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Hi Hans, Thanks for your reply and I hope you enjoy your family vacation. I'm very grateful for the "Assembled Kit" option at a reasonable cost. 73, *Howard* *W6ZZ*

T1 is most likely he cause, it MUST be wound correctly as per the instructions AND the ends of the copper wires need to be cleaned of insulation DO NIOT RELY on a hot soldering iron to do the job,

I dunno, $20 for the 'proper' tool versus 'found it around the house' or a dollar store item, probably depends on your circumstances, but I applaud Bruce's ingenuity! 73, Willie N1JBJ

This is not a DIY stripping tool: https://www.knipex.com/products/precision-tweezers/stripping-tweezers-for-coated-wire/stripping-tweezers-coated-wire/1511120 but works very well for stripping small

P.S. there has been considerable movement of the list... QRP Labs team are still there in the office producing and shipping assembled radios as well as the normal kit orders. 73 Hans G0UPL

Hello Howard I'm in the middle of two weeks' family vacation right now and I can't update this until I get back to the lab on 06-Feb-2022. 73 Hans G0UPL http://qrp-labs.com

Very nice, Ed I had ine if those same Motorola Communications analyzers for several years. 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Thanks, that was the clue I needed. Just need Hans to update the build Operating Manual. 73, Warren. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Dear all, On most class C and D amplifiers the IRF510 is followed by a trifilar or bifilar transformer toroid.? ?Can someone please explain what the function of the this type of transformer is.?

--------------------------- Assembled kits order status --------------------------- *PAGE LAST UPDATED: 20-Jan-2023* Thanks/73, *Howard* *W6ZZ* *http://www.qrz.com/db/W6ZZ ( http://www.qrz.com/db/W6ZZ

I was thinking about the physics and hassle of removing enamel from the wire we use for toroids, and suddenly this came to me. It works GREAT for me on the larger diameter wires, +/- 24/26 guage. It

Old school frequency spectrum analysis for 40m but very cool if you see this pic Hans: Ed Tink

Hello everyone! I'm THRILLED to report that my QDX is back up and running after being QRT for 16 days! ?Replacing the 4 BS170 MOSFETs and the IC5 driver fixed it! What have I learned or done this

Dave, this is a QCX Mini that Tim built. All the resistors are already installed SMD units and the main board is tested at the factory before shipping so it's much less likely to be the issue. What

The biggest issue you are facing is that with a kit almost anything could be wrong. Excessive gain suggests the wrong resistors were put in the feedback loop on an OPAmp, so grab a magnifying glass,

Hi Tim. If the volume pot is basically full volume at any setting it usually means the ground end of the volume control pot isn’t grounded. Check solder joint on the pot and on the 2X4 pin header on

I seem to have killed my QCX+ receiver. It still receives but very very low sensitivity. I may have overloaded the front end here in the shack by keying another radio nearby or it got damaged

Hi folks, I'm a relatively new amateur and this is my first build: a 40m QCX-mini. When we tried to do the adjustment and alignment, the gain only had to be turned up to maybe 1 on a scale of 1-10 to

Try changing the double click duration. Mine was to short to work.

Still looking for some help with this one, According to the OpMan v1.08/1.09 the backlight can be temporary controlled by Double Clicking the rotary encoder shaft button (page 33 section 7.11) On the