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Bob, The tranformers can be bifilar, with 10 turns of a twisted pair of 28 swg over an FT37-43 toroid. The transformer is marked as trifilar in the circuit because I have a box full of them from HF

You can edit your response and include the #hashtag in the subject line of your response when you reply to an individual email. I wonder what the 'subgroup' function offers - I haven't had a chance to

Just got a 256 GB uSD for my Pi.? Still waiting for the sBit itself to ship - ordered it a week ago, Gerry Sherman Sent by the Thunderbird

Check the file section under AJ6CU. The only problem might depend on how new your screen is. Those files were good with the Nextions with the firmware of several years ago. If you get an error when

I forgot to say, the only antenna using rg6u quad shield is my vertical.the rest is using ladderline. I have a simple balun to help match impedances and my simple match unit i built. 73Davidac9xh

I used to use an ammeter and a neon bulb. tune to max on both. Also,It helps to cut the antenna to band resonance.I have several antennas ,one for each band i run, also i use a homebrew vertical 3 ft

There was a setup doc that said initial current should be between 470-500mA. Adjust one pot for 100mA more. Stop. Do the other one for a total of 200 mA more than initial current. That makes more

I¡¯ve been following Jack Purdum¡¯s T41 SDR project on his group. Looks like they have a few board sets left for sale from their group buy activities. You can get them from K9HZ. Eight boards for

looking to upgrade my uBITX with the KD8CEC software, and all works well on the smaller Nextion, but want to upgrade it to the 5 inch display, and I need the file. thanks N2AIE Vince

I totally agree with Stephen and like the #HASHTAG idea.? I own 6 uBitx (2 v4, 1 v5, and 3 v6) and have an sBitx. 73 Evan AC9TU

Owning three uBITX's (two v6's and one v5) with a sBITX kit due next week, I would prefer that there be just one group, the BITX20, for all of them. *BUT* if we could all religiously apply appropriate

Ashar, That is not the output impedance of the amplifier, nor is it the effective load on the power supply. Almost all RF power amplifiers are specified for a 50 ohm load.? 40 watts to a 50 ohm load

The plans are clear to me except for T1 and T2. How are the trifiliar transformers wound? How many turns on what size toroid? Are 2 and 6 really unconnected? -- 73 Bob? KD8CGH

Ken, In Spain, then VAT tax is 21%. 270$ x 0.21 is aprox. 53€. DHL management cost could avoid it, but I would have to go to Madrid, do the management, lose a few hours, etc. It is the price of

it is possible that you might want to switch the audio output to a couple of different things.. check this out...

Most SWR meters (for the HF frequencies) don't measure SWR. They just measure how far off the antenna/coax load is from 50 ohms (reactive and resistive). The only reason they are fixated on 50 ohms is

Thanks Ken, N2VIP

As I understand it is for the UK calculated at VAT on cost and postage plus and admin fee for the courier company.The admin fee is to cover collection of and passing to hmrc with appropriate

I got my sbitx today, additional 95 euro for Irish customs. Welcome to the EU.

I have been getting 3D prints from my local library.? They have a much better 3D printer than I have and charge by the ounce. Ben