361
HF Beacons / Re: 4 MHz Western USA Beacons
« on: November 22, 2018, 1524 UTC »
Chris, what time have you heard these? I've been out in Calif and heard them clearly but never from the Right Coast.
Shortwave Pirate Radio In North America And Around The World, And Other Signals That Go Bump In The Night
We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations.
Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.
QEX is a ham rag.... (Its been years since I've seen it). Hams have been using class e for a good while.
Water is a great and cheap way to sink heat.
Yup...ergo the neutralization process.
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362
HF Beacons / Re: 8 MHz Western USA Beacons
« on: September 04, 2018, 1937 UTC »
Likewise...appreciate the post
363
The RF Workbench / Re: Beacon Project "Common and Precious III" (OFF air, 26510 kHz, 8W)
« on: August 07, 2018, 1754 UTC »
Thanks for the update zazzle. I think your analysis is correct. I would certainly agree with not broadcasting the location. A mo e of lovation seems wise also. Thank you for maintaining this weekend . It's really only chance we in the US to Log a European beacon.
Also super interesting to read off your photojournalism documenting both your beacons construction and placement . Please keep up the good work
Also super interesting to read off your photojournalism documenting both your beacons construction and placement . Please keep up the good work
365
The RF Workbench / Re: Engineering Paper in 1997 devotes discussion on class E amp 13 mhZ
« on: June 29, 2018, 0042 UTC »Quote from: digitalmod link=topic=40022.msg148374#msg148374 date= was....Its1516834535
It would appear some one just is not reading the engineering papers. Class E RF amp was developed at 13 MHz for 200 watts, in 1997 ! Authors use IRF 440 in push pull.
QEX article states class E better above 3 MHz, D below. Also the QEX article states Class E FETS have produced 100 KW transmitters , obviously in tandem in 2001 !
So clearly today in 2018, to ask 200 watts at shortwave a piece of cake,
Ref:
http://www.its.caltech.edu/~mmic/reshpubindex/papers/RFdesign.pdf
QEX is a ham rag.... (Its been years since I've seen it). Hams have been using class e for a good while.
Water is a great and cheap way to sink heat.
366
The RF Workbench / Re: A newbie question about a transmitter
« on: June 29, 2018, 0025 UTC »
"While they're great little transmitters, the parts, especially the style of transformers he rewound for the mod trannies, are getting as hard to find as hen's teeth. As much as I'm a Grenade man and think the world of it's inventor, stick with something you can easily get parts for and build."
Can you point me to the rewind instructions for what I'm guessing it's the old radio shack transformer? I have one of those and while I'm away from the shack if really like to know how to rewind it.
Having said that Stretchy s toroidal design early makes nice audio too
Can you point me to the rewind instructions for what I'm guessing it's the old radio shack transformer? I have one of those and while I'm away from the shack if really like to know how to rewind it.
Having said that Stretchy s toroidal design early makes nice audio too
367
The RF Workbench / Re: Crystal question
« on: June 27, 2018, 1611 UTC »
Typical protection scheme of the day was a miniature bulb in series with the crystal.
368
The RF Workbench / Re: Beacon Project "Common and Precious" (OFF air, 10.237,5kHz, 5W)
« on: June 27, 2018, 1609 UTC »
I enjoyed list e ring to the 30m signal. Hope you get the time to get it running but I sure know how life gets in the way of hobbies.
369
The RF Workbench / Re: Q about strange tuning on a valve TX
« on: June 27, 2018, 1601 UTC »I seem to remember an old ARRL handbook saying that when max power and plate current dip didn’t match, it might be an indicator of self oscillations/spurious emissions from the PA.
Yup...ergo the neutralization process.
370
The RF Workbench / Re: Q about strange tuning on a valve TX
« on: June 27, 2018, 1517 UTC »
Sounds like the final amp needs to be neutralized. Check arrl publications.
371
For Sale / Wanted / Barter / Re: LuLu Style Tx's 10W carrier, 40W Peak, with Modulator, Mod Tranny + 6925 XTAL
« on: June 27, 2018, 1504 UTC »
These Re fine transmitters and Stretchy is the man!!
372
HF Beacons / Re: The 'Y' beacon in the Mojave Desert is now on 5644.0 kHz
« on: June 27, 2018, 0221 UTC »
Been trying but nil.
373
HF Beacons / Re: Mojave beacons from central Cal
« on: June 27, 2018, 0217 UTC »
Windy is a little bit more QSB affected tonght but good copy on peaks. 104F out this evening.
Hrd several below in the 4096 region. Hard to ID with just a portable but Im pretty sure Haystack is the strongest.
QTH is near Lompoc
Hrd several below in the 4096 region. Hard to ID with just a portable but Im pretty sure Haystack is the strongest.
QTH is near Lompoc
374
HF Beacons / Re: Mojave beacons from central Cal
« on: June 26, 2018, 0210 UTC »
1900 PST.windy is easy copy to central coast. 103 F. Amazing copy to a portable with telescopic whip.
375
HF Beacons / Re: Mojave beacons from central Cal
« on: June 26, 2018, 0032 UTC »
105F @ windy at 1730 pdt. Windy coming up out of the noise.
