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Excellent! This would give a highly efficient SSB transmitter, curious the technique has not been used more. On the positive side:? No need to steer the si5351 frequency around at audio rates if that

Hi, Rick My guess is that you are hearing power supply ripple. Put together 8 penlite - c cells - flashlight batteries and try the radio on that. One of the downsides of direct-conversion receivers is

Thanks for the great reply Alan. Am I correct in thinking that as long as these amps are biased (> ~0.6v) things are ok with the radio? As for the requested voltages: IC6 - All pins 2.64v (except 4

I remember an article written in 'The Bulletin' many years ago, when transistors were 'poor' devices.? The article showed that an SSB signal can be split into an amplitude component, and a frequency

I find when winding a core needing lots of turns such as for an 80 meter coil, to find the middle of the wire needed for the wind and then wind each half of the winding with each half of the wire.?

Hi Ron, No backlight on the display at all? Listen for the oscillator on a receiver to see if power is getting that far. Andy. -- The universe is made up of Protons, Neutrons, Electrons but contains

Thanks Glen. Good article. I had no problem winding T1 for my radio. It was yours that threw me for a loop for a while. I eventually undid it and rewound it all again. Oh, I haven't given up. I really

Hi All, Sounds like a case of the Google Giggle. We 'fix' your website so that no one can access it. We call this improving your business security. I noticed that the qrpguys.com website loads VERY

I think I'm slowly coming to terms with how EER works. Some might find the following discussion helpful. Consider a standard USB transmitter operating at 14.2mhz, with two constant audio tones of

IF you are having trouble winding T1 check this info out. Sent: Monday, December 10, 2018 12:59 PM To: [email protected] Subject: Re: [QRPLabs] T1 /g/QRPLabs/message/27864 -- 73, Jim

Could you have bumped the potentiometer for the contrast? It's pretty touchy and would give the same blank-looking display. You might also want to be sure that your processor chip is well seated.

Hi Rob Long shot See if the antenna lead connection is sound. 73s Ted M7ECH

Hi In As long as the windings don't overlap it won't make any noticeable difference (afaik) 73 Ted M7ECH

Hi Jim and all others who have helped me out. IT WORKS !!!!!! Put the new bits in this evening getting about 3w out from 12.5v. But the best bit is I got reports back from the reverse network beacons.

Have just completed the 40 meter QCX which is working well except for a microphonics issue? Whenever the rig is moved or touched, even slightly, there is a loud microphonic noise in the head phones

Greetings to all I had just finished building the Ulimate 3S and was proceeding to set up the various modes. All went well but after about 30 mins the screen went completely dark. There were no other

I opted to not re-use the wire, and simply used fresh wire, so my T1 is fully wound now, just not mounted yet as I get some household stuff done. Question....would using #24 vs the supplied #28 for

Agree with Ted. Indeed, take you time unwinding it and, when done, I take two pairs of pliers and give it a light stretch, which seems to make it easier to wind. Jack, W8TEE

Yep, it was in practice mode, so no output. Power out is still just 2.5 watts in SK mode, so the output filter isn’t quite right, minor issue. Also had the antenna plugged into the power meter port

That’s about what I found using a stepped attenuator to actually listen for minimum discernible signal. 72, Charles - NK8O