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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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9th Sep 2017, 7:20 pm | #1 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Libuse Spy
Hi
I've made the Czech Libuse. What I'm now looking for is the history !! If it has any. |
9th Sep 2017, 9:52 pm | #2 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Re: Libuse Spy
hi
I thought Id best put some photos of my project on line. I cannot really put information as there is not much of it about. Pete G4MRU |
9th Sep 2017, 10:15 pm | #3 |
Dekatron
Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,274
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Re: Libuse Spy
HRO knobs?
Peter |
9th Sep 2017, 10:21 pm | #4 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Re: Libuse Spy
hi Peter
Yes probable HRO but you can only use what you have. pete |
10th Sep 2017, 12:55 am | #5 |
No Longer a Member
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
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Re: Libuse Spy
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11th Sep 2017, 2:43 pm | #6 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Re: Libuse Spy
hi.
Yes it was home made for the para silver network CZECH REPUBLIC. But it was a disaster. The RX was rubbish so it was taken out and the TX was far too powerful running 25 wtts SOE dropped them a Halicrafter RX. But Not many survived the landing !!. The group were betrayed to the Germans Most if not all were shot trying to escape. The frq was 80mt and 40mt. The main problem was the radio itself. It had a power supply for the TX and another for the RX. so well over 1000 volts DC. NOT A GOOD IDEA. .. Not to mention the gross power. The Germans could DF it from Poland. Pete Pete |
11th Sep 2017, 10:55 pm | #7 |
No Longer a Member
Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
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Re: Libuse Spy
Pete, that is really interesting and its amazing that they made the TX 25W. (I have an NZ made wartime transceiver , ZC1, with a 6V6 output & modulator, and its only a few watts, its battery operated) I guess the Libuse Spy ran off mains power to get that output. Projects like yours with that sort of history are wonderful.
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12th Sep 2017, 1:54 pm | #8 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Re: Libuse Spy
Hi
Yes I agree with what you say. I got in touch with the group who say they have the original. However he will not pass me more information. Strange ! this radio is though in the Wireless for the Warrior supplement so it is a true spy radio. Peter G4MRU |
18th Sep 2017, 7:16 pm | #9 |
Nonode
Join Date: Jul 2005
Location: Hull, East Yorkshire, UK.
Posts: 2,087
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Re: Libuse Spy
Is that an 807 as RF o/p. My goodness! I thought a spy set was only a few watts, just enough to travel the intended distance. That transmitter was making the Abwehr's job too easy. Were they reckoning on needing that power with an inefficient aerial?
I wonder how long it would take to get a 'fix' on the signal by triangulation? |
19th Sep 2017, 3:20 pm | #10 |
Rest in Peace
Join Date: Dec 2007
Location: Doncaster, South Yorkshire, UK.
Posts: 385
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Re: Libuse Spy
Hi Neil.
Well yes the group did not last long. The were all rounded up and shot "trying to escape"! The tale for this radio is that it was found in a farm out building attic, all intact. Yes it uses a 6J6 driving a 807 giving out 25 watts. It did have receiver built in it, but it was found it was unusable, hand capacitance being the main culprit. So it was removed by SOE. Also the tuning was really bad. I use a crystal spotter / marker and that works very well. However the main killer with this type of radio was that the TX and RX had their own power supply. So 1000 VDC could go across your fingers. I'm still working on it. So I'll put photos here when it's finished. Peter G4MRU |