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Ken:?? I think?sideband inversion is a lot simpler than that and can easily be explained without resort to "negative frequencies." Just consider an LSB signal coming in at 7.2 MHz.? It will be

What is the email address for hfsigs? it is cut off at @ in the messages. All I see is hfsigs@.... David VK5PL

So while I wait on replacement parts for L2, I'm trying to get some learning experience out of the radio. I superglued L2 back together and it looks pretty good, though I'm sure it's not ideal. I

Awesome work ! Hope firmware release will also support 2 Meter SSB ? It just coils & final transistors that needs to be play with... 'Repair & Reuse or Recycle E-Waste'

Ashhar, In the circuit description L4 is still there as is the tuning know on the vco. In the wiring read UME, assume you refer to VOLume. Maybe introducing the rotary/push button

Ron, This documents what you must do to the boards that are shipping from now on. The new boards do not have the L4 soldered in. Can you spot me in the picture? - f ronvandoremalen@...

Ashhar, Not sure, but the tuning pot and the regular vco in combination with the DDS signal. Isn’t that interfering. L4 shouldn’t this be removed? Still see the tuning still in the scheme. Think

Great work Farhan! Looking forward to paying radio with it!

thanks, fixing it. anything else that slipped past? - f [BITX20]" <BITX20@...> wrote:

Hi Ashhar, In the calibration section, last line: Short the brown wire of the 8-pin Raduino to the ground Isn’t this again putting the Raduino into Calibration as the next lines states you should

Jerry, hfsignals@.... This is only available to people who have already bought a BITX40. As you can imagine, 14 dollars doesn't cover the full cost. However, this offer is worked out to keep the

What is the email address for hfsigs.com? Can we get an "add on" Raduino board and connectors and use Paypal to pay the $14? Tnx Jerry AA1OF/6

Comrades, The upgraded BITX40 has been released. Check www.hfsigs.com, you may have to refresh the page with a Ctrl-R or something. RADUINO! The new BITX sports the Raduino, a tiny board that

here is some brief stuff you can try, 1. I hope you have connected the PA power line. When you speak, does the current change? 2. Set the bias again. Insert an amp meter in the power line. Start

I'm intwreated in getting on of these trancievers. Fully assembled. I'm disabled and low income,! I cannot build anything. ,can somebody donate a working version to me? Randy Ka4nma

Bravo, Ken. You have taken on a huge chunk of RF Engineering, to say the least. john AD5YE ---In BITX20@..., <chase8043@...> wrote : Hi John Tonight I gave a small presentation on

One of the things that happens with crystals is aging. They will shift their frequency output over time. I always keep my crystals oscillating for at least a day, and then measure them again. They are

blockquote, div.yahoo_quoted { margin-left: 0 !important; border-left:1px #715FFA solid !important; padding-left:1ex !important; background-color:white !important; } I have the same problem. Receive

When I reread my postings concerning T5, T6 and T7 in http://www.hfsigs.com/bitx40v3_circuit.pdf http://www.hfsigs.com/bitx40v3_circuit.pdf, I see that I come out quite frustrated and maybe even

Arv. Well, your writings cover the RX, but not the PA transformers T5, T6 and T7 in http://www.hfsigs.com/bitx40v3_circuit.pdf http://www.hfsigs.com/bitx40v3_circuit.pdf And it does not matter if I