[Elecraft] K3: band enable/disable option ?

[AD6XY]

You should really be using the transverter interface so that it is impossible
to have 10W emerging from that port, however, what I have done in the past
with radios without a transverter output, like the FT817, is to fit a 20 dB
attenuator in line. The system for 10GHz usually has more than enough gain
to overcome this by the time the low noise pre-amp is added. In fact, if you
arrange it properly and use a common TX/RX mixer you then do not need TX/RX
switching at the IF side and the dangers of blowing up the transverter by
not correctly switching TX/RX are over. 

Beware of the transverter interface, it appears to have some problems, at
least mine does, at low power levels.

Mike


Alexandr Kobranov wrote:
> 
> 
> Ok Arie, most such "ideas" are based on personal experience and feeling.
> For example when I am running K3 at i/f for 10GHz during contest using 
> ANT output for driving of transverter chain with 100mW out, I am 
> little bit afraid when somebody else from our club is running this 
> setup not to swith to some HF band by mistake where - if not set to 
> 0,1W for all bands before -  more power up to 12W (yes, I have 10W 
> only version...) can go to ANT and which is able to destroy 
> transverter TX input driven by 100mW.
> (Sometimes there is also unwanted band-switching during VOX or QSK 
> mode changing - yes it is mistake of operator, but...)
> So as you can simply see, in my case there is this reason to "disable" 
> all others bands from UP/DOWN swithing to in this specific setup.
> Maybe I am alone, maybe not :-)
> 
> 73!
> L. -dst-
> 
> Arie Kleingeld PA3A napsal(a):
>> During a WW contest there are many buttons I press and controls I touch.
>> I do not mind touching a band button an extra time to skip a band when
>> I'm changing bands.
>> This is realy the least of my problems...
>> 
>> 73,
>> Arie PA3A
>> 
>> 
>> 
>> -----Oorspronkelijk bericht-----
>> Van: elecraft-bounces at mailman.qth.net
>> [mailto:elecraft-bounces at mailman.qth.net] Namens Alexandr Kobranov
>> Verzonden: maandag 21 juli 2008 11:04
>> CC: elecraft at mailman.qth.net
>> Onderwerp: [Elecraft] K3: band enable/disable option ?
>> 
>> 
>> Maybe we can talk about BAND ENABLE config option which can disable 
>> some band(-s) from band UP/DOWN selection for example WARC bands in 
>> time on some WW Contest or all HF bands during transverter mode or 
>> some personal preferencies as 160 - 80 - 30m fast switching only etc.
>> Coming back to "enable" status for some band can be done via direct 
>> frq entry and then BAND ENABLE in config.
>> This enable/disable idea is only about band UP/DOWN button behavior 
>> nothing about mode or tuning/freq input/computer control ....
>> 
>> just idea
>> 
>> 73!
>> Lexa, ok1dst
>> K3/10 #727
>> 
>> 
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