[R-390] PIN Diodes and counter

[Bob Camp]

Hi

Remember when you look for PIN's that you don't just want one that's  
the right size, you also need the right speed. A lot of what's on the  
market these days has a fairly small minority carrier lifetime. They  
are fine for VHF, but not very good at HF.

Bob


On Jul 3, 2008, at 8:16 PM, Perry Sandeen wrote:

> GM List,
>
> I want to make a loop antenna and be able to change the amount of  
> turns electronically by using PIN diodes to short turns.  The  
> problem is that 1N5719 and the HP series cost around $5 each.  They  
> make PIN diodes for 40 some cents each BUT they are new SMA(?) size  
> that makes them about 1MM long.
>
> This far to small for my abilities.  Does anyone have a cheap(er)  
> source for PIN diodes with conventional leads or some leadless ones  
> that are larger?
>
> I'm also looking for a HP 5370B TIC
>
> Also for those on a budget there are very good values on Tek scopes  
> on Epay.  Many have DVM functions on the screen.  With the scope and  
> one of the newer inexpensive DVM’s a great deal of repair problems  
> can be solved.
>
> Regards,
>
> Perrier
>
>
>
>
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