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I'm confused too. I can't seem to find the version of the schematic that you referenced; still trying to find my way around here! So much to digest! I thought I read somewhere that the red wire from

I had converted the same sch into B&W and here it is. -- Regards Sarma

Before you yank out the IRF, do this check: Power the board and final, disconnect MIC and with PTT pressed check if 12V is getting to the IRF drain.

I totally agree with ekelly. I have had almost exactly the same experience with lifting a trace from the top of the board while focusing on the bottom of the board where the solder pads are. The

I have some IF510's on order. I hope that's the problem because it will be an easy fix. It's worth a shot.? I've never tried transmitting with this radio without a dummy load attached.

IRF510 - A tip for those replacing the transistor. Don't try to remove it with a solder sucker. The pins fit too tightly into the circuit board and unless you have a way of heating all three pins at

Usually, ctrl and + will magnify and ctrl and - will make it smaller. Good luck, Marco - KG5PRT

It sounds like the IRF510 is bad. Do you have a transistor tester to check it? They are very sensitive. I still have not put my radio together, but a bought 10 IRF510s to experiment with and to have

Thanks Jack Adrian

Dear Farhan, I'm now building the PA but I'm in doubt about the two unmarked capacitors at each side of the input attenuator, should I use 0.1uF each? Thanks. Dan, HK4DEI

It's been posted before, but I still think this is a nice case. https://www.banggood.com/Electronic-Plastic-Shell-Cartridge-Handle-Project-Case-Desk-Instrument-200x175x70mm-p-1035473.html?rmmds=search

Fits like a Glove! Jameco, I like them. They upped the price a buck since I bought. Warning, the Bottom (White) is Al. But, the Top (Black) IS STEEL. I know, I put my speaker there! No Nibbling on the

Nope. The TFT displays are 2.5" high. Jack, W8TEE To: [email protected] Sent: Saturday, July 8, 2017 6:21 PM Subject: Re: [BITX20] A suitable case ? Raj: Thanks for the tip. ?I wonder if there would

Ok, just tested it. I have 12v on pin 3 when I key up the mic and I get 5v out on pin 1 when I key up the mic.

Yes the setting at 40Hz is off a bit and same with 50Hz it seems like if i could find a middle ground all would be spot on. David

Raj: Thanks for the tip. I wonder if there would be enough space for Jack Purdum's TFT display?

Thanks Jack Joe VE1BWV econjack@...> wrote:

Hi David, you mentioned your BitX is 45Hz off, did the calibration procedure not work for you? Or do you mean that the 10Hz precision of calibration procedure is not sufficient? Calibration currently

If you're viewing it from the main site, try this direct link to the image file: http://www.hfsigs.com/bitx40v3_circuit.png then click over it to view full size on your browser, also, every web

Is there a circuit diagram with 'hovers' over the components? My eyesight and computer schema do not lend well to viewing the diagram at hfsigs.