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Ok, but I think, the RSP1A you mentioned in your starting post also has 50 Ohm input impedance like the Airspy HF+ Discovery. So: comparing apples? ;-)

Hi Dirk, Unfortunately, my receiver is RSP1A and I cannot judge how commercial AirSpy Moebius antenna performs with Airspy HF+ Discovery that has a better parameters. However, I crossed article that

Hi Martin, Thanks for a prompt response. I have been using the commercial made by Aispy Moebius passive anteenna. As you know, this antenna gets supplied with RG402 1 meter coaxial cable limbs

I'm not a particular fan of anything that Noo Electric makes for a simple reason is that they have a two year warranty for their Ham It Up and NESDR Smart device which they seem to have problems with

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

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

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

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

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

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