's Field Day effort. I hope to
work you!
Thanks in advance for the help.
Bob Lusby, k9foh
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Good point Jim - I hadn't thought it through to consider/realize that
the sound card is a full duplex device and therefore can handle TX and
RX devices both concurrently and independently.
Lee Pedlow NG6B
San Diego, CA
-Original Message-
From: Jim Lux [mailto:[EMAIL PROTECTED]
Sent: Wed
ks in advance for the help.
Bob Lusby, k9foh
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At 12:59 PM 6/21/2006, Pedlow, Lee wrote:
>I
>Modifying the SDR to separate TX & RX chains would require a wholesale
>rework of the entire rf path from TRX through to PA and duplication (at
>a minimum) of the BPF board in order to realize such a function. In the
>end, it would probably be easier t
Improving T/R relay transition latency through an alternative
implementation (e.g. solid state switch, different relays, T/R isolation
& receiver muting, etc.) is really the only way to practically change
the existing SDR for better QSK performance (for those that need it).
The board stack has TX &
Sure Cecil, here's my opinion.
First of all, it it NOT for hamming on 2 Meters.
It is not very sensitive, only covers 144 to 146 MHz,
and only has 100 mWatts of output. You would need
a receive pre-amp (GaAs FET) and a power amp.
See the FRS web site:
< http://www.flex-radio.com/accessories.htm
Lee and All,
Well, yes, but to QSK the SDR-1000 alone which is the first step
cheaper diodes can be used; 1N4007s work well at 100 watts. Check the
K2 schematic. This type of T/R switch can be modularized and
connected in place of a T/R relay, generically speaking, that is. A
small, fast re
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