Messages

586

Equipment / Re: Photos of the mag loop project - need some wiring advice

« on: February 10, 2016, 1317 UTC »

Not sure what you have there?

Is it a 2 turn loop?

Is the cap 'Split Stator'? it needs to be!

Do you have a drawn diagram anywhere?

587

Equipment / Re: High SWR in a cushcraft A3S yagi

« on: January 17, 2016, 1019 UTC »

Could be ANYTHING!

I'd terminated the coax at the anternna end to rule out the feeder first.

it's fed directly so no fancy matching.

Str.

588

FM Free Radio / Re: Any stations in Los Angeles?

« on: January 15, 2016, 0603 UTC »

Why not start one!

 

589

Equipment / Re: What radio should a beginner get for shortwave listening (Under 90 USD)

« on: January 14, 2016, 0700 UTC »

Yes any of the Tecsun range and their clones, they all use the same chip, Si4734 et al from SiLABS.

The radio therefore is DSP and leagues ahead of anything previous especially at the price range.

That or an SDR kit if there's one at that price.

Good Luck!

Str

 

590

The RF Workbench / Re: Higher power design.

« on: January 13, 2016, 1716 UTC »

You can series the batteries so you get 24V or 48V (or whatever) and invert to a higher voltage from there.

Yes gennis are noisy and not advocating their use (altho' I would as I have a site miles from anywhere) and am just trying to cover as many bases as possible.

The (RF/PWM) design will (should) push close to a KW (@ 150V) and of course will need many volts hence my 120/150V supply.

However it will work at ANY voltage, half the volts = quarter of the power.

 

591

The RF Workbench / Re: Higher power design.

« on: January 13, 2016, 1313 UTC »

I'm trying to keep costs to a minimum. I wont be supplying any power, just 'recommendations'.

It will need 110-120V A.C. (or D.C.) and 24V (probably) as the drivers need 18V.

Also I'm not that interested in selling built units, one or two maybe to 'notables' but no more.

The kit will be fairly simple to put together.

 

592

The RF Workbench / Re: Higher power design.

« on: January 13, 2016, 1158 UTC »

If it's in a rack it's in the house and you may as well use SMPSU's

I'm looking at 'Portable' use, hence the 110V from a genni or inverted from 12/24/48V D.C.

The PSU can be left up to the user anyway, I'm just designing the amp and PWM!

 

593

MW Loggings / Re: MW antenna ideas

« on: January 06, 2016, 0723 UTC »

Why not just put up a balanced dipole, the simplest of antennas.

Your trying to use a CB antenna, why you're not listening to CB!

Just put up a 'Proper' antenna, you will save a lot of time!

 

594

Equipment / Re: "Legal power" in the world

« on: January 05, 2016, 2205 UTC »

Unsure why 'Legal' power is being even mentioned on here

Wrong site for that I reckon!!

 

595

MW Loggings / Re: MW antenna ideas

« on: January 05, 2016, 0718 UTC »

Stops the front end overloading!

596

North American Shortwave Pirate / Re: weird carrier, 6950am 0335utc Dec. 18, 2015

« on: December 18, 2015, 1232 UTC »

Hurrah, there's another on the air!

Please ONLY use the LTC1799 for experimenting, i.e. peaking the O/P and piddling about

I'm selling some DDS's now, ideal for the LuLu or anything else for that matter.

Please check the 'For Sale/Wanted' section.

64 programmable channels, Why bother with Xtals?

Str.

597

Equipment / Re: An Overview of the Underestimated Magnetic Loop HF Antenna

« on: December 18, 2015, 0752 UTC »

Yep, I got one of the 'Ukrainian' caps too (100pF).

around 20' and the cap will get me where I want to be.

Surprised your having a problem getting out on a vertical or dipole.

Are you using 'online' SDR's are just relying on reports?

Str.

598

For Sale / Wanted / Barter / Re: 4x16 Ch PIC controller for DDS. ANY FREQUENCY = NO MORE XTALS!

« on: December 17, 2015, 0707 UTC »

Yes!  Definitely!

 

What I mean to say is that I'm confused with your question.

It's a signal generator that generates RF at the frequencies quoted.

Yes it outputs RF, what else could it do......I'm still very confused by your question?

Am I missing something, perhaps?

Please let me know!

Str.

599

General Radio Discussion / Frequencies of use (outside of 43/48m)

« on: December 16, 2015, 1413 UTC »

I've programmed up some DDS boards with 16 U.S & 16 Euro well used frequencies and have 32 slots left.

I'd like to fill them with well used U.S & Euro frequencies, could be Ham, Pirate, I'm not too bothered but as I have no 'user interface' (yet) the frequencies cannot be changed (easily) so would like to put something 'useful' in there.

Ideas please.

 

600

MW Loggings / Re: MW antenna ideas

« on: December 15, 2015, 0728 UTC »

Best is a loop, many designs out there, here's one;

http://www.hard-core-dx.com/nordicdx/antenna/loop/hulaloop.html

Otherwise just use a 'Long Wire' antenna, bit noisy tho'.

Str.