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Ron, Raj... I have a simple DDS design too, which doesn't need microprocessors: http://www.hanssummers.com/radio/dds/index.htm <http://www.hanssummers.com/radio/dds/index.htm> . It would be

Ron, Reminds me of the old days as a youngster building Valve VFO, enclosing it in a box etc.. For PSK: I suggest that you take this requirement to the another extreme and build a DDS VFO !!!

Hello Ron The crystal is 32KHz not MHz! Well, 32.768KHz to be precise, which is an ordinary watch crystal. The 1-chip stabiliser is a little sensitive to adjustment. The resistor ratios in the VFO

Thanks for advice dear Hans, Sure the instability of the vfo will increase the the frequency increase. I was amazed by the one-chip huff&puff circuit on your site with the 32MHz xtal. Effective and

Hi Ron Thanks for the nice complements about my website :-) I had a look around your website this morning, you have some very interesting projects there. I sent an email to a fellow who I know is

Dear Hans, Nice website with great designs Hans. I intend to build a huff-and-puff circuit (design by om Spaargaren PA0KSB) when i do not get sufficient stability from the circuit as shown in the

Dear Ashhar, It is an honour to me to chat to the designer of the bitx ! Compliments for the extensive info on the internet. I like the KISS (keep it simple stupid) principle a lot. I appreciate all

Ron In case you are not aware of my very simple Huff & Puff VFO stabiliser designs, you can read about them

I really appreciate your quick reply Raj, No you did not confuse me. This forum is alive ! Yes I used the ceramic ones for initial trails. I have some polysterene ones (old!! from Philips radios) in

Ron, This is probably because of ceramic capacitors being used the oscillator stages. Components that determine frequency must be ultra-stabe. Use NP0 caps, brown ceramics with a black top.

i was fooling around with a direct conversion receiver in my shack today when my four year old daughter came in with her friends to play 'wheelie train' (a noisy sport where each participant sits in

the 1 Khz drift is more of a construction problem that a design problem. I would suggest that you try the following: 1. make all the components connect to each other with short leads and without any

Thanks for advice dear Chris, Saw on the forum that the BITX17 already seems to exist! OK, past couple of days I started to setup the power supply unit capable of delivering the required

Dear Ron, splended idea to make it for 17 mtrs. In your message you asked for suggestions, you want to have more suggestions then all the postings in this newsgroup, including Photos, Files

Dear bitx20 homebrewers, I intend to build the BITX for the 17m WARC band (18.068-18.168 MHz). My ultimate goal will be to work psk31 with this splendid rig. Has anyone suggestions to convert bitx20

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the BITX20 group. File : /MFJ-9420-CW-module-1.gif Uploaded by : vu3wjm

HI! Farhan and friends, With BITX having become so popular CW operations I assume was simply matter of time. Over years many kits have evolved the same route. Among the commercial products Travel

How does one go about with full QSK on BITX20? There is very little switching around. the most crucial point to me is that the receiver input needs to switch from the linear amp's output to input.

paul, the PCBs have been printed component side! to mark the correct side, i had put the letters BITX in the middle of the PCB as a reminder so that it reads properly. I guess the fault is partly