开云体育

Hello!

?

?? Browsing the QRP-labs website, I was excited to find that Hans has released beta SSB software.? I immediately loaded it into my QMX+.?? After a few false starts, it was making power, using a Baofeng microphone from my UbitxV6.? I did have to make an adaptor becuause the tip/Ring wiring is opposite from my other radios.? The mic does behave well in the hardware microphone test.?

?

?I piped the output into my FTDX10 with a bunch of attenuation:? a 30dB 500W Bird, then two 20dB inline attenuators, then 18dB inside the '10.? It's recognizably SSB.? Once I got it attenuated enough so it wasn't overloading the radio, it looked nice & clean on the bandscope.

?

? Alas, with 3W output, I probably won't be making many SSB QSO's.?? What I need is to patch it into my homebrew 1kW linear.

It wouldn't drive the linear to full output, but it would make 300W or so, enough to play.

?

? To do that, I need the QMX+ to output a PTT signal and also a 4-bit Yaesu band code.

?

? I did buy the "dev" kit for the QMX+, it's in my junque somewhere.? But - what about the software?? Can't output that

4-bit code without software.? Hans did promise some sort of BASIC interpreter for the QMX, is there a timeline for that?

Can't hack the existing software because it's closed source & encrypted.? I suppose I could put another CPU in the box,

and patch into the band-choosing lines, but what a waste - there's a perfectly good CPU in there already.? Which surely

knows what band it's on.

?

??????????????????? - Jerry, KF6VB

?

?

?

?

And I just tried my Yaesu YD148 desk mike.? That worked also.? Bet it sounds better than the Baofeng.

?

You can get further on 3W than you might think, I was quite surprised.?

?

The PTT signal is already avaliable,? but needs configured.? There is no time line for the Basic code - I think you could likely get your favorite microcontroller set up on the dev card much faster.

?

Stan KC7XE?

Just had my first QSO.? A local ham.? Received a good audio report.? I was using the QMX+ and my "Tiny Linear".? The Tiny Linear is a 100W-capable homebrew unit.? It is in a box only slightly bigger than the QMX+.? It doesn't need band codes, you change bands manually with a touch screen.

?

? To make it work, I had to modify the QMX+ a bit.? There is a 220-ohm resistor in series with the output switch for the PTT.? That was too much resistance for the Tiny Linear, which actually runs its T/R relay through its PTT input.?? How much

current?? The output switch of the QMX+ is rated 170mA.??? OK, I forget how much the linear sources, so I measured it...17mA.? So I pulled the card out of the QMX+ and shorted across the 220ohm resistor.

?

Seeing 60W out on peaks.? Enough to be heard.

?

?????????????????????????????? - Jerry, KF6VB

?

?

?