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Hmm, the LPF's should knock out my? ? 45mhz + operating_frequency? burp at the start of a CW transmission, regardless of which filter is selected. Though the filters aren't perfect. Also, in an

Hiro san, A pi type tuner is generally in the same form as Low pass filters.? As such it can help with harmonics but lower frequency spurious outputs it will be less helpful. What you likely want is

Hi Al A few of us have the ubitx and bitx40. We had quite few people at the meeting, which is odd for the summer months. Anyways we have a few teens joining and decided we could do something they

I noticed this jump in reflected power on CW also. ?There appears to be no corresponding increase on forward power, so I am guessing it is due to the LPF relays. ?When the first CW character starts

That Nano clone looks fine to me. Note that on the new raduino boards that come with the v4 uBitx from hfsignals the Nano gets mounted on the other side of the main raduino board as per this post: ?

By rewiring K1 contact 12 as common and contact 14 to K2 contact 14 for receive. For transmit K1 contact 12 common to K1 contact 16 to Q13. Would this work to protect Q13 from strong receive signals,

The "glitchless frequency changes" thing means that when clocking digital logic you don't get a runt clock pulse. As it turns out, for small frequency changes it's a smooth transition, and a vfo sweep

Timothy, Many thanks for your detailed explanation. But I was wrong. What I needed to know was “pi-match antenna tuner”. Am I right that this type of antenna tuner suppress much spurious? Again,

Hi Ken, our little builder group in Barrie has been focusing on the uBitx and the amazing firmware from Ian KD8CEC http://www.hamskey.com/. A number of us also have the Bitx40 which works very well

Amen David A Posthuma, WD8PUO Sent: Saturday, July 28, 2018 11:07 AM To: [email protected] Subject: Re: [BITX20] Accidental Calibrate #ubitx #calibration Hi Guys, just a short update on my Tune-up

Thats the correct one Philip

I?m searching for a new raduiono Board, my question is this the right ? https://www.ebay.de/itm/Arduino-Nano-V3-ATmega328P-Board-5V-16MHz-Arduino-kompatibel-USB-CH340-/301943933929?oid=232526039194

That seems unlikely as the Si5351 itself is very fast. As the data sheet indicates, it has "glitchless frequency changes" in the microsecond range. That is why I suspect an issue with the firmware.

Hiro,? suggest you look at? ARRL antenna HB . You should be able to find some PDF on line .....copyright breach and all. (this was supposed to be a? PM But what the Heck) Gamma match generally used

The July 17 news shows a build with a CEC keypad on the front. I would like to know where the constructor got his keypad from. Andrew SM6MOJ

Hi, all. ? I am getting interested in a Gamma-Matching antenna tuner (manual one) for suppressing spurious in order to observe Japan ’ s new spurious regulation. ? BPF will be fine but I need to

Good info Tom. I still have the Pacific and most of the US between me and my lab but looking forward to getting into it in 24-36 hours.? WA8TOD

Bruce, In uBitx the audio amplifier stage is disconnected by K3 via M1 and M2. So there cannot be audio leak unless K3 is defective. The only other way is RF leak into the audio. Are you using any add

Not sure I follow. Let me check the mode button. Joe

Jack, I kind of figured that I was hearing QRP and crappy antenna too. ;) Some this I can make suggestions on but social engineering in not a? forte I can claim I do well. Maybe this helps, When I