Re: Make external connector on a USB dongle


"Jeff Liebermann" <jeffl@xxxxxxxxxxxxxxxxxxxxxx> ha scritto nel messaggio
news:2iblo11latvhuuee8fq1q8njfvbim0ffap@xxxxxxxxxx

> 1. You destroyed most of the ground plane. Not a great idea but
> probably acceptable under the circumstances.

Uhm, where is the ground plane?
The waste area of board was clean... It's not "coppered" (I don't know the
exact word, sorry).


> 2. The wire length between the center conductor and where the "cable"
> hits ground is way too long. Ground it to something near where the
> center conductor hits ground.

Yeah, I have thought the same thing...
Next try it's to rebuild ground connector to board.


> 3. Where's the shield wire on the coax on the connector?

It's around the dielectric, soldered on the connector: you don't see it
because the picture was taken at 90°.
I have more pictures, but not inside my computer: I'll show you soon.


> with a short coax or direct connection
> to L7.

Ok, next dongle... ;)


> Without a 50 ohm termination or antenna, the traces on the board start
> to look like radiators and act as an antenna.

Sure...


> Nope. You really need the filter.

Ok, I'm resolding it ;)


> Good luck soldering the tiny connector that will fit at SW1.

One moment... I don't wanna to put a connector at SW1 place... I wanna to
solder the teflon cable at SW1 pins with shortest central connector.


> I have a home made power meter made
> from an SMA conector, some chip resistors, a microwave diode, and a
> filter capacitor. Works nice.

My R&S was JUST arrived!

I'm intersted to your homemade...


> Ooooh... $15,000 and up. Can I borrow it? I'll give it back. I
> promise. Maybe.

Uhm... a LOT of coffee?
Nice tool, but I don't have the know how to use it...


> Otherwise... home made RF test equipment:
> http://www.qsl.net/n9zia/wireless/appendixF.html#10

I'll take a look...
Thanks again...


.

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