more 3 min. SSB)
Length, m 21
Polarization horizontal
Weight, kg 1.2


A common problem of modern city radioamateurs living in high-rise buildings is the roof antenna installation. That is why wishing to have a multi-band "rope" which doesn`t require so many attachment points as, for instance, "Delta" is quite natural. But even a simple antenna like W3DZZ or Windom still require at least 2 attachment points at your and neighboring house. In that case the feeder entering the radioamateur window is difficult to install at the required angle close to 90 degrees if the radioamateur lives at the top floor. Than the only variant left is a Long Wire antenna. But it also has disadvantages as it needs a tuner and a good ground connection. The matching tuner must be always readjusted when switching from one band to another.
Considering these problems I decided to design Windom free of the above disadvantages. The new antenna`s feature is that the feeder and the radiating curtain form the integral unit. The locking throttle releases the radiator from the feeder at 30 dB, and the transformer 1:6 transforms 300 Ohm resonances at the bands of 80/40/20/17/12/10 meters to standard 50 Ohm.

"The fly in the ointment" was band of 21 MHz insistently unwilling to work together with the rest. Some maneuvers in that band startup bring to naught the 40 meters band.

VSWR diagram CW40100


The antenna well proved itself in operation. With the output of 100 W on 80 m band Europe reports at 59 in the evening; in the daytime within the radius of 200 km the communication is in VHF. Also, a decreased noise level of that antenna was noted in the reception mode, probably due to a short-circuited matching transformer. A good antenna operation in WARC bands must also be noted. The band of 17 m opening in spring already in February gladden with a number of exotic station from ZL and YB.
Field testing with suspension of a higher point on a tree of 15 m high also showed excellent results. QSO with ZD7 with the report 55 was especially memorable.
Advantages:
  • end-feed coaxial;
  • 6-band in 1 50 Ohm connector;
  • not need tuner;
  • ground not needed;
  • single line construction;
  • low cost;
  • low VSWR;
  • 100 W PEP;
  • low weight;
  • easy installation;
  • full size;
  • high gain on high bands.


£114.95
 LAMCO City Windom 80 


Electrical specifications



Model CITY-Windom (CW80100)
Operating frequency band, MHz
80 m, VSWR not more 1.6 3.5-3.8 MHz
40 m, VSWR not more 1.5 7.0-7.2 MHz
20 m, VSWR not more 1.7 14.0-14.35 MHz
17 m, VSWR not more 1.7 18.06-18.31 MHz
15 m, VSWR not more 2.1 -
12 m, VSWR not more 1.5 24.9-25.14 MHz
10 m, VSWR not more 2 28-29,5 MHz
Impedance, Ohm 50
Connector PL-259
Max. power input, W 100 (PEP) (no more 3 min. SSB)
Length, m 40
Polarization horizontal
Weight, kg 1.6


A common problem of modern city radioamateurs living in high-rise buildings is the roof antenna installation. That is why wishing to have a multi-band "rope" which doesn`t require so many attachment points as, for instance, "Delta" is quite natural. But even a simple antenna like W3DZZ or Windom still require at least 2 attachment points at your and neighboring house. In that case the feeder entering the radioamateur window is difficult to install at the required angle close to 90 degrees if the radioamateur lives at the top floor. Than the only variant left is a Long Wire antenna. But it also has disadvantages as it needs a tuner and a good ground connection. The matching tuner must be always readjusted when switching from one band to another.
Considering these problems I decided to design Windom free of the above disadvantages. The new antenna`s feature is that the feeder and the radiating curtain form the integral unit. The locking throttle releases the radiator from the feeder at 30 dB, and the transformer 1:6 transforms 300 Ohm resonances at the bands of 80/40/20/17/12/10 meters to standard 50 Ohm.

"The fly in the ointment" was band of 21 MHz insistently unwilling to work together with the rest. Some maneuvers in that band startup bring to naught the 40 meters band.

VSWR diagram CW80100


The antenna well proved itself in operation. With the output of 100 W on 80 m band Europe reports at 59 in the evening; in the daytime within the radius of 200 km the communication is in VHF. Also, a decreased noise level of that antenna was noted in the reception mode, probably due to a short-circuited matching transformer. A good antenna operation in WARC bands must also be noted. The band of 17 m opening in spring already in February gladden with a number of exotic station from ZL and YB.
Field testing with suspension of a higher point on a tree of 15 m high also showed excellent results. QSO with ZD7 with the report 55 was especially memorable.
Advantages:
  • end-feed coaxial;
  • 6-band in 1 50 Ohm connector;
  • not need tuner;
  • ground not needed;
  • single line construction;
  • low cost;
  • low VSWR;
  • 100 W PEP;
  • low weight;
  • easy installation;
  • full size;
  • high gain on high bands.


£124.95

The Barnsley LAMFEST Ham Radio Rally In Aid of the Yorkshire Air Ambulance for 2014 date has been set.


Tuesday 1 October 2013

Thursday 5 September 2013

Keeps your eyes peeled for what's hatching!

The aircraft is being loaded this weekend with an all new amazing product for it's official launch at the National Ham Fest.


Exclusive to LAMCO.

Keeps your eyes peeled for what's hatching!

Kenwood TS-590S fresh new delivery instock.

We have just received a fresh new delivery of Kenwood TS-590S TRX's.

Be quick....

Kenwood TS-590s + an MC-60a desk top mic'
Kenwood TS-590s + an MC-60a desk top mic'
Model : TS-590s
Manufacturer : Kenwood
Kenwood TS-590s HF/50MHz plus a Kenwood MC-60A des...
Price:£1,299.95
LAMI's Kenwood TS-590s+MC-60A+SP-23 Mega DX Bundle
LAMI's Kenwood TS-590s+MC-60A+SP-23 Mega DX Bundle
Model : TS-590s
Manufacturer : Kenwood
Kenwood TS-590s Kenwood MC-60A Kenwood SP-23 . ...
Price:£1,374.95

Wednesday 4 September 2013

Junksale Powered by The Ham Radio Shop LAMCO Barnsley.

Our in house web team are rebuilding the ever popular junksale.



We will announce in due course the launch date.

All new registration will be required for 
Buying and Selling.

Greenlight Labs GPS-710 now back instock @ The HAM Radio Shop LAMCO Barnsley

£139.95


Product Highlights
  • Simple plug-and-play design (less than 5 minutes to install)
  • Clutter-free attachment to TM-D710 Operation Panel
  • High performance GPS engine
  • Very low power: 0.2 Watts
  • Always-on design for instantaneous radio start up
  • RJ45 jacks employ integrated ferrites for improved noise immunity
  • Fully shielded, high quality jumper cables
  • Fully FCC Class B tested
  • RoHS compliant
Product Overview
The GPS-710 is a custom built, uncluttered, plug-and-play solution for adding a stand-alone GPS to your Kenwood TM-D710 or RC-D710 radios. It uses an excellent 20 channel SiRF-III GPS chipset (with WAAS, ENGOS, and MSAS augmentation) that can acquire GPS lock from a cold start in well under 60 seconds. The active internal antenna has proven to be extremely capable of maintaining GPS lock, even in very unfavorable mobile installations.  The GPS remains powered even while the radio is off, and provides data immediately when the radio is powered on - instantaneous position lock.  The GPS-710 draws about two-tenths of a Watt from the line, and does not present a significant standby drain to an automobile battery.
 
 
As you can see from the photo below, the GPS-710 is hidden well behind the Operation Panel. The GPS-710 is attached to the Operation Panel with automotive-grade "high bond" adhesive tape, designed to maintain a strong bond in temperatures up to 200F, which is well above the operating temperature limits of the radio. For anyone not wanting to mount the GPS-710 to the back of the Operation Panel, optional separation kits (6" and 24") are available.

 
The shielded serial jumper uses molded right-angle connectors with an integrated strain relief. The data jumper uses a double shielded cable that follows the Kenwood design for signal shielding. The wires are cemented into the RJ-45 (CAT6) connectors before being crimped into place and the resulting connection is extremely reliable.  Every GPS-710 is individually tested on a TM-D710 before packaging.

 
The GPS-710 is FCC Class B certified as a peripheral device to the TM-D710/RC-D710.  The RJ-45 jacks on the GPS-710 employ high quality EMI filters, so additional ferrites are not commonly needed.  An open "pass-through" 2.5mm serial jack is provided, as can be seen below, so that an external device can be attached to the TM-D710 and/or GPS-710 serial output signals.  An example of attaching the GPS-710 to a laptop (APRSISCE, APRSPoint, UI-View32) is given here.

 
The mounting bracket and COM port are both completely usable with the GPS-710 installed.


GPS Receiver Detailed Specifications
  • SiRF Star III high performance GPS chipset
  • Very high sensitivity
  • Extremely fast Time-To-First-Fix at low signal levels
  • Supports the NMEA 0183 data protocol
  • Built-inSuperCap to maintain system data for rapid satellite acquisition
  • Built-in active patch antenna
  • Foliage Lock for weak signal tracking
  • All-in-view 20-channel parallel processing
  • Snap Lock 100ms re-acquisition time
  • Superior urban canyon performance

Chipset SiRF Star III/LP Single
Frequency L1, 1575.42 MHz
Code 1.023 MHz chip rate
Protocol Electrical Level RS232 level
Baud Rate 4800 bps
Output Message NMEA 0183: GGA, GSA, GSV, RMC, VTG, GLL
Channels 20
Sensitivity -159dBm
Cold Start 42 seconds average
Warm Start 38 seconds average
Hot Start 1 second average
Reacquisition 0.1 second average
Accuracy Position 10 meters, 2D RMS
5 meters, 2D RMS, WAAS enabled
Velocity 0.1 ms
Time 1μs synchronized to GPS time
Maximum Altitude 18,000 meters (60,000 feet)
Maximum Velocity 515 meter/second (1000 knots)
Datum WGS-84

Wednesday 28 August 2013

Telford Hamfest 2013

Telford HamFest > Welcome

Welcome

Telford Hamfest 2013

Sunday 1st September 2013

Admission £3

** THANKS TO ALL VISITORS & HELPERS.
A VERY ENJOYABLE DAY IN 2012**

Visitors and Traders comments:

"...all the hard work that went into producing an excellent radio rally today. A good choice of traders and club stands made for a very enjoyable day..."

"...I was with the xxxx stand at the Telford Hamfest yesterday. I'd just like to say that we had a very enjoyable time there, and the various officials were particularly helpful and friendly..."


Telford & District A.R.S. are proud that the 7th Telford Hamfest is taking place as usual on the first Sunday of September 2013, co-ordinated with the famous Ironbridge Gorge Museum Trust’s Staff at Enginuity. We are also happy to add that the entrance charge remains at last year's rate and exhibitors' prices have remained static for the past six years. A list of Exhibitors in 2013 (and 2012) can be found on the left hand Navigation Menu.
The HamFest opening time is 10:30 as usual.

In 2011, we found space to introduce a small 'Flea Market' in the outdoor area. We hope more sellers will take advantage of this facility this year. Tables will be available at just £9 each on a first-come-first served basis. An advance phone call to Martyn on 01952 255416 would be very helpful in planning space.

Enginuity, right next door, is a fantastic ‘Hands on Technology’ Centre, which invites visitors of all ages and interests to roll up their sleeves and get involved, with a special admission discount of about 30% for all people attending the Hamfest.

The Committee and club at TDARS are working hard in preparation for September's event.The site offers more than just a traditional radio rally venue and we have developed a good reputation both for our exhibitors, but also the location and local attractions. The 2012 event saw us maintain the same visitor levels as previous years, testament to the quality of traders and venue. Last year we booked another eminent speaker in the adjoining "gallery", Stuart Wisher G8CYW, for a presentation and demonstration of Light Communications. This year an invitation has been extended and accepted by the very well known Rob Mannion G3XFD, who is retiring this year, and has chosen
"My Adventures as Editor of Practical Wireless"
for the title of his presentation. As usual, attendance is included in the admission price.

The venue is just a few minutes (4 miles) journey south from the M54 (J6) at Telford and from other trunk roads.(Main parking Postcode TF8 7DU). See location tab for detailed directions.
FREE PARK AND RIDE FOR 2013. This regular 12 minute service operates near the roundabout at the top of Jigger's Bank (A4169 - postcode TF4 3QE), which is the normal route to Enginuity. It takes you almost to the door. Return pick-up is on the main road opposite the site, by the Enginuity venue. The free parking at the Aga works is still fully available to visitors.

From feedback and given our experience in 2012, we anticipate most available space will again be booked prior to the event. Our previous experience in organising radio rallies will ensure all arrangements will go smoothly and efficiently, and a good day will be had by all.

Tuesday 13 August 2013

Yaesu FT-252E VHF handset @ £89.95 from The Ham Radio Shop LAMCO Barnsley.

Yaesu FT-252E 2m '144/145MHz' all new handset arriving on Wednesday 14/8/2013.

£89.95


Two Years Yaesu UK Warranty.
Bye Bye Cheap Style Handsets!!!! Yaesu have launched there very own price sensitive handy.

Trans Atlantic Balloon Communications Flight Sponsored by LAMCO UK & Icom UK.

 David ‘M0XIT’ is busy preparing an Vine Antennas RST-Rig Case with an Icom IC-7100 + AH-4 fir a Trans Atlantic Balloon expedition later thi...