[TenTec] When did Ten-tec switch to Schottky diode ring mixers?

[Duane - N9DG]

Looking at the orignal Corsair mamual I have it shows the
first mixer being made from 4 discrete MPN 3404's. As far as
I know the CII's all used the monolithic quad.

Duane
N9DG

--- Kevin Purcell <kevinpurcell at pobox.com> wrote:

> Excellent. Thanks Steve for that data point. And Don, NN8B,
> who  
> replied too. Both have the Corsair 2.
> 
> So they had switched by 1986.
> 
> Anyone with an original Corsair (Corsair 1, so to speak)? I
> think  
> that might be the rig they made the switch to schottky
> diodes.
> 
> It would just take a second to check the schematic in the
> manual on  
> the RF Mixer board :-)
> 
> They won't be MPN-3404 PIN diodes (which appear in fours in
> the  
> Corsair too) but something else.
> 
> I'm sorry I didn't mention the quad option too (so people
> go hunting  
> for 4 diodes) as it is similar to the digital Argosy RX
> mixer.
> 
> > TT will use either four discrete diodes (probably
> switching diodes  
> > if they were still using them but they may be discrete
> schottky  
> > didoes) or, more likley, a single quad schottky package,
> as they do  
> > in the 525D Argosy digital which is an ND487CI.
> >
> > Does the RF mixer board have a ND487CI on it?
> >
> > Or a similar 4 legged package between a pair of
> transformers and  
> > taking signal from the LO via a driver?
 



       
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