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Re: Resonance and Training

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

By neil.findlay52 · #7539 ·

Re: Directional ferrite? - FARMERIK

--- 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

By jim_kr1s <jkearman@...> · #7538 ·

Re: Resonance

--- 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

By jim_kr1s <jkearman@...> · #7536 ·

Re: Resonance and Training

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

By Roy <roy.dyball@...> · #7535 ·

Re: Resonance and Training

Hi Roy Yep that will be the next project -- except that I will have to purchase another PL300 as my mother has my old one as she lives in a deep fringe area. Thanks for showing us how to implement

By neil.findlay52 · #7534 ·

Re: Directional ferrite? - FARMERIK

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 needed. Do a search on crystal or xtal radios. Those

By kevin asato <kc6pob@...> · #7533 ·

Re: Resonance

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 it. I first learnt about resonance 45 years ago during a

By Roy <roy.dyball@...> · #7531 ·

Re: Directional ferrite? - FARMERIK

What I am trying to design in my head would be to block AM radio stations from the sides, I guess that is what you mean by Null. But if it could narrow the direction signals are received from, it

By Rik · #7530 ·

Re: Grundig G6 - ultralight or not?

Hi Kevin, The FM on my R9012 is terrible (it is the newer version). It picks up the same station at multiple spots on the dial, and it can't pick up several stations that my DT-400W gets with no

By Gary Kinsman · #7529 ·

Re: Project using SI4735 DSP Radio Chip

Hi Neil Sounds like you are well on the way with your PL-380 I hope we are going to see some pictures when you have got it done. I checked out the project in the Elektor magazine and was able to

By Roy <roy.dyball@...> · #7527 ·

Re: Directional ferrite? - FARMERIK

There's a short discussion of that antenna in my 9th Edition ARRL Antenna Book in Chapter 14. It may also be in later editions, too, but this is the latest I own. 73, kevin kc6pob

By kevin asato <kc6pob@...> · #7526 ·

Re: Radio photos-FARMERIK

hoped you backed up those words with a bit of action! 73, kevin kc6pob

By kevin asato <kc6pob@...> · #7525 ·

Re: Resonance

HiRoy, Thanks for yourcomments, which are appreciated. I think everybodyis in agreement that the loopstick coil inductance providing maximum AMsensitivity in the PL-300WT/ G8 models is typically

By Gary DeBock · #7537 ·

Re: Radio photos-FARMERIK

THANKS! Actually that is a tiny fraction of them and my wife Nan thinks I have WAY too many radios. I tell her they are like flowers, you can never have enough! - FARMERIK

By Rik · #7524 ·

Re: Directional ferrite? - FARMERIK

Back in the 1980s, the late Doug DeMaw of ARRL Headquarters, just down the road from you in Newington, got interested in the 160-Meter (1800-2000 kHz) ham band. His house was on a small suburban lot,

By jim_kr1s <jkearman@...> · #7523 ·

Great TP-DX on the "Stealth" PL-380

Hello All, One of the fringe benefits of a successful loopstick projects is to enjoythe DX obtained with your new creation :-) Although the TP's are typicallyfairly anemic in January, for some

By Gary DeBock · #7532 ·

Re: Grundig G6 - ultralight or not?

Hi: Unfortunately, the G8 is not very sensitive at all on LW. I took it to Europe last summer, and even with megawatt LW stations nearby, reception was still only just OK. The LW sections of the

By dhsatyadhana <satya@...> · #7522 ·

Re: Radio photos-FARMERIK

You have more radios than Nan has pumpkin breads! Great collection. Thanks for the pix and info. 73, Jim, KR1S http://qrp.kearman.com/

By jim_kr1s <jkearman@...> · #7521 ·

Directional ferrite? - FARMERIK

I was noticing some of my radios are pretty directional, when using the ferrite rod antenna inside of them. I was wondering if a shield could be made which would block signals from the sides even

By Rik · #7520 ·

Radio photos-FARMERIK

Most of these are not ULR's, but some members may enjoy photos of a few radios in my collection. Start here and click 'next' until you run out of radio pictures. Be sure to scroll down and see the

By Rik · #7519 ·

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