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Re: PBC rev 4 #qcx

 

Greetings all;
? ? OK so I understand the differences between Rev 3 & 4.? Since my 20m version is Rev 2 & 40m version is Rev 3, can I make those changes reflected in Rev 4 to my Rev 2 & 3???

73;
Kurt - W2MW

-------- Original Message --------
Subject: Re: [QRPLabs] PBC rev 4 #qcx
From: "Chris Smith" <me@...>
Date: Tue, July 10, 2018 8:28 am
To: [email protected]

Excellent. Thanks for confirmation. Got an excuse to fire up the soldering iron tonight :)

Chris
M0XTE


On Tue, 10 Jul 2018, at 13:14, Hans Summers wrote:
Hi Chris
?
For the sake of clarity, I assume that the only change is the part footprint on the PCB and we should be retrofitting 100nF caps on rev 3 boards as well in the existing footprints?

In Rev 4 C21 and C22 are replaced by a smaller part footprint, for the 0.1uF (instead of 10uF). They were moved a bit to make space also for the optional C54. But there is no change to the electrical circuit as such. On Rev 3, it is equivalent to replacing 10uF capacitors C21 and C22 with 0.1uF.?

73 Hans G0UPL
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