My personal target for this project is simple: I want to activate HF keeping all the required radio & antenna equipment just below 1 Kilogram (1 kilo = 2,2 pounds = 35,3 ounces). Food, extra cloth, etc, appart.
If the challenge were on VHF it could be easily accomplished with a handheld, but to achieve that on HF is much more complex.
Last week I measured on a weighting scale the usual gear I carry on hills. It all weights about 2,5 kilo, just for the radio gear, and I add the water, extra cloth, food, etc. It’s not much, but I’m far from this challenge level…
In order to fulfil my target, first I must get rid of the FT-817 as the rig itself weights a little more than 1 kilo. A pity!
After checking alternatives with the gear I own at home, here is a list of the required minimum optimised gear I composed:
Rig: KD1JV MTR (20 & 40m CW), 168 g (yes, only CW, but I don’t have anything as light to do SSB+CW)
External SWR meter: NoGaWatt Kit, 123 g (to protect the tiny TRX against bad SWR…)
ANT: homebrew resonant EFHW for 10+20+40m, 165 g
CW Paddles: homebrew iambic , 42 g
BATT: LiPo 11,1V 2,2 Ah, 193 g
COAX: 3m of RG-174 & BNC, 67 g
Pole: 5m long, 375 g
spare cord: 28 g
SUM: 1,161 kilogram.
Oh no! I’m still above the kilo and I can’t fulfil my challenge!
After much thinking on feasible variation, I have chosen the following alternative:
to use a smaller batt: 2S, 7,4V LiPo 1000 mAh (55 gram), and
to replace the SWR kit with panel meters by a SWR led indicator (kit by OK1CDJ) 53 gr.
The sum is now 0,953 kilogram, just okay!!!
When this little battery is fully loaded it provides 8,4 volts, and therefore produces 3 watt output from the MTR; I think it’s enough for a succesful activation.
I will be using this setup in some of my next activation and promise to keep you updated with the results. This is an appropiate gear for very long walks or when it is important to keep the weight low.
Here an image of my compact gear. I plan to use a belt pouch in summer time instead the rucksack to carry the gear with me. Nice compact setup ;o)
Is there any other activator who can bring a similar setup interested on this challenge?
VY 73 de Ignacio.
Ps: I found another way to express the target:
Gear weight divided by Output power. My new setup is 953/3= 318 gram per watt.
The ideal situation would be: 1000 gr/5 watt= 250 gram per watt.
A litle difficult to achieve that. But so far I’m closer than with my normal FT-817 pack: 2500/5= 500 gram/watt…