开云体育

Cable protection or even burying in gnd via suitable conduit is good..stops the bloody foxes here in London..( fcukers are everywhere!) Saying on gnd or below because qro transmissions will ingress

Hi, You guys often use terms like FTxxx-yy or BNxxx-yy to refer to various ferrite products - like "use x turns on a FT240-31 for this application". By that, do you have any particular manufacturer /

Thank you for the clarification on TX-SDR isolation. It would have been nice if you has a hybrid splitter (for receive) in the design instead of using a T connector and a 3 .7 db pad on the receive

From my experience as a former cellphone base station engineer in Southern England, I found that the most common culprits in rural sites were small woodmice. They even managed to get inside the cabins

Maybe, but in woodland it's likely to get chewed by various animals, unless you run it in some hose pipe or similar protection. Even if it is a few feet up in the sky, squirrels will be tempted to

On the ground would be better..

Best person to ask is LZ1AQ. Great guy and always responds. I have about a 50 foot run and it works fine. I have no choke on it. Mike AB4KJ

A 30m (100ft) length of Cat 5 has typically 3 dB of attenuation at 30MHz, 2dB at 10MHz and <1dB at 1MHz. If your receiver noise floor rises by >6dB when the antenna is connected, you won't have a

13 January 2022 I bought an LZ1AQ active antenna amplifier to try. The performance of my Wellbrook wide aperture loop has been excellent since moving it further from the house, so I would like to try

Just some answers: 1.? >>The isolation between transmit and SDR receive is not good enough on this product.? It will work OK for QRP but not with a transmitter using more than 10 watts. 1. I think

The isolation between transmit and SDR receive is not good enough on this product.? It will work OK for QRP but not with a transmitter using more than 10 watts.

I have the DX Engineering switch that adds a antenna port for receiving. It works super but is a pricey bugger. I am using a simple 2 position coax switch to use 2 different radios. (Yaesu FTDX-3000 &

Or you could easy make one..relay..transistor, cap or 2, resistor or 2.. little metal box, 3 so239’s and 12v in.oh and a phono socket. Would need to go in non 12v powered rx line… Simon

MFJ has one. I have used it for 5 years and it is small and works well. You can see it on the MFJ web site. DX engineering used to source it too. stevebrodie@...> wrote:

I have the DX engineering loop (formally Pixel), which is an active loop similar to yours. I have mine located about 50 feet from my TX antennas. I run anywhere from 100w to 1kw. The DX loop has a PTT

Steve, M0OYR wrote on Jan 12 2022 “ I've been using a couple of Wellbrook 1530 active receiving loops for the past 20+ years for shortwave listening with FRG100 and AR3030 receivers. Finally got my

Generally speaking the loops are unlikely to be damaged. However you raise a good point about any receivers that may be connected to them whilst you are transmitting. Most receivers will withstand up

Hiya Hope this is suitable for this group. I've been using a couple of Wellbrook 1530 active receiving loops for the past 20+ years for shortwave listening with FRG100 and AR3030 receivers. Finally

If one is designing a loop amplifier from scratch or modifying a design, then test equipment (big name brand, low end, or homebrew) is desirable, but if duplicating a well known and highly regarded

Hi Bob, the diagram on that page only shows a SDR and Transceiver sharing a single antenna. It doesn't seem to separate 2 antennas one for tx and one for rx.