We use the Siemens BB535 varactor. An alternative we have specified is
the Sony 1T362 and the Rohm 1SV223 (though I think this is now also
obsolete).
I don't have the data book to hand for the Siemens BB535 / BB515 so I
don't know the differences but if not an exact alternative, Sony may
have something to suit. Hope this helps,

Richard Martin, Design Engineer
Tunstall Electronics, UK.

> -----Original Message-----
> From: Thibodeau, Chad [SMTP:[log in to unmask]]
> Sent: Thursday, January 14, 1999 9:40 PM
> To:   [log in to unmask]
> Subject:      [TN] Obsolete Varactor Diodes
>
> I am in desperate need of some suggestions.  I have three varactor
> diodes
> from Siemens that have gone obsolete:  BB515, BB619 and BB620.  The
> real
> problem is that these diodes are called out on a multitude of boards
> of
> which all have the same land-pattern (SOD-123).  If anyone has some
> suggestions as to alternate manufacturers I would much appreciate it.
> Also,
> I have already checked with M/A Com and Philips.  Hope to hear back
> from you
> all!
>
> Chad Thibodeau
> Component Engineer
> [log in to unmask]
> 2114 W. 7th Street
> Tempe, AZ 85281
> P-602 333-2138
> F-602 921-9012
> http://www.efdata.com
>
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