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--- In ultralightdx@..., "sdwillingham" wrote: > > For the techies in the group who are interested, I think this cananswer > most of your questions: US Patent 7561865 > . Thanks, Scott! I see in

layman's explanation (preliminary).... http://home.comcast.net/~phils_radio_designs/index2.htm regards, phil :)

Hi Scott Thank you also for the link to the patent. I realise you must be a busy man and the answers are all contained in the patent. It will take me a time to read and work through it. A lot of the

Hi Gary Thank you Gary and John for the offer of the Slider. I think I have a better idea. As I already have a 7.5" Amidon rod and have wound and tested the coil in my PL-380 and G8 it would make

--- In ultralightdx@..., "jim_kr1s" quotes me: > "First, the AM front-end of the Si4734 is a tuned-tank circuit with a > fairly conventional LNA and quadrature mixer as shown in the block >

Before mailing sliders off to the antipodes, I thought some experimenters might want to re-read Scott Willingham's (of Silicon Labs) comments on how the Tecsun DSP radios work. I've highlighted the

Hi Michael, I have a Eton E-100 and Tecsun PL-380. I will try to do some comparisons soon. John

Well, it looks like I jinxed myself! I tuned to 1540 last nite and KGBC was back on, but at reduced power. At least I can pick out stations on 1530 and 1550! The AM band has been pretty active and

Friends, I think that Gary has hit on a wonderful idea..... Gary, as I understand it, Roy's set up is almost an exact match for the380, as well, with the 310 being a bit of a strange duck, having

Hi Scott, Thanks for the link to the US Patent reference, and I'll certainly read itover. If I was a businessman I'd certainly be very thankful for this"debate"-- demand for the 7.5" loopstick

You know I was wondering about that. I would think a highly directional antenna in an entertainment radio would be undesirable. You could miss even a local station if the radio was turned in the wrong

--- In ultralightdx@..., "farmerik" > It just got me wondering if I could block signals from more of the sides, and make any portable much more directional on the internal ferrite rod. Thanks -

--- In ultralightdx@..., "Roy" wrote: > > > Hi Jim > > Thank you for the links to the Rider article, I have just had a skim > through but can see it is well written and I will enjoy digesting

Just to throw in my hat, I too appreciate the contributions of everyone concerned, whether they are experimental or discussions of proven radio theory. Each has their own merit. Everything that has

I had a wave trap many years ago, and it was great at blocking adjacent frequencies. What I wanted to do is block stations on the same frequency, but in slightly different directions. In other words

Roy Spot on 20th January 1969 in Hobart - started with 47 others 4 groups of 12 Very few of us still work for Telstra -- I am now with Optus after 30 years exchange install and then design doing

--- In ultralightdx@..., kevin asato wrote: > > That would be your null. > > If there are particular stations/frequencies you want to remove from your reception, maybe a wave trap will be what is

--- In ultralightdx@..., D1028Gary@... wrote: > > Hello Jim, > > Thanks for your amusing comments. Since you have already apologized once > for doubting the 554 uh inductance value in the PL-380

Neil Spot on. I was a T.I.T. with the PMG. Did my first year at Strathfield (NSW) in 1966. That first year we were hammered with AC theory. I really enjoyed the practical especially building the