开云体育

Well there is no real absolute way its done as you probably know, you first need to determine the noise floor (for the mode) and that is usually the point at which the (S+N)/N = 3db (and of course,

That was changed...don't know why it wasn't updated. Jack, W8TEE

Hi Bill, 100 dB relative to what?? How did you measure that? -- 73 Greg KF5N

“The latest (V12) PCBs are available for less than $5 each on the web site (/g/SoftwareControlledHamRadio). If you wish, pre-fabricated PCBs with all SMD devices already on the

I think this is the correct link: https://a.co/d/7OvoqhH

Ah… old fashion Automatic Volume Control (AVC) dated from the old tube radios…to control the volume of the radio as to not blow out your ear drums… as opposed to RF Gain (or Automatic Gain

if you are in the UK i have a spare set

Yeah another mistake is pulling the wire so tight that is scrapes the enamel off the wire between turns and shorts them together. I am guilty of doing that… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK

Yeah it does... Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton –

I can see me messing up those I will rewind for grins. Tim

*** Does it tune smooth? No ticks? - Jerry, KF6VB

Doesn't the newer RF board have the solder holes in the middle of the attenuator pads? - Jerry, KF6VB

All: Just heard from Amazon and the updated version is now being advertised: Jack, W8TEE

-78dB? My V11 : with HC125 buffer, no shield on display, and 12V switching power supply

That’s not bad… there is some low-level noise on the signal at about 400 hz and I wonder what that is? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner -

John… This is good work. I just ordered the parts for the Display Driver kits after I got good reports from 4 of the 5 kits I sent out for people to try. The parts for the remainder of the Drivers

What is coming out of the QSE after the BPF? The PA will amplify pretty much everything from 1-150 MHz (at different gains). If the input is not clean, the output won’t be that clean. Dr. William J.

The noise floor for the current V12 radio is better than -100 db as measured without the driver chip… My V11 with the buffer chip is nominally -78 db. That is ok for a test platform (toy level) but

Have you got a block diagram of this/ signal flows. Its something to contemplate vs. a FPGA and a Teensy. I’m formulating my next steps and want to get the next step absolutely perfect. Dr. William

May be a bad cable or on the wrong cable (remember… there is WINE, WIRE1, and WIRE2…. Three channels for the I2C comms so you gotta be on the right cable. See the development document on the