[TenTec] Argosy 525 - three different RX mixers?

[Dr. Gerald N. Johnson]

On Thu, 2007-04-19 at 13:33 -0700, Kevin Purcell wrote:
<SNIP>
> Not a great data sheet (there are better out there but I can't find it  
> again).
> 
> <http://www.datasheet4u.com/html/N/D/4/ND487_CaliforniaEastern.pdf.html>
> 
> The specs are very similar to the HP diodes for both forward and  
> reverse voltages and switching time. And of course they're all  
> matched by design :-)

Actually HP used to claim that Schottky diodes from the same envelope or
batch were very closely matched which is a lot closer than silicon or
germanium junction diodes matched. Remember that the junction in a
Schottky diode is at the interface between metal and a uniform chunk of
doped silicon.
> 
<SNIP>
> 73
> N7WIM
> 
> On Apr 19, 2007, at 6:46 AM, jmalloy wrote:
> 
> > Also: are the diodes mentioned in the KW7CD article still available?
> > (They're spec'd as HP 5082-2800 and HP 5082-3081)  If not, does anyone
> > know of substitutes?
>