[Boatanchors] Heathkit SB-620

[Mike Andrews W5EGO]

On Wed, Feb 18, 2009 at 04:42:36PM -0500, Chris Codella, W2PA wrote:
>    Good idea - and for some software, check out WU2X's site:
>    http://www.wu2x.com/sdr.html
>    These are generally much more useful, i.e. measurements can actually be made, than scope-based panadapters.  But the
>    scopes are useful for seeing a band at a glance.  Also the SDR based scopes are limited to the bandwidth of a sound
>    card - not necessarily a real limitation.

>    Robert Nickels wrote:
> 
> > Dave Brown wrote:
> > 
> > > The R7000 IF out is nominally 10.7 but  is at a very low level and
> > > wideband.
> > 
> > ... I'd consider using an SDR instead.   The cheapest
> > approach would be KB9YIG's "Softrock" which I know has been successfully
> > used at 10.7mhz.   See  http://www.softrockradio.org/SoftRock and the
> > Yahoo Softrock group for more information.  With a premium sound card
> > you'll be able to see +\- 96 khz with all the features of the (free) SDR
> > software such as waterfall display, multimode receive, etc.
> > 
> > 73 Bob W9RAN

The displayable bandwidth really depends on the radio, too. My SDR-IQ 
will display 190 KHz. I understand that the SDR-14, higher-priced and 
more capable big brother of the -IQ, will display 30 MHz bandwidth. 
Neither of them uses the soundcard, except for demodulator output: both 
send data to the PC over a USB-2.0 cable. I think the same is true of
the TAPR HPSDR project's hardware/software (the Atlas backplane, the 
various cards that plug into it, and the firmware running on those 
cards). 

Of course, all the above are as different from a traditional superhet,
regenny, or super-regenny, as can be. 

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin