[MRCA] Torn Fu.d2

[Captain D.]

Hello Tom,      The manual gives a range for this radio of 10 km ( about 6 miles ) and a power output of 1 watt, so I don't think we're going to run into a lot of problems ( or even have the ability) running long range transmissions ( using the mast antenna,  Go to the wire antenna, and the ability to get into trouble is significantly increased ). So unless there are two of us within radio range of one another, I understand that there may not be a lot of people to talk to.  I'm still gathering parts, so will be a long time before getting into trouble transmitting is something I'll even be able to do, never mind worry about. First I have to get the thing working..  As far as a power source, it has to look and function as the original.
Mark D.WW2RDO


In a message dated 5/30/2020 8:09:42 AM Eastern Standard Time, tbryan at nova.org writes:


Hi Mark,

As far as batteries go, what do you intend to do with a Torn Fu d2?  Since it doesn't cover any ham usable frequencies, there's not much you can do with it other than demo the receiver.  You could run the transmitter into a dummy load and transmit a short distance for a demo.  This would keep you inside the law.  

So, for batteries I would suggest a bunch of 9V batteries to use in place of the 80V batteries and some 2V lead acid battery like a gel cel for the filaments.   You could also get a dc-dc converter for the 80V batteries.  These are available cheap on ebay.  

Something like this https://www.ebay.com/itm/DC-DC-Boost-Converter-8-32V-to-45-390V-Voltage-ZVS-Step-up-Module-Single/153950157415

If you get these to supply the high voltage you will need to put in a shielded box.  They put out tons of noise.   see http://k4che.com/BC474power/invnofilter.mp4 and http://k4che.com/BC474power/BC474%20Power.htm

Tom 

 
On 5/29/2020 11:05 PM, Captain D. wrote:
I do have a reprint of the operators manual for the Torn Fu.d2, in German of course, if anybody needs reference material.  What are you guys using for batteries?  Also, I was lucky enough to find an original power plug for the radio in decent enough condition ( I think) to use. Anybody find anybody to make repops?
Just in case anybody is tempted to use the cast resin version of the mast antenna base, don't.  The resin simply isn't strong enough, and has a tendency to snap after little field use.

Finally, it sounds like if we ever got together as a group within radio range of one another, it could be a very interesting  field exercise.
Mark D.WW2RDO
In a message dated 5/29/2020 9:11:11 PM Eastern Standard Time, RAFANTINI at salisbury.edu writes:

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