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This is a good question, but I think that the answer is No at the moment, in the schematic description on hfsignals site i can read? some tipa :"AGC as audio" in second channel of tda2822 and an IF

Search for AGC in this forum and you will see lots and lots of schemes to implement it. The thread I pointed to is just part of a discussion, I think somebody renamed the thread and? we continued the

Was on at 3PM. Nothing heard! I'll try again at 7PM. Meanwhile, my logging program lost all my data. If possible, could anyone I've worked in the past few months; particularly bitX to bitX send me

Ordered ! Can hardly wait ....so went with the quick shipping !

No AGC on the production uBitx. The original schematic for the uBitx here: ?http://www.phonestack.com/farhan/ubitx/ubitx.html shows the second half of the TDA2822 used as an AGC amp, attenuating the

Hi Rob Thanks for rolling up all that AA information. I'll read these over and try to digest them. I vaguely remember some of the conversations but I think I'm getting to max saturation. Got so many

If so could it be adjusted, with a panel mounted pot. Phil - G7BZD

Hi, Does the uBitx have AGC? It was discussed in some of the previous threads, but the website only has this comment: "The audio amplifier uses one section of the TDA2822 – a quieter device

All: The good news: I just ordered a mega-munch of 3A, 30V polyfuses that I'd be happy to share for $1, including domestic shipping.The bad news: They're coming from China, so will likely be several

The Raduino is actually a Nano and some warnings can be ignored (e.g., those associated with EEPROM). If you're getting errors, my guess is they are associated with libraries of some sort. Some

Yup, a Polyfuse works great. Can add a resistor and red LED across it as an idiot light so you know when to ?execute the dope-slap. (Can also do that for a fuse) Though Farhan is looking for stuff

Agreed! One should always fuse anyway. My favorite is the Polyfuse. Self-resetting, cheap, small, and easy to mount. Never be at loss for a replacement. Used them for years. Never lost one, never lost

What version of Arduino do you use to compile the code on the new website? I have ordered the new BitX and getting ready I downloaded the code and get all kinds of warnings when I compile.

It's pretty easy to find a PFET that can handle a Vgs of 20v So a circuit like this would work fine for the main rig without the zener trick, leave the IRF510's to their own devices.

I've been using KC9ON's FET-based reverse polarity modules.? They're inexpensive, quick to assemble, consume very little energy, and the SMT version is

That sort of thing can work, but I'm not sure about "best" in this case. First off, it's not at all obvious how the heck it works. ?And I think it is drawn incorrectly. I believe the source should

Jerry KE7ER wrote… I actually removed all un-used wires coming from the Raduino. It’s easy enough to re-insert them if ever needed. -- 73 Keith VE7GDH

Having reverse polarity protection OUTSIDE the box is poor engineering practice. Power cables can and do get lost. In addition, let’s say the rig has a polarized plug so it cannot be reversed. What

Colin The MOSFET solution looks good. I will try that. Power MOSFETs are not very expensive. Should be interesting to smoke-test the protection circuit. 8-) Arv _._ wrote:

I use a 2 pin polarised plug, similar to a microphone plug, touch wood never failed me yet. Phil - G7BZD wrote: