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There have been several recent postings on this question. The output of the 5351 can be set at different levels. Do a search of recent conversations on this reflector. 73, Todd

Thanks, I'm aware of the article, what I'm asking is, who has built it and is using everyday, and how do they like it? Does it work good? I've built a lot of audio derived AGCs and some raise the

See this article for AGC - http://bitxhacks.blogspot.com/2016/11/agc-for-bitx.html BITX20@...> wrote:

http://n5ese.com/rfprobe1.htm http://www.qrpkits.com/rfprobe.html BITX20@...> wrote:

Has anybody built and installed farhan's AGC? Does it work well? I think it's high time I install one. Joel KB6QVI

My first version of the Bitx20 is completed and works very well (I just made the receiver part), it was made using through hole components on individual pcbs that plugged together. My next version is

Could anyone in the Bitx20 group know how to send me the Bitx40 kit? After 04 days of purchase no return from Hfsignal. 73, Antonio

Anymore ideas on the low power problem? Only getting milli-watts. Adjustment of the bias pot seems to have no effect on the supply current. A loud HALLO only gets a small flicker on the power

Hi all I want to clarify a few things because there appears to be some confusion here. I have been working with the Si5351A for a long time. The QRP Labs VFO kit http://qrp-labs.com/vfo

Makes sense. My suggestion requires more fiddling. And there's something to be said for leveling the output, considering the various users and their input solutions...the real key is the input level

john, the reason i elected to put the dds into the VFO injection is that, even a very small signal will drive the transistor to limiting. So, all drive levels will be the same out of the VFO

L4 is in the center of the board, next to C93. How do you know? Tune to a frequency and put your finger next to it. The VFO will change frequency violently. If you are going to use a DDS, the VFO

you must remove the L4 for the dds to properly work BITX20@...> wrote:

I am finding the sensitivity to be very poor with the DDS. Did your sensitivity improve when you removed L4? And, is L4 the coil that is right next to the DDS jack? I can't see the markings on the

Precisely. Each rig is slightly different. You must choose the sound you want to hear, and adjust the signal to fit the slope you want in the passband. If you are happy with it the way it is, leave

If you attach the antenna, does the noise go up substantially? If yes and if you can hear only CW stations but no SSB then you have to just move the trimmer gently to cover the SSB portion of the

Same issue here. Can barely make out station that is s7 on store-bought rig.

Someone has probably mentioned this already, but out of the box, I’m not sure it tunes very far into the US phone portion of the band. Sent: Tuesday, December 06, 2016 9:33 AM To:

There is a longer explanation to this. The crystals we use in the BITX are microprocessor grade. This means that they are not very precise. Uma is the crystal sorter. She takes a bunch of 1000

OK I am confused. Isn't the IF 12 MHZ? The 12 MHZ is mixed with a BFO of 11998.8 KHZ giving a 2.2 KHZ audio passband? 73 Ken BITX20@...> wrote: