开云体育

Thanks Andy!! You're right I forgot all about the voltage feed. Glad I asked. While I have your ear. I have an older wellbrook " - center" power supply and I have a newer + center power unit. Is it

Hello John, Under no circumstances use 300 Ohm twin lead. There are 3 issues to consider: A reverse polarity on the feeder would damage the head Amp. If you get it to work, there may be instability.

Hi. I have a wellbrook ala100. La (large aperture) loop antenna. I purchased this about 3 or 4 years ago and I'm finally getting around to really using it. My question is can I feed it with 300 ohm

Thank you Max! Split cores are a brilliant idea! Huelbe

G'day again, I would suggest that you construct a temporary transformer using a split ferrite clip on device. Used to clamp on cables for interference reduction. It is much easier to wind different

Thank you for the insights, Andy!

Hi Max. It'd be a single turn, 1 meter diameter or a bit more, untuned. The loop terminal would be connected to a step up xmfr.

Greetings from vk2tti, Is the loop to be * single or multi turn or * tuned with capacitor? with regards.

I don't have references handy. But I think the reason for the step-up transformer, is because the small loop has an exceedingly low radiation resistance, and one gets better power transfer with the

Hello, I'm planning to experiment with a small loop (circular shape, 1 meter dia) passively connected to the 50R feed line. It'd be used for reception in LF and MF bands. I was checking the web and

Active AM Antenna With Twin Coil Ferrite by C. Crane Co. http://www.ccrane.com/antennas/am-antennas/ JLKolb?s antenna links including the KRS AA-1 Active Antenna schematic, antenna preamplfiers,

If you have a link relevant to the group, please post it in the Links section. If you just put it in a message, it will get lost in the shuffle after a few days. The coverage of the list is pretty

I've built a stand alone LF and bcb loopstick antenna (basically a Palstar LA30 clone) using type 33 and 61 ferrite rods for LF and BCB. So far so good, it works great. To finish up the project I'd

Drop by our booth #488 Take a look at the Pixel RF-PRO-1B RECEIVE Magnetic Loop – watch the live demonstration. We will also will have information available on the new incarnation of the BEVERAGE

Thanks, Rick. This forum is very useful! 73 Alan DH2AS (G4HEQ)

The acetone in paint or primer evaporates very quickly and so has little chance to permeate the substrate. I did a search for ABS and Acetone and found some interesting info on using a heated acetone

Hi Frans, Rick and all who responded: This is very reassuring and I will probably use an exterior wall paint of matching color. That is what IZ0FYS has done in Italy. His QRZ.com page shows photos.

As a chemist I would agree, metal oxides etc. do not inherit ANY metal free electron behaviour and would therefore not have a negative effect. I would expect they mean 'Metallic' paint, that actually

I think when they said "metal" the meant the elemental form of the metal, not a compound like TiO. In any event, I would not worry about the effect of paint, because it will be negligible compared to