Re: Russian Woodpecker??
toggle quoted message Show quoted text
Re: Russian Woodpecker: Typo…. 1N5148 shud hv bn 1n4148.
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of KeithP
Sent: Saturday, February 26, 2022 8:44 AM
Subject: Re: [QRPLabs] Russian Woodpecker??
Russian Woodpecker find:
Given the weird voltages on IC 9 (QCX 20 M CW). I decided to take another look at the components. Ahahhh! There, I discovered that I had placed D3 (1N5819 Schottky) where D5 was (1N5148 Switching diode) and vice-versa. I’ll reverse them today and see what that does (with the hope I didn’t damage anything else. Prior to finding this, all the functions on the LCD were working fine.
From: QRPLabs@groups.io [mailto:QRPLabs@groups.io] On Behalf Of Ronald Taylor
Is this a QCX Mini Rev 1 or some earlier model like one of the QCX Classics or QCX+? 1.08 is a very recent firmware version that is backwards compatible with all the older models of QCX. Reason I'm asking is that the Rev 1 Mini had some issues at times with bad op amps that was corrected in later versions with different parts and factory testing of the board. QCX+ and QCX Classics didn't have many problems with op amps ... Thanks .. Ron
On Thu, Feb 24, 2022 at 12:54 PM KeithP <salmo@...> wrote: