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Hi Tony I think that most probably a QLG2 has better sensitivity because of the LNA in the QLG2 active antenna patch. However that also means it has a lower IP3, so in some circumstances it may have

Dan, Hans’s write up on the QLG1 indicates the large ground plane under the patch antenna contributes to its excellent sensitivity. I think you’re on the right track with trying a ground plane

I agree with Dirk’s assessment. Twenty years is a long time for a semiconductor to be on the market so TI is gently pushing customers toward newer devices. I found no reliable reports of the PCM1804

Thanks for the replies Mike, Chris and Bob. Well said Chris. Bob, in my testing it made no difference which way they were wound. I even tried "jumble" winding one of the windings so it had no

Do you have any photos or diagrams showing what the incorrect winding scheme you had looks like. I realise that a number of people are concerned that it isn't clear how the T507 transformers are

The square wave actually is better. The original crystal spec is (desired freq)-10.7 (IF) /3 (third overtone) Square wave means that there is usable energy at the

Hello Raimund Are you using the latest firmware? What is the problem here? I believe all RIT requests were fulfilled. 73 Hans

can also confirm this : entering the RIT menu for the first time after the update I was able to do steps of 10Hz. hope it will be fixed very(!) fast.

That would be the really hard way to go.? Little things like the TR switching is not adequate for 100W without modification. When amps are combined that is done at the core amp module level? then

Hi G.eorge I believe the U4B requires 5v from the usb cable to get the terminal program to start automatically. I would carefully check the pcb on the U4B to make sure you see 5v upstream of the

Hi, Wondering if anyone has tinkered with idea of combining 2 of the 50watt qcx amps using RF combiners Thx AA6ST

QMX +, new build, all bands except 6 meters, receive and transmit, but not 6 meters.? Transmit on 6 puts out about 25 MW, about a 1/4 of a watt, but draws same DC amps as on other bands, about 1.2

Hi George If you have the right cable we got QDXs, QMXs work with no problem. I don't see why it shouldn't work 73 DE muhsin TA1MHS ps. Spy stuff eh?

Primarily for fun it seems an AM mode would be simple to incorporate and a stepping stone to SSB.? I know this would be limited to 2W.

Greeting QRP-LABS fans! i Am trying something i have not see of or heard elsewhere... i Am trying to connect the U4B balloon tracker to an Andeoid device using an OTG connection and running the

Thanks for the input on your KLG2. Mike Krieger [email protected]> wrote:

A new chat has been created: During the COVID lock downs we had down under, I built two QCX which both fired up first go without any issues other than tweaking the toroids to see if I could get a

Eric, Beautiful build job. Especially the print on the face plate and the antenna ports on the top. i have purchased two built ZM2 AMUs and didn’t like the way they were constructed so rebuilt

I should have mentioned that i have also used an ATU-100 with that same EFRW + 9:1. It's nice to just push a button to tune, but I get lower VSWRs with the manual tuners.

Mike, Tony, I have had very similar experience with my QLG1 (x2) and QLG2 (x2). The QLG1's patch antenna definitely seems better. However, I have not tried it with the QLG2's antenna on a