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Hi Allard! Thank you very much for your help! I was ready to post the solution you found and the reason it happened, but you beat me to it. I had the 10 nF cap installed for debouncing and RF

Hi All, Is it possible to obtain a replacement Raduino board for the BitK40 kit. Mine has suffered from too much “experimentation” 73 John M0JBA

Hi Ion, that's great news! The explanation is as follows: The Arduino input pin to which the FB is connected, is normally HIGH (5V) when the FB is not pressed. However, due to the extra 10 nF

Here is a comprehensive build of the cheapo Chinese amplifier with a circuit diagram and confirmation that it works too!! http://pa-11019.blogspot.com/2016/11/diy-kits-70w-ssb-linear-hf-power.html

I’ve built two of the Hardrock 50’s. They are great amps and pretty bullet proof. I’ve used them on several trips outside the USA and they’ve done a great job of getting my KX-3’s signal

Just my 2 cents. After getting two versions of the "cheapbay" amp I can say the best thing I did. Bought a proper kit like a WA2EBY and built it.The Hardrock 50 was also a great amp but the cost is

I just received info that ebay will pay back all money as the trader had not provided any postal tracking number. Warning for the trader named kiss_buy. He seems to be on all major shopping sites.If a

I built the 70 watt model. I changed the 2 IRF530s to 4 IRF520s. The IRF530s oscillated and failed quickly. They also run very hot. The IRF520s run much cooler (2x as many junctions) and are stable

The 45 watt and 70 watt amps use the IRF530, and I own both. They do work, but not for long at the advertised power. It’s very easy to push too hard on the drive and blow the FETs. The 45 watt

Hello!! New uBitx V4 builder here. ?Instructions call for a plain board power up with no connections beyond power Jack. So I have no plug in cables at all. No ardunio. Nada. zip attached. ?With

That amp seems to be very similar to this one https://www.ebay.com/itm/Upgrade-45W-SSB-linear-Power-Amplifier-Kits-for-transceiver-Radio-HF-FM-CW-HAM/181893455505?hash=item2a59b1de91 but without the

I ordered this PA and a low pass filter board three month ago. The items have not arrived. During several weeks I have now had email discussion throw ebay with this? trader to either send me a

Ludwig, John VK2ETA just posted a reminder of the diagnostic software he had created to test communication between the Nano and the SI5351 in a different thread.

Hello Mike,? You may also try to see If the Arduino is communicating with the si5351 before changing the nano. In the files section I uploaded some time ago a diagnostic sketch that tests if the i2c

A while back 20m was almost dead for me.? Thought it could be the band conditions.? I live in a mobile home park and my antenna is 2 pairs of ham-stick type mobile antennas set up as 2 dipoles.?

Allard, I reverted back to 1.09 (the other version that I downloaded some time ago from github) and I run through calibration. Everything works as it should now. I'll pass on 1.27.7 for now. Thank

Actually, Arduinos and Raduinos are ESD sensitive parts, although most of us don't always treat them that way.? They are so inexpensive and available that ESD damage prevention measures may not be

The wire colors have the same order as the resistor color code: black, brown, red, orange, yellow, green, blue, violet.? You labeled the connector "Raduino," so the "R" is at the violet-wire end, and

Ion, Do you see "loading standard settings..." on the display each time you power on the radio? If so, it means that for some reason your Raduino restores the "factory" settings each time at power on.

Hi Ludwig, Surprised of no replies on this, so I'll throw out a few ideas to stir up the conversation. From your description, it seems to be an issue with the I2C/SI5351. 1. I?doubt there is a