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Jerry, The problem is the input impedance is the aggregate of the Miller and fixed (gate capacitance). That means two things, it changes with voltage and power out (voltage swing at the drain) and

Sorry, I forgot you probably had yet to tune the IF section. It did not dawn on me that might be the issue. I have not scratch built SSB radios with IF sections but I did build one AM receiver which

Agree with Allison. If what you want is a FM monitor receiver, then design and build something specifically for that purpose. If you want an AM General Coverage receiver, then build one specifically

Alison ! Your reference to TDA7000 got me thinking how about a filter and ZN414 clone MK484 available from China. Appears nice simple a typical uBitx like solution. I still have some marine radios

Farhan, Look the traces for the final to the output transformer.? Make them wide (low impedance). same for the gate.? The interaction between the mosfets and the drivers is both closeness the three

Superregen at 45mhz as AM/FM detector... I can't go there.? ;)? I did it 40 years ago at 10.7mhz I learned a lot.? I wanted a RX that could hear Aircraft (118 to 136mhz) and 2M fm (144-148). Its a

Thanks so much for the quick and concise reply.? This means I'm almost done!? All I need to do is add a fuse. 73s from Dave in Missouri! KD0UYH

We can probably use the AGC for SSB as welll. - f lkorahul@...> wrote:

Alison, My main interest was in demodulation. With its full HF coverage lack of proper AM detector seems a major feature lacking in the rig. NBFM comes as bonus with this chip. TDA1220 has an

You should have a red wire that is not connected on the audio connector. There is a purple wire on the other connector will be a purple wire that is not connected. When wiring up the power connector,

I've found that when the new directory is created, if there are multiple files you need to move them there.

Hello to the group,I'm new here and just placed an order for the uBTIX kit two days ago. I forgot to pay the extra $10 for express shipping, so looks like another 3 to 4 weeks before I start having

Hello.? Nice to meet you all and thanks for all the contributions you all make here. I'm new to this so please forgive my ignorance.? I've almost completed my Ubitx but have a couple of noobie

Trust Rahul to discover these chips! The TDA1220 appears to be a winner. The simple alternative is a super regen at 45 mhz... - f

if the board does 10W SSB then am will be about 2.5W, not so much on that. The bands I see AM on or are 160, 75 and 40M and rarely on 10M but 2.5w will not cut it.? Generating? AM in a SSB system

Banggood's customer service isn't exactly top notch. I ordered something that came without a power cord and contacted their CS dept. The response was to send them pictures. Pictures of what? An empty

I have mine with an attached 5" display working good with FT8 and maybe fldigi. Short term memory shot at 78. I'll fire it up today and take some notes. I'm using the handy usb sound card with a short

If you don't have a scope, perhaps you have or can borrow a receiver that can tune those oscillators in. The oscillators are an unmodulated carrier, so best if the receiver is in SSB mode so you can

Tnx dave. This is a community effort as you know. I was helped with kicad by bhatnagar who is on this group. - f

Ashhar, I just wanted to comment on your Micro BITX kits in general.? In showing your circuit boards to some engineering friends of mine, they, and I, were impressed with the layout and workmanship