Any suggestions for a DX-pedition antenna which is easy to built up, and as efficient as possible? Should be capable of withstanding 1kW. 73 Dick, PA4VHF (LX/PA6Z..........)
Hello ....... I am looking for a source to buy 3C90 (or 3C85) toroids, 58mm diameter. Up til now I can only find 'Spoerle' , but I have to buy at least 36 of them............ Is there any other compa
The thing Mal, G3KEV, wrote reminds me in how I had troubles to 'connect' two TV-U-cores together. Any suggestions how to stick them together in a good way? Even the slightest variation in pressure s
Hello all, I'm building a new (and larger) 136kHz transmitter. The output circuit is the same as the one used by G3YXM with 4 times IRFP450. Each FET will get his own gate input resistor (6R8) and ga
Would like to know more about your TX loop Dave. What size, material (isolators??) and especially, how do feed it? I'm asking this because search for a possible DX-pedition antenna. 73 Dick, PA4VHF
Thanks sofar all for the comments on the G3YXM amp. I will use a single 58mm 3C85 core as an ouput transformer. Primairy coil will be using 2mm wire, secundairy will be 1mm wire all PTFE insulated Th
Hello all, Thanks to the help of Jelmer, from the PA6Z contestgroup with his camera I'm able to show some pictures of the new 136kHz station I'm building at the moment. I hope to have finished all st
Hello all, new pictures have been uploaded to the PA6Z website. I'll add comments to it later. About the supply voltage: it will be 50-70Volt. 73 Dick, PA4VHF
Hello, Some more info: I measured the voltage available for the meter circuit at low and high power level. With 60W DC input I have around 3 V and with 400W DC input this goes up to around 9 - 10V My
Hello all, I almost finished my new 136kHz transmitter, and after several hours of fault-finding it seems to work upto 600-700Watt DC input. However, I do have a 'problem' .......... Instead of using
Hello some new pictures and text are available on the PA6Z website. Meanwhile I'm busy finishing the front cover with all controlls, meters etc. Still plenty of work to do, like wiring all stuff. 73
Hello all, during the fieldday from the local radioclub, PI4ZUT (PA6Z) in the weekend of June 10th and 11th, (yes the weekend after the IARU Region 1 fieldday) I plan to set up my 136kHz station in o
Hello all, I will be testing my new 136kHz station this weekend using my own call: PA4VHF (/p) as well as PI4ZUT. All operation will be in 'normal' CW on 136.50kHz +/- QRM , so not QRV in QRSS!! I wi
First off all thanks to Mal and James for picking up my signals. Thanks Alan for your comments. Well, I did tune the system with the help of a low power TX before running high power. I think the prob
Hello all, Very interesting to see the QRSS activety around, like from the PA3's. It would be interesting to know what power and antenna are used by stations, so please add this info when announcing
Hello all, I wonder if there is any talk-back/sked frequency on HF (160, 80 or 40m) for 136kHz experiments. Might be usefull next weekend during my 136kHz tests. 73 Dick, PA4VHF
