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try large capasitor ie ?50uf ?25 volt working ? ? across power supply.............

So that means that unbalancing the mixer will never be a legitimate way to introduce a carrier for tuning purposes? Roy WA0YMH

I also have that case, too, but I'm adding a Muppet board and there wasn't enough room for both in the Banggood case. It is, however, a very nice case. Jack, W8TEE To: [email protected] Sent: Monday,

A similar case is on Banggood but check the dimensions. http://www.banggood.com/Electronic-Plastic-Shell-Cartridge-Handle-Project-Case-Desk-Instrument-200x175x70mm-p-1035473.html?rmmds=search Buck,

Good morning Larry, Success! Using a battery cleared up the tone. Now on to packing it up in its enclosure. Many thanks to all for helping including Jerry! 73, Chuck K3VPZ

I was looking for the order, but can't find it. The supplier was Allied Electronics and the case was:? http://www.alliedelec.com/pactec-cm69-240-000-k/70080024/ They have a bazillion cases. If I can

FIrst I am suspecting the power supply. Second disconnect the volume plug and see, I would suspect the tone will be there if the PS is at fault. Third If the tone stops then suspect the preamp

Try a battery supply. My shack supply does not play nice with the BitX. A small wall wart 2A, 12V is silent. I get tone with the shack PS. Larry KB3CUF

Good morning Jerry and the group, Had to stop last night, having probed for nearly 10 hours. Jerry, my trouble shooting is hampered by not having an up-to-date schematic. My board is a Bitx40 V3. It's

The current drawn will depend upon the peak to average ration of the voice characteristics which is different for every individual. That is why a speech processor would be a great help to maintain a

It is standard practice that to eliminate any source of noise the decoupling has to be as near the source as possible using capacitors suitable for the frequency/ies involved. This also aids

Hi, Has anyone had any success in getting the bitx40 running with VFO at 19Mhz? I tried last night and observations were: Drive out of the raduino needed to increase to 4ma before any noise came out

You will find a single 12Mhz xtal with some components next to the 860 - thats the bfo. 73 Raj

Hi? John , I?? agree with the explanation for 100% . This is also my ecperience Marco , France

Hi Jack, Slightly off-topic, but may I ask what enclosure you are using ? regards and 73 Leo de Blaauw - PD1LDB

Hi, I'm having a bit of trouble locating the BFO on the bitx40 board to take some measurements. From looking at the circuit diagram it seems to be around the LM386 or D15, is that correct? I'm just a

I have been advancing the silver trimmer to the point of achieving a amp meter reading of 1 Amp plus a little bit while speaking up into the mic. Is this overdriving the BITX 40? I have found that it

John, The two section low pass filter is a standard across a number of transceivers build and sold in the USA. Our harmonic suppression is just within the legal limit. Here is the scan as I had

The center tap that takes the audio from the mic. A caveat though, the carrier is on the skirt rather than in the center of the filter. - f

4.7K resistor from center tap of R106 to 12 volts? 73 Ken VA3ABN