Woops, seems like the SSN (smoothed sunspot number) count for this month is equals to 0.
I only manage to make 6 contacts with DX station on 10 meter during September. Partly due to bad propagation, partly due to my busy schedule, which kinda limit my ham activities to Sundays and Saturdays.
I’ve been getting all sorts of questions about working 10 meter from fellow hams in my place. I advises them against it as the propagation right now isnt as great as couple months before
Plus, I’ve known quite few local hams that regret that they venture into 10 meter unprepared, as it requires a lot of patience and different skills to work with.
In another note, I would like to extend my warmest congratulations to those who has passed the 2008 Morse Code test, more details in 9M2MGL website
I took some time off to build my first HF antenna using the plan I’ve obtained few months ago. I chose moxon as my first 10 meter HF antenna as it is small and compact and it is directional, allowing me to focus it into a single direction for a pretty quiet QSO, without much interference.
The material I used in building this moxon are :
- Green ground (12 Gauge ?) wire, it has 7 copper wire inside it.
- PVC pipe (3/4″ diameter) as necessary to hold the wire in place, you can use other materials too, as long as it formed the basic dimension of moxon antenna
Antenna Plan and Results
I use the plan described in this post; 10 Meter Band Compact Directonal Antenna and started building it immediately. The result of the antenna can be seen here :
Although I build it only as a temporary antenna (thus its flimsy), it performed rather well when compared to other types of popular 10 meter band antenna in my place (Delta Loop, Inverted-V) as the antenna is directional and it does not requires the use of transformer balun.
I’ve managed to make contact with 12 stations in 6 days since it has been erected.
Some tips working on 10 meter band
- Use a good low loss cable such as RG-8 or Belden 9913
- Make sure you know where you point your antenna, the direction of your antenna is crucial if you ever to make contact with distant station.
- The propagation is pretty good during daytime between 3pm – 8pm by my observation, use that time window wisely.
Use directional antenna like Moxon or Yagi as they allow you to focus your transmission to a certain direction and eliminate excessive interference on the band.
- Be patient
That’s it and good luck!
I wouldn’t recommend PVC pipes if you are planning to erect a permanent antenna as they are flimsy. Use aluminium pipes or copper tubes as they are more durable and offers best performance.
Since 10 meter activities gained popularity lately in Malaysia, I decided to publish 10 meter calling frequency for the benefits of local hams in my region :
28.480 MHz USB
28.485 MHz USB
28.490 MHz USB
28.495 MHz USB
28.500 MHZ USB
Most local and DX activities concentrated on these frequencies with 28.490 MHz being the most popular for calling DX stations.
Tips for newbies hams on HF
Be sure to ask if the intended frequency is unoccupied by asking (“is this frequency in use ?”) at least three times. Then proceed to make a general call, “CQ CQ CQ this is 9W2QSO 9W2QSO 9W2QSO calling CQ CQ CQ, this is 9W2QSO calling any station and standing by” and listen for any call for few moments.
In Malaysia, the best time for 10 meter USB operation is around 4:20pm – 10pm, your milleage may vary though.
Here’s another 11 meter Moxon Antenna plan suitable for 27MHz CB, Freeband and lower 28MHz Amateur Radio operation band.
A- 392.09 cm (154 3/8 inch)
B- 58.62 cm (23 1/16 inch)
C- 11.25 cm (4 7/16 inch)
D- 73.4 cm (28 7/8 inch)
E- 143.27 cm (56 7/16)
Gain, Radiation Pattern (mounted at approx 30feet)
Gain : Approx 10-11dBi (30 feet above the ground)
Freq range : 27.300 MHz – 28.300 MHz
The main advantage of Moxon rectangle antenna are :
- Compact and Small
- Has considerable gain
- It can eliminate noise on HF band
- Easy to construct
- Suitable for HF operation (mid-low radiation angle)
Refer here for 10 meter Moxon Antenna Plan for Amateur Radio operation (28.2MHz-28.8MHz) : 10 Meter Band Compact directional antenna, Moxon
Due to the enourmous size of 3 element Yagi and the current working condition on 10/11 meter band, I decided to accept the advice of 9W2RZL and thinking of constructing a directional antenna right after I obtain the 11/10 meter rig (which is maybe around April).
Moxon antenna might suit my need as it is :
- has gain of around 5 dBi
- Compact and Light weight
- Easy to construct
- designed for 50 Ohm impedance
- Great F/B ratio, useful for blanking noise
Here is the plan for the 10 meter Moxon antenna, centered on 28.5 MHz frequency.
- A – 382.43 cm (150 1/2 inch)
- B – 57.13 cm (22 1/2 inch)
- C – 11.02 cm (4 3/8 inch)
- D – 71.06 cm (28 1/4 inch)
- E – 139.76 cm (55 inch)
These calculation are made for 12 gauge wire using L. B. Cebik Moxon Calculator tool. The Moxon on the above photo belong to Mark Rabel