[Elecraft] Questions regarding my new KX3.

[Wayne Burdick]

"Jack.f6ajw" <jack.f6ajw at gmail.com> wrote:

> I have some questions regarding my new KX3 (I love it!).
> 
> 1) how could I use my KX3 on 472 kHz (new band freshly opened in France) in transmit mode even at low power like on a TS-590?

The KX3 doesn't have sufficient filtering for transmit at 472 kHz, nor much gain at this frequency in the PA. I would suggest using an external transverter for this band. For receive-only use, you could add a 500-kHz low-pass filter to eliminate any images due to local oscillator harmonics. 


> 2) regarding the 2 meter option for KX3 (which will be available in September, as far as I know), I would like to use it with DB6NT Microwave transverters which could be controlled in TX mode thanks to a + TX voltage of 5 to 12 V on the inner conductor of SMA antenna with a very low current (to the base of a low-power switchîng transistor). My FT-817 was modified this way on BNC output injecting +5V TX through a 4.7kR and a 1nF in order to prevent DC to enter receiver.

Yes, the KX3-2M (and -4M) module will include a switchable DC voltage at the antenna. 


> 3) same question regarding BNC output as 28 or 50 MHz could be also used as IF for 70 / 23 cm transverters .

Sorry, there's no provision for DC at the BNC output of the KX3.

73,
Wayne
N6KR