Hi Stefan, First: congratulations with your ferrite success. Very interesting, I have already dug up some ferrite bars here I moved up the frequency range of my grabber. 73s Minto pa3bca -- Ceterum c
Hi Marco, Sorry for the belated reply, but for some reason your mail was caught by google's spamfilter... (this is unusual, for Google rarely makes false positives) But I assume that you also use a (
Hi Stefan, Let me try to explain a bit better what I have done. When I disable the AGC of the FT897 I need to dial-down the manual AGC in order to avoid overloading the IF AND the AF sections when tu
Stefan, LF Not my own design, I dont remember exactly where I got it but I am pretty sure I stole the idea from the Internet and possible made some changes. The bc337 was used as I have a lot of them
Mal, LF, I am now using a single-turn loop in the backyard (hight abt 2 meters) instead of the miniwhip. One of these days I will test again with the miniwhip. First impression (testing the noise aga
Stefan, LF I use the 4C6 cores in my Lowpass filter for 137. I tried the FT50-43, and the 4C6. The latter needed about 44 windings for 80 uH so its AL is 41 nH/T^2. (varies a bit per core). The AL of
Hi Mal, See attached screenshot. nb: my frequency readout is a bit off, the 10 MHz xtal I use for the SA612 mixer needs some extra calibration. 73;s, Minto pa3bca -- Ceterum censeo Carthaginem delend
Sorry, Outlook tricked me again in the last mail, this link should work: http://www.pa3bca.nl/index.php?option=com_content&view=article&id=10&Itemid=14 73, Minto pa3bca -- Ceterum censeo Carthaginem
Hi Mal, Simple CW signal on 137 you say <big grin> Here it is not so simple. When I use the random length of wire over a tree i.e. my HF end-fed 30 meter long antenna -the S/N is at least 20 dB worse
Hi Mal, Good sig tonight. You are approx 20 dB above noise same as Stefan. -- Ceterum censeo Carthaginem delendam esse From: [email protected] mal hamilton Sent: Saturday, August 13, 2011 21:04 T
Hi Daniele, Yup thats the one. My shameless theft is exposed J I see that the only thing _I_ did was re-draw the schematics (I use Kicad). Of course I should have acknowledged the original author on
Hello Roelof, Yes, the noise that is picked up in the house will travel to the miniwhip, that is also my experience. (But now I am a bit confused how it then gets back to the RX, by capacitive coupli
Hi Stefan, I noticed I wrote ALC, but obviously this must be AGC. I installed Speclab, and did some tests with the 879. With the ACG off I adjusted the gain just to the threshold of (audible) distort
Hi Stefan, I will have the grabber run any time my rx is on, but I cannot guarantee that it is always available or that it is always displaying the truth as I will be fiddling with Speclab the coming
Hi Stefan, Well luckily most stuff for 136 is cheap, but it requires some() work You know what I think about deadlines :-) so Im not promising a deadline for my PA, but it is definitely going to be f
James (et al), Your measurement of DCF39 being 82 dB above the noise sounds about right. My first measurement (65 dB here in PA) was with the miniwhip only 3 meters above ground level and with many f
Hi Albert, I saw and heard your signal @ 137 Strong enough for a normal-speed CW QSO. If only my TX was finished :-) 73s, Minto pa3bca -- Ceterum censeo Carthaginem delendam esse
Hi Marco, There are several ways you can calculate, approximate or (best) measure the capacitance of the antenna @ 137 KHz, and from this capacitance the needed coil inductance follows. I have an AIM
