Mal, 2.5mm Am I going to have to send you a loading coil made from #12 copper and and Bill. Try HW #12 pure copper tube, not the alloy mix you get these days for commercial wiring and plumbing, even
I have today been testing a Siemens Pegelmesser D2155 as a LF receiver. Freq range 200 hz - 620 khz. B/widths 20 hz and 3.1 khz. Mode lsb/usb. This instrument makes a fb LF receiver for 73 and 136 kh
I'm a little surprised the measured conductor resistance a loop was significantly reduced with Litz wire compared to solid wire with the same size and same insulation. Litz wire *sometimes* offers h
Mal, Yesterday I determined that my paint stripper actually did work to remove the covering on the Decca 729 litz. It took a lot more applications and brushings than I originally thought, but I was
<< I am puzzled why they are putting this stipulation on bandwidth, which I do not believe anybody else has done. >> You've heard of the philosophy some folks have over here? The one about: "the busi
Dear Dave, LF Group this I suppose it makes sense - otherwise someone could decide to monopolise the entire band sending SSTV or something. It's very easy to measure the bandwidth of signals with sp
Melting and burning the aluminium foil is certainly a problem - the copper foil seems to withstand any amount of heating with the blowtorch, and the same piece can be used several times. There is a p
The method that I previously described to remove the enamal from litz wire using Methylene Dichlorine found in paint stripper works every time for me on the heavy Decca 729 strand litz wire. With car
Hello Bill and all To remove the enamel from litz wire I use paint stripper called nitromorse. Remove all the cotton/plastic insulation from the cable end to be soldered to expose the multi strand en
Mal, Before long two way on LF across the pond will be the norm !! 73 de Mal/G3KEV Yes, this is great! ...........and we will finally get the opportunity to show you guys over there how a TX loop bu
Since installing my 90 metre perimiter vertical loop some months ago and resonating it on 136 khz, I have observed that it is just as prone to QRN/static as the vertical. In my case there is no advan
Good news for the LF community that the USA will soon be operationg on 136 khz. There should be some excitement later on in the year when propagation is suitable for two way qso's on the band between
Big fires USA Big Loops and big 47 Amp Sparks Loops coupled to trees I think I mentioned this could happen some weeks ago. Perhaps it is just a coincidence
Dear Mal, LF Group, Something is wrong if you need to adjust the tuning within this range - the output should be flat within a fraction of a dB over the whole band without re-tuning. Nothing wrong,
For info/Decca coil mods. 54 uH coil using powdered iron core (T200 - TYPE) resistance 0.4 ohms using 18 mm enamelled copper wire, single layer. 54 uH coil using original decca paxolin former and ori
Due to email received, mostly private about the DJ coil mods especially the ferrite approach, the required information follows. Models using the BCB capacitor board, total series capacitance 24nf nee
Has any Decca Jeep owner considered using ferrite cores for PA coils instead of altering the existing poor quality paxolin air wound devices. The originals in spite of being wound with litz wire are
You can laugh now, but don't say I didn't warn you to stay away from those antenna terminals once we start rocking and rolling over here at 136 - loopwise, that is! ........ because that's the only
snip I used to get that with my old AM Tx in the 50's! Cause: Lack of grid drive and improper loading/tuning. I wonder which it is now... You are correct, it is no doubt still the same today. Adjust
