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https://www.instructables.com/id/Mini-Oscilloscope/?utm_source=newsletter&utm_medium=email _._

Hi Tony! Yes, I have a couple of test programs. Email me? (good on QRZ) and I'll send them later. Working on an antenna at the moment. -- John P. WA2FZW

Hello John P, After all that about the attenuator I hesitate to ask; but you did also mention that you are, or were, also working on a Si4432 testing routine. One independant of the Tiny SA could be

Last night I finished a new signal generator S/W for an RFzero, ATSAMD21G18 that is also used in the Arduino Zero, for controlling an Si5351A. The signal generator can besides the standard carrier

Thanks for allowing me to join the group. I have, in the past, built an early version of the PHSNA and rewritten the Arduino code to suit my purposes.? My main goal for the instrument is to test

Some suggestions Reduce the length of the wire to almost zero Bold a heatsink to the side with the resistor -- HBTE Files section: /g/HBTE/files Erik, PD0EK

That won't handle more that 50W continuous and probably has terrible SWR above 20MHz. Quick and dirty solution with RL > 40db up to 50Mhz good for 100W continuos (with cooling):

Hello,New to the group. Here’s a dummy load I created.?It’s a 50 ohm 250W resistor connected to a BNC bulkhead in an aluminum case (you can see the model number in the first photo).Happy to have

Thanks for accepting me to the group, Steve here in Florida, KA4NRF. Getting back into amateur radio and building projects and always loved the idea of homebrew test equipment. Steve KA4nrf

There are many many major improvements in this version! We did a lot of general cleanup and re-structuring of the code to make it a bit more efficient and a lot more understandable. Moved all the

Version 2.9 Is Available Phil (N6WKZ) found a minor bug in the code! The time was always slightly more than a full second behind the actual time. This is fixed in Version 2.9 as well as it can be

Hello Erik, Thank you for that, it was very helpful. It never occured to me that the Banggood module, which looks like all the others,? would not be based on the 4432. I will go back and check but

Hre you can find the data sheet of the CMT2300A https://www.tme.eu/Document/ff6f63367594d7dfc3acfb9bd3461da3/CMT2300A.pdf I'm not sure it is SI4432 compatible. -- HBTE Files section:

Hi there, I have a problem with Si4432s which someone else might have the answer to: Initially I bought two green boards with the identifier HW-240 printed on them. Only one gave an output (of -15dBm

Marcus You could have a look at the required drive level for you mixer. If? it is too low harmonics will increase with higher frequencies. -- HBTE Files section: /g/HBTE/files Erik,

Hi all again, I did another thing instead. I replaced the LO with another signal generator. One with lower harmonics, 42dBc compared to 24dBc. The result is very similar to before, so now I've

HI all, Erik, I realize that LO harmonics is also generated in the mixer but would it not be beneficial to remove some of them beforehand? I'm aware of the fact that most mixers works better with

Hi Marcus. Filtering the LO is not a good idea as the LO harmonics will also be generated in the mixer as it is overdriven to have good switching. So a low pass filter at the output is the best option

I can newbie chime in on this one. I still haven't gotten past my filter designs, though did receive the 5.5x2.5mm barrel plug and opened up yesterday for the 64.5W laptop power supply to power the

Hi all, I received my oscillator modules today and hooked them up: And connected the IF output to the spectrum analyzer: So here we can see that the generated output has harmonics around 40dBc but