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Try this. Go to Windows Control Panel and then to Device Manager go down to Ports and expand the list.? With the nano disconnected note the list of ports.? Then plug the nano (powered up) into your

Plug USB in and out.? If you don't get a new unique port, then that is the problem. Maybe un-plug all your USB devices and see if moving Raduino around works? You must see the port in the

I seen that but I shy away because of the GPS correction . ..wonder if it can be disabled easily? Thank you Mike

I'm planning to use these for both rx and tx on the 40-20-15m bands...retloss never rises above -13db, that's good enough for this market

I'd be curious to make a similar topology HIGH pass filter, for when I put my BitX onto the higher bands.. -- 73 de Noel, ZL1NC

I'm new to this. I just got my Bitx40 in and built in a box. I'm trying to upgrade the nano but I cant get past selecting a port. I'm using Arduino IDE for windows. When I go to port it is not

Does anyone know what it is? ?It has remarkable characteristics. ?I've extrapolated it to make equally performing filters for all the other bands (confirmed with Elsie) but would like to know what

And this is why I love this hobby and this list. Thanks Mike! regards, Richard

From other projects I have made with custom EEPROM settings, I have found the EEPROM is unchanged untill there is a write or put performed. -- 73 de Noel, ZL1NC

You might put a 1K in series with the input. Thus it would take a larger signal but load the test circuit less. Try on the gate of the IRF510? That's a pretty good stiff signal at your transmit

The sketch by Gene Marcus W3PM can be found in the group and does what you want. v/r Fred W4JLE Sent: Sunday, April 2, 2017 7:53 AM To: [email protected] Subject: Re: [BITX20] Raduino BFO hook

Nothing in particular, trying to learn.

What do you want to measure? It has 100 Ohm input resistance on input transistor base ( Cap Coupled).? So you need to find a signal somewhere that this low impedance won't load down? Mike, WA6ISP

Richard W2KAP It is normal to connect your frequency counter to the VFO output, and to program in an IF offset. This lets the counter tell you the operating frequency when receiving and

I am working on strengthening my kit building skills before I tackle my next Bitx40, so I have built the qrpguys <http://www.qrpguys.com/> frequency counter and should have the parts for a coupla

If interested in pushing the IRF510, read what kb1gmx has to say in this old thread: ?/g/BITX20/topic/4104262#14524 ( /g/BITX20/topic/4104262#14524 ) Better yet,

Those eBay ones are nifty, I want one.? But, they are 50 Ohms, so not so good at poking around circuits that may be several K Ohms? Mike, WA6ISP

Dennis and I are finishing up work on an AGC board, from which we grab the S meter data. By having the takeoff for the AGC in the RF chain, Dennis has a pretty good S meter (i.e., not a VU meter).

If you must have a log amp, I'd make pads for an optional AD8310 (the improved and cheaper AD8307) ?on the main board and have it drive a Nano analog input. ?Make a dandy S meter when not being used

Etherkit has: ?https://www.etherkit.com/rf-modules/si5351a-breakout-board.html