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From: <hellozerohellozero@hotmail.com>
To: <rsgb_lf_group@blacksheep.org>
References: <57a24ca70912090730q682ffc79g7ffa9582e0cc40fa@mail.gmail.com> <20091210100700.32DEC31E703@smtps01.kuleuven.be> <1260444821.6353.65.camel@vaio3rd>
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Date: Thu, 10 Dec 2009 11:39:10 -0000
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Subject: Re: LF: AW: TX-2200A
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Look forward to seeing the Signals Rik - The 13th will be my last weekend of 
Ops in China, and will be returning to Oklahoma in January ,,,,,,,

Laurence KL 1 X in BY3A



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From: "Rick Wakatori" <7l1rll@dp.u-netsurf.ne.jp>
Sent: Thursday, December 10, 2009 11:33 AM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: AW: TX-2200A

> I agree Rik's observation on the 100W limitation.
>
> Average CW operator is a KEY-technician without any science.
> A good earth is essencial for LF operation, otherwise would get LF shock
> at frame of transmitter.
> Linear amplifier is based on self responsibility.
>
> There is another reason in a market place for such tranceiver in JP.
> 100W/50W machine has much wider, say 100 times, of market place than 1KW
> machine.
>
> In any way, there is still a high wall in front of a operator who
> bought the machine, such tuner, good earth, good antenna and etc.
>
> In any way, I will operate QRSS60 using TX2200A/50W at 137780Hz+-1Hz in
> a peak of peninsular from 01:00UTC to 02:30UTC on coming Sunday,December
> 13,20 or 27 depending on crimate.
> 73,
> -- 
> -.. .  --...  .-.. .---- .-. .-.. .-.. .-.-.
> 7L1RLL under ubuntu/Linux in Kawasaki,Japan(JP)
> URL=http://www1.u-netsurf.ne.jp/~7l1rll/radio.html
> -..--- -.- .-.. ..-.. --. --. ...- .-... ...-.
> On Thu, 2009-12-10 at 11:07 +0100, Rik Strobbe wrote:
>> Stefan,
>>
>> there is one good reason to limit the output
>> power 100W: more power could become lethal (high antenna voltages / 
>> currents).
>> The "black box operators" must be protected
>> against this danger, otherwise they might go QRT due to "natural 
>> selection" :-)
>>
>> 73, Rik  ON7YD - OR7T
>>
>> At 10:19 10/12/2009, you wrote:
>> >Warren, LF,
>> >Tnx for the info!
>> >I am not "afraid" that now many OMs come on the
>> >band who just bought their rig, like on HF. Even
>> >if you could buy a loading coil, you never will
>> >get qrv satisfactorily cause you always have to
>> >consider many things like the earth, the local
>> >noise reduction, the impedance transformation to 50 Ohm and so on.
>> >These OMs, even if they could buy a automatic
>> >tuner (that would not be easy to create as a
>> >commercial product) for LF, would be frustrated
>> >soon cause there are no contests and no 100s of
>> >stns calling on the band ;-) They would say "LF
>> >is dead, just nerving qrm" and would never get
>> >the fascination that we all experience.
>> >Finally I don't understand why this PA has just
>> >100W. To reach 1W ERP, most LFers have to apply
>> >1kW and more, so 100W is QRP on LF ;-). 1kW can
>> >easily be reached on LF without using expensive
>> >special transistors and drivers and ferrite
>> >cores. E.g. with one simple IRFP360 we can built
>> >a 1kW high efficiency calss d or e PA that costs not even 50€...
>> >These difficulties to get qrv is one part of the
>> >LF hobby and if they are solved, one can be glad
>> >even without doing 100s of qsos in one evening :-)
>> >
>> >Stefan / DK7FC
>> >-----Ursprüngliche Nachricht-----
>> >Von: owner-rsgb_lf_group@blacksheep.org
>> >[mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Warren 
>> >Ziegler
>> >Gesendet: Mittwoch, 9. Dezember 2009 16:30
>> >An: rsgb_lf_group@blacksheep.org
>> >Betreff: LF: TX-2200A
>> >
>> >Interesting new rig offered by Waters and Stanton - the TX-2200A 100
>> >Watt class D transmitter for 136kHz - VFO controlled with receiver
>> >muting.
>> >Made in Japan, relatively pricey though at 690 GBP!
>> >
>> >http://wsplc.com/pdf/TX-2200A.pdf
>> >
>> >
>> >
>> >73 Warren K2ORS
>> >                 WD2XGJ
>> >                 WD2XSH/23
>> >                 WE2XEB/2
>> >                 WE2XGR/1
>>
>>
>
>
>
>