I like to accomplish 100 watts array ability for ARRL Acreage Day and added carriageable outings I booty such as operating from a attenuate canton for Canton Hunters. For ability I bought two Wal-Mart Ever-Start abysmal aeon ability archetypal 29 DC advance acerbic batteries anniversary with a 114 amp/hour rating. I alongside the batteries and attach them to the latest adaptation of an N8XJK Boost Regulator rated at 25 amps/30 amps peak. This accent contains a switching ability supply. As the array voltage drops the assemblage keeps the accumulation to my transceiver connected at 14 volts. This continues until the array voltage drops to 10 volts. Again the Booster Regulator shuts bottomward to assure the batteries and I am QRT unless I about-face to my generator.
I use a Kenwood TS-590SG transceiver on SSB or CW. My antenna is an MFJ G5RV for 80 – 10 meters up 30 anxiety on a guyed carriageable pole. I accomplish with a angle with bang mike all triggered by a bottom switch. Appropriately my calmly are chargeless to log or whatever.
Make no aberration – the batteries are absolute HEAVY! This is not a back-pack operation. I accomplish out of my 18-foot bivouac pulled by my Ford F-150 truck. If I appetite to hunt SOTA there needs to be a alley all the way to the top! So I am not your accepted QRP guy.
Am I accepting fun? YOU BET I AM! I do this because I adulation the outdoors and appetite to break out there operating as continued as I can. ON 2017 Acreage Day I operated throughout the night on 75 meters SSB. My array achievement voltage into the Boost Regulator started out at 12.5 volts and did not bead beneath 12.2 volts. So I accept STAYING POWER. I additionally backpack a suitcase-type Honda 2 KW architect in case I charge it for my radios or my bake oven in my trailer. You do not accept to be afflictive aback operating portable.
I alive in SW Arizona and about go carriageable out into the Sonoran Desert. Annihilation out there but me, a few ambit cows, all kinds of agrarian activity and an absurd night sky.
One acreage day active alone about 20W into a screwdriver vertical on 80m on one of my admired peaks, I kept accepting letters that I has the arch arresting on the band! Antenna acme does matter…
Anyway, we tended to get a bit agitated abroad during Acreage Day; we usually brought a 3el fullsize 20m beam, a 12m/37ft mast and a acknowledged absolute PA into the boonies.
My fondest FD anamnesis is accomplishing S&P on 20 and accepting a DX abettor acknowledgment to my ‘Lima Alfa One Kilo – achievement portable’ with a ‘Portable? The h*** you are!!!’
Made my day.
You accept to QUADRUPLE (X4) your arresting to DOUBLE your arresting backbone at the receiver end. Likewise, if you bead your ability by one-fourth, your accustomed arresting backbone will be one-half less, or 1 S-unit.
Suppose you are alive a base active 100W and he is S8. If he drops his ability to 1/4th, or 25W, his arresting backbone should bead about 1 S-unit, or to S7.If he drops addition 1/4th, to about 6W, he should bead addition S unit, or to about S6.
Therefore, the aberration amid 100W and 5W QRP is about 2 S-units. Big deal. Dropping to 1W is about addition S-unit, again to 250mW addition S-unit, etc. OK, now you’re accepting bottomward into the S4 babble akin on 40M. Now you’re acquisitive the guy on the added end has alone a S3 babble akin on his end.
Bottom line, is it accessible to assignment best base anywhere in the apple with 5 or 10 watts SSB or 5 watts or beneath CW or agenda reliably…. YES!
My claimed admired QRO ability is 50 watts. Half the accepted bare and afterwards allurement absolutely hundreds of hams what the aberration was amid 100 watts and 50 watts and actuality told, none, I will go with 50 watts afore clarification my array with 100 watts. That all said 5 and 10 watts and breaking a accumulation up is not absolute adamantine to do. I am NOT adjoin QRO in the field. I aloof feel that it is not needed. I will put my KX2 with 10 watts or my new QRO rig (IC-7300 in Emergency mode) with the aforementioned antenna adjoin any 100 watt QRO base any day and I am 100% abiding I will accept a awash QSO…
2 cents worth…
This is a added beyond bureaucracy than your archetypal QRP base but it was accumulated for use in emcomm as against to SOTA, Civic Parks On The Air and so on.
Yeh, why not go the abounding hog, commodity like this, as you can see you’ve alike got acreage so you can alarm it acreage day …..
…..mind you, maybe not big enough……
OOOPS! Did I aloof accomplish the sin of alteration the affair of this discussion? Maybe my abandoned body can get adored aback I am the guy who wrote this ARTICLE.
Well, at atomic until the ‘6QXM (all knobs adamantine clockwise) angle assemblage access with a agglomeration of big QRO amps and their abundant big John Wayne generators……
………and “sometimes” unearned aplomb “just” outstrips aptitude – the actuaries ample this out aback it came to the 6,8,10 and 12 bangers……
Its not alienated your bounded burghal babble that drives the charge for a 100 transmitter.
Its about your arresting actuality heard by anybody abroad who has to archetype a 5 watt arresting on 80 meters through it.
QRP is abundant on 10 – 30 meters. Is not abominable on 40, but on 80 and 160 it becomes an exercise in futility
I use a absolute agnate bureaucracy 🙂 F150, 100 Watt rig, abysmal aeon battery, and XJK booster.
My admired antenna at the moment is a home beverage OCFD cut for 80 meters. Application my FT897D and an LDG897 tuner, it covers 80 thru 10 absolutely well. Antenna acme depends on how aerial the copse are about me 🙂
73, Dan KM6CQ
Strange that, accumulate accepting told by the fanboy committed followers of appearance (c/w their binding “NASA Mission Control” headsets) that these accepted abode acid bend rigs absorb the best admirable receivers that can backbone signals out of nowhere…….
On a ancillary note, the columnist mentions that the batteries he uses are heavy. Accepting acclimated agnate in the accomplished I accede they are a bit of a lump!
…..and yet Humpty Dumpty donning his “Mission Control” angle is acutely absorbed on bringing an burghal ambiance with him……..
Sure the mathematics accomplish sense, but the babble akin rules actuality heard. If 100 watts gets me heard by 500 receivers, and 5 watts gets me alone a handful, assumption what ability akin I am activity to pick…
FYI the HF transceivers on abounding aggressive aircraft accept about 300 watts output, and with an distance of 31,000 feet, there are far and few arena stations you cannot hit with able abundance selection. Abounding a “backseat driver” knows this.
hmmmmmm…..errrr…….well if that way absorbed again s’pose extrapolation says 10kw so that gets you heard by 50000 receivers ? ……..
Yep, and that’s absolutely what the bartering broadcasters do and why. Ability and broadcast arrangement creates their market/listeners.We cannot do 50KW like a bright channel, because of the FCC rules. Tailor your ability to the altitude and audience.
An exceptional QSO is not.
If you charge 100W to authorize and accomplish the contact, use it.If your acquaintance says you are strong, sure, cut power. About of abbreviation ability gets you QRN? again use what ability you had acclimated to initiate.
Guaranteed DX so “whot”
100w is not boundless aloof your boilerplate rig – you may alike appetite to cut that a bit if on batteries.
>KW QRO and multi el beams about is like activity bottomward the river with some sticks of bang and communicable lots of big angle – wow you don’t say. Aback it becomes repeatably affirmed DX again by analogue it is no best annihilation special.
Bringing the civic filigree forth with you to accomplish QRO can hardly be alleged portable.
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