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2015 Ultraportable shootout?

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By emiliofm@... · #24839 ·

Re: Kchibo antenna experiments installment 2 (trying to analyze Ray's loop)

Ray can give details about his loop--inductance, min/max of his variable cap used to tune it, etc. I used a program by Reg Edwards to "reverse engineer" Ray's loop given the details Ray has

By Steve Ratzlaff · #24838 ·

Re: Kchibo antenna experiments installment 2

So far I have one more question. Since I listen to radio programing and even music on AM radio, with Litz wire for the turns on your one meter loops, is the selectivity so sharp the audio bandwidth

By Rik · #24837 ·

Re: Kchibo antenna experiments installment 2

I live in Tuscaloosa, AL. If your core is for AM there is a good chance that it is made with 73 mix material. I can't remember what the wire size was that I used, but it was maybe 24 gage. It doesn't

By Everett N4CY · #24836 ·

Re: Kchibo antenna experiments installment 2

Everett - You may as well mention where you are located. None of my home made loops use Litz wire [so far]. My three PK loops do tune sharper, with a definate peak. I'll have to dig out my

By Rik · #24835 ·

Re: Kchibo antenna experiments installment 2

Both loops work very well, with very sharp tuning and I used them as a standard for comparing the performance of some of the FSL's that I built. I still have them, no longer use them, I want to sell

By Everett N4CY · #24834 ·

Re: Kchibo antenna experiments installment 2

OK- I see your one meter loops in the files here. GORGOUS!!!!! Interesting you use both a single pick up turn and the 64:1 transformer for connecting to your R-75. -FARMERIK

By Rik · #24833 ·

Re: Kchibo antenna experiments installment 2

That sounds very interesting. What cap would tune your loop? Mine are tuned with 365-400 pF I think. Wouldn't it make a difference if the loop was tuned in the AM BCB by a cap much 'larger' or

By Rik · #24832 ·

CC Skywave-- TP-DX Seoul Music

Hello All, For those considering a purchase of a new C.Crane Skywave and wondering how the 1 kHz DSP audio sounds for transoceanic DX recordings, here is recording of 603-HLSA (from Namyang, South

By Gary DeBock · #24831 ·

Re: Kchibo antenna experiments installment 2

Ray, If you will look in the files section, you will see antennas and equipment, click on it and you will see two one meter loops that I built and a FSL project too. If you will just make the

By Everett N4CY · #24830 ·

Re: Kchibo antenna experiments installment 2

Thank you Everett, I am trying to duplicate reports of box loop tuning so sharp that it is possible to select which sideband to use. The idea is to use cheap hookup wire to get as far as possible

By Phillips · #24829 ·

Re: Dead DT-400W

Gary, Thanks for the 'reset' info on the DT-400W. I have two of them. One I keep stowed away - without batteries - in my radio "vault" (closet). The other one stays by my side of the bed, batteries

By Stephen H. Ponder <stephen_ponder@...> · #24828 ·

Re: Dead DT-400W

All, I'll answer my own question. To reset the DT-400W, I left the batteries out of it for 20 to 30 minutes. After this, I put in some fresh batteries and it sprang back to life. I'm glad to have my

By Gary Kinsman · #24827 ·

Dead DT-400W

Hello all, I decided it was time to charge the NiMH batteries in my DT-200VX and DT-400W today. When I pulled the DT-400W out of its case, the display was blank. I put in a set of freshly-charged

By Gary Kinsman · #24826 ·

Puyallup, WA Ultralight TP's for 3-16

Hello All, As Richard reported Asian signals fell off somewhat this morning from yesterday's level, with mostly the usual low band performers showing up. The NHK big guns on 594, 693 and 747,

By Gary DeBock · #24825 ·

Oklahoma TP DX 3/16/15

TP DX wasn't as good this morning as yesterday but a couple signals were heard. 594 JOAK - barely audible talking at 1121-1127 GMT. 747 JOIB - barely audible briefly at 1136. 774 JOUB - barely

By bbwrwy · #24824 ·

Re: Kchibo antenna experiments installment 2

Ray, A few years ago I did a lot of experimenting with pick up loops for both FSLs and air loops. The problem that I had was similar to yours. When I tried connecting the pick up loop to the 50 ohm

By Everett N4CY · #24823 ·

Re: Kchibo antenna experiments installment 2

Thank you for your feedback. The Kchibo does display the S/N. I have noted those figures but have been leaving them out of the postings for clarity's sake. I am planning a summary at the end and

By Phillips · #24822 ·

Re: Recording DX

Hi Jim, I just spent time waiting for some sockets to complete an audio attenuator so that I can record using mic or line in jacks to record. Finally all the parts arrived, I completed the

By Phillips · #24821 ·

Re: Kchibo antenna experiments installment 2

Hi Ray, At least the way I understand loops, you can't change the impedance ratio unless you change the turns ratio. But certainly by reducing the pickup loop coupling you're improving the

By Steve Ratzlaff · #24820 ·

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