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You can still use the “cheap” connectors. After soldering on the wires and closing the connector up drip some epoxy or other sticky glue down inside the shield. When it sets up the inside will be

I hadn’t wound a toroid for a couple of years and was hesitant to get back in the game but finally started on a QCX Classic for 30 meters. The toroids went easy and now on tune up I need to add more

I missed that he had already changed C25 and C26.? I see it now.? Well then, I got nothin'.

QDX:-) Hans does not seem to have covered Windows settings. In my W10 I can enter "microphone privacy" in the Search box to get a link to those settings. Right click your speaker icon and select

Tony Have you enabled the "microphone" of the QCX in Windows Microphone Privacy settings? 73 Alan G4ZFQ

... and not just change everything without reason.. -- Julian, N4JO.

I had indeed only replaced three of the four, because only L2 and L3 seemed significantly off. As I'm closer to a good number now, and I see that L1 needs two more turns, I'll replace the fourth (C28)

Just the four LPF caps. No others have ever caused a low output power problem. If you really did replace only three and it wasn't a typo... Of course then replace the fourth. Apart from that it is not

I haven't tried driving a GE without using the ICOM as it provides a degree of amplification/buffering - and I haven't determined if the raw output of the ProgRock+cable+filter would be enough to

So you simply forgot that you already suggested it. Boy, tough crowd this lot, eh? But while I have your attention, Sensei, are there any other caps I should consider? -- Julian, N4JO.

Hi Jim I did not forget... But in his original post in this thread, Julian said he had already replaced the LPF capacitors. Well he mentioned three of them and I assumed that was a simple erroneous

You are also getting the USB serial port as well, right? Can you use something like PUTTY to talk to the CAT control and monitor software? Look in the Windows device manager to see if a COM port shows

Thanks for that, Ronald. Yeah, I've replaced three of the four caps in the LPF, so I might as well throw in the fourth (C28). I wonder if that 0.1u in C29 is a candidate? It's right in the output

Thanks for that, Jim... Actually Hans DID remember it: my first email was to him directly, and he recommended my changing all four. I've done C25, 26, and 27, and I have the part for C28, so I'm going

Cool. Makes me wonder if I should not have done a 3:2 instead but eventually I want to use it with batteries and a switching buck converter for field use, so I am going to struggle with 9V. I have a

C25 and C26 are the bad ones.

I'm a bit surprised that Hans didn't remember this: a number of people had low output power on 20 meter QCXs.? This was traced to the 390 pf capacitors in the low pass filter.? Several people

Arthur, I assume the QCX and the TCXO are both matched up for 40 meters,and both work fine together, so if that is correct, I will buy them if they are still available. EuGene Smith, KA5NLY

Hi Julian. Well the early Classics on 20 meters also exhibited the issue of a slow power increase on key down. You’re seeing the opposite I know, but the earlier capacitors used were replaced with

Hi Ryan, Well, congratulations. I'm looking forward to receiving mine (mine hasn't shipped yet). You were -04dB in Boise. 73, Gregg W7GRM