Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread AD6XY
I can not see any reference to noise figure in the brochure. Just MDS and FM sensitivity with no bandwidth. When I get mine I will measure the noise figure on a test set. It is likely to be under 2dB and I will use a low ENR head! I suspect like the XV144, the K144XV will need some gain

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread Giulio Pico - IW3HVB
IMHO an external sequencer is still the best way to have a foolproof system. Running QRO with a mast mounted lna isn't a good idea if you don't have one. 20 ms is not enough for sure, as most of the QRO coax relays have a switching time of that amount or even more My sequence timing is

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread David Pratt
In a recent message, AD6XY m.j.wil...@rl.ac.uk wrote ... I can not see any reference to noise figure in the brochure. Just MDS and FM sensitivity with no bandwidth. The manual gives this as 1dB nominal. See http://www.elecraft.com/manual/K144XV%20Manual%20A3.pdf 73 -- David G4DMP/G3KEP Leeds,

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread John Lemay
To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft[K-3] K144XV IMHO an external sequencer is still the best way to have a foolproof system. Running QRO with a mast mounted lna isn't a good idea if you don't have one. 20 ms is not enough for sure, as most of the QRO coax relays have

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread Geoffrey Mackenzie-Kennedy
David, Wayne said: It's actually more like -144 dBm (500-Hz bandwidth). I assume that this refers to a K144XV installed in a K3. This equates to a noise figure of 3db. To achieve a lower noise figure, the gain used in the K144XV would have to be greater, which would further reduce the

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread Don Wilhelm
: [Elecraft] [K3] Elecraft[K-3] K144XV IMHO an external sequencer is still the best way to have a foolproof system. Running QRO with a mast mounted lna isn't a good idea if you don't have one. 20 ms is not enough for sure, as most of the QRO coax relays have a switching time of that amount or even

Re: [Elecraft] [K3] Elecraft[K-3] K144XV

2010-01-08 Thread AD6XY
I know this - so does everyone. I have actually read the manual. However, there is only one TX inhibit and it is shared with the K3 on signal, which I happen to be using. Even if I was not using it the inhibit might easily be set to the default K3 ON and be ignored. Perhaps one of the DIGOUT