QRPLabs@groups.io

Re: 630 meter operation with the 10 Watt amplifier

The 10W amp was optimized for 160 though 10M and will work to 6M. Where the 28mhz thing came from is both false and misleading. Going down by more than an octave on the low end will require

By ajparent1/kb1gmx · #55441 ·

Stronger feet #qcx

My wonderful QCX+ is perched atop my K2, which gives it a perfect elevation and angle for operating. However, I'm having trouble with the supplied feet smearing around and moving, or falling off

By Lloyd K3ESE · #55440 ·

Re: 630 meter operation with the 10 Watt amplifier

I don't know if it will make a difference but I think the bias setting on the 10 Watt amp is designed for SSB use with the QSX whereas the 5 Watt amp is designed for CW/WSPR/QRSS etc use. The 5 Watt

By fred.g3srf@... · #55439 ·

Re: 630 meter operation with the 10 Watt amplifier

Well I will look at one and measure the Al and look at changing the core to a different mix. my bag. LPF is not a problem. Mel, K6KBE On

By Mel Farrer <farrerfolks@...> · #55438 ·

Re: 630 meter operation with the 10 Watt amplifier

I am remembering that amplifier was optimized to work well at 28 MHz, so a hit of a waste down there. So maybe explore the 5 watt amplifier it should he easier to modify. Wow its a lot of winding to

By Curt wb8yyy · #55437 ·

Re: Poor mans SMD rework tool

I have a small weller soldering pencil and if that fails two dual-heat weller guns and if those fail a Bernz propane torch with a soldering tip. The pencil is the daily driver and seems to be good

By Bill Cromwell · #55436 ·

Question about WSPR Meter propagation

All, I checked wspr.net this morning and received 45 spots in one period. (2 min) I'm in San Francisco and received 6 spots from Europe and three from New Zealand. Is 20 Meters starting to "open

By Phil N6WKZ · #55435 ·

Re: 630 meter operation with the 10 Watt amplifier

Thanks, probably the wrong mix of ferrite also. Mel, K6KBE On Tuesday, November 10, 2020, 06:59:27 AM PST, ajparent1/KB1GMX <kb1gmx@...>

By Mel Farrer <farrerfolks@...> · #55434 ·

Re: Poor mans SMD rework tool

My tool is a TCP-60 (weller, really old) which is a curie point temperature controlled iron. That with the 1/4" tip works well via the blob method. That being build a blob on the leads and then with

By ajparent1/kb1gmx · #55433 ·

Re: 630 meter operation with the 10 Watt amplifier

Asked before.... It will but poorly. Not enough ferrite or turns on the ferrite for that low. Allison ------------------------------- Please reply on list so we can share. No private email, it goes

By ajparent1/kb1gmx · #55432 ·

Poor mans SMD rework tool

Here's a trick anyone can do which is a low cost way to make a SMD removal tool. I did this years ago before affordable SMD rework tools were available. Get a soldering iron that accepts a 1/4"

By VE7VXO · #55431 ·

Re: looking for technics to replacing the IC4 FST3253

Dear Mike, I have used that method before but in this case there is very little room to move a feeler gage around. Thanks for the hint on some boards that really works well. Take care and have

By David R. Hassall WA5DJJ · #55430 ·

Re: looking for technics to replacing the IC4 FST3253

Dear Wilber, This is the method that I am planning to use. I ordered some micro cutters to aid in that process. I also ordered a Qwik chip kit to do the SI5351 chip. I will be delay the repair

By David R. Hassall WA5DJJ · #55429 ·

Re: The last Morse code maritime radio station in North America | Bartell's Backroads #video

Brilliant Bob thanks for sharing 73s Ted 2E0THH

By Ted 2E0THH · #55428 ·

The last Morse code maritime radio station in North America | Bartell's Backroads #video

https://youtu.be/GzN-D0yIkGQ -- 73 KD8CGH

By Bob Benedict, KD8CGH · #55427 ·

Re: BUILDING THE QCX+ AND 50 WATT AMPLIFIER IN THE SAME ENCLOSURE WITH QRP AND QRO SWITCHING #solution #enclosure #qcx+ and 50w amp in same enclosure# #auto switching qrp and qro #solution #enclosure #auto #50w #building

Following along and providing encouraging comments to see how this turns out. I like the idea of an all in one kit without the need for a separate power source!

By W5EGA@... · #55426 ·

Re: Common mode current (CMC) and QCX

Colin, A trick you might want to try is a 1/4 wave wire attached to the QCX ground. A 1/4 wave wire looks like a ground to the RF. Ed AB8DF

By Ed Kwik <ekwik@...> · #55425 ·

Re: QCX v.1 swap enclosure to mimic QCX+

My repackaging project is just about complete, shown below with it's younger brother. I abandoned the idea of using the tactile pushbutton switches due to space constraints. The Hammond enclosure I

By Al Holt · #55424 ·

Re: Progrock Si5351 Pin 14

Hans, could you either add the TCXO connections to the schematic or add my diagram to the synth manual? Also, a photo of the ProgRoc synth board with the TCXO instead of the crystal. I have bigger

By Bob M. · #55423 ·

Re: #qcx #alignment 8.5 Reference Frequency #qcx #alignment

Check that the 27mhz crystal is soldered well. A lead that is not soldered could be coupled to the circuit by a small parasitic capacitor that varies a large amount with changes in temperature, a

By Ron Carr · #55422 ·

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