----- Original Message -----
From: "Grant Hodgson" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, October 19, 2006 12:18 PM
Subject: [soft_radio] microwave LOs (was AD9850 DDS & AD8333)
> Dan
>
> I've proposed a microwave-based LO for the Pheonix receiver on the HPSDR
> project (hpsdr.org); dunno if they'll use it or not.
>
> The uW PLL ICs are usually a 24 pin leadless package, not BGA. But
> nearly all microwave devices have a connection on the underside of the
> package which must be soldered to ground. The only way to do this
> reliably is using re-flow and solder paste, and the PCBs have to be PTH
> so etching your own is not really an option.
For prototypes using those QFN devices I use a 1 mm via through the pad and
simply heat it up and feed solder in until it melts, after soldering the
side contacts.
73, Leon
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