Signal at DB3 pins 3 & 4 is ~200mv pp. (187-ish?) I also followed that through to U9 pins 3 & 5 and it appears more like ~800mv pp. I do not appear to have any meaningful signal at DB2

output on DB3 pin 4 to ground and DB3 pin 3 to ground during CW > transmit. What is the peak to peak voltage, and is it a clean sinusoid at > the 80M frequency? DB3 is in the lower middle

output on DB3 pin 4 to ground and DB3 pin 3 to ground during CW transmit. What is the peak to peak voltage, and is it a clean sinusoid at the 80M frequency? DB3 is in the lower middle section

reading on DB3 pin 3/4 during TX (CW mode, 80m):* > → ~*240 mV pp*, sinusoidal > → Seems low, not a clean "strong" 80m sine wave > > -------------------------

down to DB3 pins 3&4 no signal when keying the transmitter? >>> We are just looking for answers. >>> Peace Allen >>> >>> On Sunday, May 5

) for DB3 pin 4 to ground and DB3 pin 3 to ground. > > These measurements are to help diagnosis and fix your HL2 in the field > since it is out of warranty. > > 73, > > Steve

IPlease examine the attached document. It shows the testing I've performed thus far. There is still more testing to be done; however, the issue

> For DB3 pins 3 and 4, I measure 580mV peak to peak for both pins >>>>>>> referenced to ground. >>>>>>> >>>>>>

4 on DB3 >> it drops to 250 mV on tune function no signal. >> >> >> Art >> >> On Saturday, August 26, 2023 at 8:54:18 PM UTC-4 softerh...@gmail.

seen on DB3 pins 3 and 4 while trying the above CW key experiment. >>> 2. Since you reworked the AD9866, please send a high resolution photo >>> (phone photo is okay

>> DB3, Pin 3: >>>>>>>>> [image: db3.pin_3.png] >>>>>>>>> >>>>>>>>> DB3, Pin

The additional cable should have no effect on the output signal. It does, however, damp the input signal by about 3 dB since the feedback is parallel

Hi Guys, Another option would be to put the RP2040 chip directly onto the extension board. From what I've seen it requires minimal external

resistance from DB3 Pins 3 and 4 to ground is 31.2 ohms. Raj, N2RD On Friday, November 29, 2019 at 5:35:08 PM UTC-5, Steve Haynal wrote: > > Hi Raj, > > Okay. It is likely a problem

> > DB3 also no signal detected. There does not appear to be a > change in > > voltage at FB14/B66, which stays at 3V3, so U10/11 are not > changing over. > > >

>>> on DB3 and check the R69 resistor which sets the TxDAC output current. >>> >>> 73 de Claudio, IN3OTD / DK1CG >>> >>> >>>

Hi Group, Attached is a preliminary BOM for beta5. This BOM only includes components that the assembly house will install. There is now a wiki page

Hi All, The BOM generation scripts are working for PDFs. These scripts allow me to create custom BOMs for different build options, different suppliers,

Hello List, Although I'm not quite at the end of my to do list, I want to put the design files out for final review. Here is how you can help: -

Hi List, I've dropped the TX LPFs from the first prototype and am going with a 10x10 cm board at first. It still may take several prototype

Hi Group, The latest schematics are attached to this post as well as on github and on Google Drive . They contain the new power supply. The Cyclone IV