Tried several times to request that mails should be sent to my home email address, but so far - invain, it is incorrectly sent to work email address. Should this cause some problems with automatic 'o
To All... My The low frequency experimenter's handbook was published in 1995, feel it is very much outdated, are you talking about this book or is it a later book? 73 Jan-Martin LA8AK --Opprinnelig m
Hi It seems to be some problems with expressions. My first reaction is as simple as saying that "if it is three variable" you don't know what makes the improvement when you change all three at the sa
it was an article by W7ZOI in QST sometime in the early 80's for a dipper using a signal generator. I tested the principle for 3-100MHz, but it is no reason why it shouldn't work on lower frequency.
Can't see any arguments against my version. But apart from telling that you disagree, you don't give any related reasons. I already agree to the balance, but using a balanced amplifier for a balanced
Not so sure about the balanced pre-amp, it doesn't makes double balance, only one stage should be centered, when the aerial is balanced - the connection to once side is just as good as balanced conne
it depends on your fingers, "tnx" is usually easier to send without wrong letters than TU and TKS for operators like me 73 LA8AK -- J M Nøding, Datakvalitet, Kristiansand (Baneheia) http://tts.teleno
fb, but suppose the values of the noise generator are for the range 3-30MHz, the coupling capacitors must be increased for VLF 73 Jan-Martin, LA8AK --Opprinnelig melding-- Fra: [email protected] [mail
Tnx Also considered setting to spread spectrum for the clock osc, but we didn't find how to deal with IBM Aptiva PC, hi (The two PC's types with most problems seems to be COMPAQ and IBM types, but th
Have a steady tone around 136.5kHz. It is definitely from my PC, and the level was much reduced when the frame aerial was moved out into the garden, but still I must switch off the PC when listening
well, gif type files are smaller, don't really understand why it should be jpg? 73, Jan-Martin -- J M Nøding, Kristiansand Hello Cesare I write a column each month for the RSGB magazine, RadCom, call
Hi 'LF-Group'! Could scan some pages if you know what you are after, but have so much demand for copies of Racal and other receivers that I can't overcome. For the DIN-socket it not much to find, onl
Seems TEA6200 is an interesting device for making the field strength meter, somewhat different from PAøSE Dick's, but I believe it could be easy. Hope to get some samples for test. TEA6200 has a high
This is the recommended design for a broad-band amplifier, LA7MI has a very strong signal on 96MHz, so he added an RFC at the input to form a lowpassfilter. I do have very strong signal on CEPT TV Ch
Hi planning to build a VFO for a boatanchor VLF receiver covering 50-140KHz, first IF is 169kHz and it was originally using xtal control. The VFO must cover 220-310kHz. The variation needs to 85kHz,
TNX This was constructed in times where we listened to BBC2 and no lower frequencies, so the capacitors are probably small. Perhaps a resistor in series with the 10nF capacitor to adjust the positive
Hi, I don't see the point in using NPN devices (PNP are better for this purpose), you would probably not have more than 0.5x voltage gain A source follower has incredible low gain - even when driving
Using the sigview program LA1TN has shown that the shift is 330Hz, the highest peak is 138.8kHz, see attached file 73, Jan_Martin LA8AK (in JO38XC) N4623-Kristiansand (tel.: +47-380-87178 Home)(38052
Hi, noticed something I'd wish to comment further, ref. quoted text from http://www.alan.melia.btinternet.co.uk/BR-t-Notch.htm As far as I can see at the moment the only problem is that the output of
Hi all, It is a problem that you have to attenuate 138.8 and the lower shift frequency, which is active every tenth seconds or so. So I agree to the solution Hans-Joachim suggest using bandpassfilter
