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Hi Gabriele, The given from your email? data are: 1. Moebius antenna with loop diameter of 50 cm, using PEX tubing of 20 mm in diameter, with 1 mm center conductor and air dielectric for a? design

Let me see if I can find it. Chris When the going gets weird, the weird turn pro - Hunter S. Thompson

I have built a 50cm diameter moebius antenna with outer side made by multilayer PeAlPe 20mm diameter and the inner with 1mm diameter wire. The idea was to increase the self resonance frequency

As you are probably aware, I'm not a great fan of the Youloop, but as an experiment you could try a single unscreened loop of wire, with the same circumference as the Youloop, but connected between

With Youloop, without any LNA and with Airspy HF+ Discovery the reception is very good from VLF up to the lower VHF range. But I never tried a 4:1 or 8:1 balun instead of the Youloop's built in balun.

Sent: Friday, September 23, 2022 1:17 PM To: [email protected] Subject: AirSpy YouLoop-2t with Nooelec Lana HF I am interested to hear out technical specialists about using AirSpy

I too would like the schematic. Fred - N4CLA wrote:

Attention: Chris Trask, N7ZWY / WDX3HLB Hello, I am interested in preamps with saturable-reactor (transducer). In his article "The Forgotten Use of Saturable-Core Inductors (Transducers)", a practical

As probably people? think about this issue. Aluminum tape is available from the heatpump/air conditioning industry. Likewise "airframe tape" this is high? grade foil tape. And then there is

Sorry, I misunderstood and deleted my iladvised post.

With respect to the comments on the above issue. I have to look at the bigger picture.? The basic loop design was changed in April 2014 to isolate the electronics from the mechanical stress caused by

Hi Hank, Could you please send us the exact type of conformal coating which you think is good? (supplier, part number) Many thanks in advance. Kind regards Matthias DD1US www.dd1us.de --------

That sure brings back memories of working at TI and being responsible for environmental testing of a few systems. Stick it in ’the oven’, freeze it, better work … or you-know-who gets a call. So

When I worked in the defense industry, all of the equipment we designed was built to handle -40C to +90C. Conformal coating was done on every board that went into the devices. Even though our standard

Not by so much, perhaps 5%, from memory Owen Duffy has some calculations somewhere. Inductance is slightly higher too. Aluminium ducting tape is a definite NO from me. Coper flashing is another

I've noticed a bit of a problem with the Wellbrook amplifier potting, which may have been resolved on later models. Having opened up one or two faulty Wellbrook amplifiers that have been donated to me

Water pipe is very impure copper..it does not need to be 99% or even near, just a copper colour will do to sell it.. Copper is copper..it costs x? per ton.. so if it’s cheap there is a reason. Air

When I worked in the aerospace industry and had to pot electronics in epoxy (for high g loading) we would first spray the PCB with a thin coat of resilient conformal coating then pot it in high temp

Ya - those loop calcs are, inaccurate when loop circumference is like 1/4 wave. A comparison between loop calc and real life:

How much worse is water pipe? It’s cheap because it’s used in large quantities. In fact, 15 mm is cheaper than smaller water pipe because 15 mm is more commonly used. 2” diameter helix is going