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Topics - redhat

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31
Pirate Radio History / NPR audio article on WFAT from 1978
« on: December 21, 2018, 0613 UTC »
Not sure where came from orignally, but I was cleaning out the data closet and found this.  When radio was....

https://drive.google.com/open?id=1jqtfkGmKks8l8GC6ZX_KPCdaW8YRWYWX

+-RH

32
General Radio Discussion / 4085 KHz, good choice or not?
« on: December 16, 2018, 2231 UTC »
I'm curious for feedback from listeners last night as to the suitability of 4085 as a transmission frequency.  One of the problems that plagues 43 meters is a combination of peskies and wideband data modes, both seem to be absent on 73 meters.  The down side to this frequency range is that it resides in maritime frequency allocations, and there does seem to be some data activity, albeit bursty.

With the downturn in propagation (SSN last night was ZERO) and the tendency for 43 meters to go long very early, I see few other choices but to head for longer wavelengths.  Halloween this year made this problem crystal clear for me, and until propagation returns to peak level or the noise becomes excessive on lower frequencies to allow enjoyment of a program, I see little reason to return to 43.

Any thoughts, or perhaps other ranges we should explore?  I would prefer not going much lower, as antenna considerations become a problem.

+-RH

33
I found this  tonight (this morning) while looking for something else.  Looks neat, lots of practical info.  Unfortunately, no direct info or plans for the tubes themselves, just the fixtures and equipment required.

http://www.tubecrafter.com/index.html

+-RH

34
As usual conditions were challenging (read: crappy) but thank you to all the folks that took in the show on Halloween and on the following Friday. QSL's/eQSL's will be ramping up in the following weeks and I hope to have new shows on the horizon as well.



Thanks all,

+-Redhat, X-FM Shortwave

35
QSLs Received / Radio Ga-Ga QSL
« on: October 13, 2018, 2135 UTC »
Got this in the e-post this morning.



Thanks!

+-RH

36
Submitted for your consideration....

+-RH

37
https://www.radiomagonline.com/industry/gatesair-to-stop-selling-new-am-transmitters

Quote
Company says the move is a "responsible step" and will now "focus on supporting existing customers’ transmitters with our available components"

    Paul J. McLane
    Mar 15, 2018

MASON, Ohio — GatesAir is suspending the sale of new AM transmitters.

Chief Product Officer Rich Redmond said: “Recent changes in the long-term availability of critical components from our suppliers, including several last-time buy notices, have caused us to take proactive steps to ensure we can meet our continued support obligation of our AM products,” he said.

“To safeguard our ability to offer an ample supply of spare components — and to secure the ongoing field support of our AM transmitters — GatesAir has taken the responsible step of suspending new AM transmitter sales, and will instead focus on supporting existing customers’ transmitters with our available components.”

He said warranty, field service, phone support, spare parts and repairs continue as normal for GatesAir AM products.

Flexiva AX, DX and 3DX transmitters all had a number of obsolete components that influenced the decision.

“GatesAir is currently in the advanced technology assessment phase for the development of an updated line of AM transmitters,” Redmond said.

The news has no impact on the FM line, anchored by its Flexiva FAX or FLX transmitter. For DAB Radio, GatesAir recently launched the Maxiva VAXTE platform and will be showing new power levels at the NAB Show, Redmond said.
By
Paul J. McLane

I guess Nautel is eating their lunch?

+-RH

38
I'm getting tired of Firefox, it seems like they've lost their way.

Text only would be nice for some things, like news sites.

Thoughts?

+-RH

39
I've suspected this was possible before, but tried it today and verified my suspicions.  Buy a TPA3116 amp board off ebay or amazon (about $12).  Feed 24-28VDC into the amp board, apply audio, and take the L+ terminal to your RF amplifier.

Why it works;
These chips are PWM audio amplifiers.  In order to produce symmetrical output, at rest the output of the amplifier is one half the supply voltage, minus a diode drop or two.  Thus, with 25V of input, the output pins rest at around 12V.  This is perfect for a small grenade/lulu/etc type AM transmitter.  All the benefits of PWM with none of the hassle.

As a side benefit, the chip has built in thermal and over current protection.

Better yet, get this guy, as it has built in 12 to 24V boost  so no need for 24V power source.
https://www.amazon.com/dp/B0767JLR84/ref=twister_B079QY7999?_encoding=UTF8&psc=1

+-RH

40
General Radio Discussion / Don Baldwin aka Rockpicker has passed away
« on: February 08, 2018, 0106 UTC »
I got an email back from his wife Margie this afternoon after sending out QSL's and she told me he passed last November.  I offer my sincerest condolences and suggest we all raise a glass to a fellow friend and DX'er.

He was one of us, and Margie told me to tell everyone here he loved us all.

https://www.afterlife.co/us/obituary-coffee-creek-don-f-baldwin-6435055

+-RH

41
From NOW...

Two long-time Colorado pirates go dark after last week’s visits by the FCC.

“Way High Radio” in Ward, Colorado reportedly has been in operation for much of the time since 1997 – but this was its first in-person visit by Uncle Sam. The Boulder Daily Camera. has the story, and it’s telling that the paper identifies the Ward station as “KWHR/90.5” – and one in Nederland as “KNED/93.1” - with legal-looking calls. Way High Radio posted on Facebook that “We are under attack from the FCC.” The visits fit in with the crusades of FCC Commissioners Mike O’Rielly and Chairman Ajit Pai. The local paper says that in Ward, Colorado, the feds could’ve found Way High Radio from its website – which says it’s next to the town hall. A personality from KNED said “We were kind of expecting” the FCC to drop by, “because of the station in Longmont, which really kind of pushed the envelope” for the Commission. The January 4 NOW had the story about Commissioner O’Rielly roasting the online Longmont Observer publication, because it had supposedly “romanticized” pirate radio in an item about Green Light Radio. It styles itself as “KGLR.” Both Way High and KNED continue their online streams.

https://mailchi.mp/tomtaylornow/tom-taylor-now-123321?e=abf99c396a

+-RH

42
From an email newsletter;

Tom Taylor NOW

Quote
The FCC is still open for business
Open For Business Most of the “non-essential” parts of the federal government closed on Friday – but not the FCC.

Chairman Ajit Pai saw the potential shutdown coming and stashed away enough funds to keep his agency going for a whole week – at what sounds like full-tilt. Note that this isn’t the shutdown-contingency plan Pai shared last month, when he said they’d keep about 225 of the 1,492 staffers on the job. That’s still in abeyance and could be triggered if needed. Here’s what the FCC said Friday – “In the event of a partial government shutdown, because of available funding, the FCC plans to remain open and pay staff at least through the close of business on Friday, January 26.” There’s important work going on – especially next week, when Pai hopes to convene the scheduled January 30 meeting and start rolling back his Democratic predecessor’s Net Neutrality policy. Pai’s personally taking a lot of heat on that, from Congress and third-party protesters. He’d probably like to have that 3-to-2 party line vote taken on January 30 as scheduled, and get on with it. D.C.-based attorney David Oxenford says in a weekend post that “we have even heard that the FCC auctions may be funded differently from the rest of the agency, and may continue even if there is no resolution.” The Copyright Office is closed, though the Patent and Trademark Office says it’s good “for a few weeks.”

I guess tom foolery will have to wait until next weekend ;)

+-RH

43
The RF Workbench / GPS discipline a cheap Ebay DDS module
« on: September 23, 2017, 2107 UTC »
A neat idea I came across today.  Instead of disciplining the reference oscillator, just measure its drift and update the DDS frequency!  Generate any frequency from 10Hz-30MHz with precision of better than 1 Hz.

Uses (mostly) off the shelf hardware.  You do have to build a divide by 32 prescaler for the DDS clock.

PDF http://www.knology.net/~gmarcus/VFO/GPS_Sig_Gen_v1_1.pdf

Arduino code http://www.knology.net/~gmarcus/VFO/AD9850_gps_vfo_v1.ino

+-RH

44
On with 'Love Me Do' About S7 here.
hiphop piece, then 'Flashback AM' ID @ 2115z
2116z Twenty One Pilots 'Heathens' clip, then Flashback AM ID down to about S6 now.

+-RH

45
General Radio Discussion / X-FM is headed for dry dock
« on: September 12, 2017, 1210 UTC »
I've been spending a lot of time lately trying to get transmission gear to behave and at the same time trying to pay the bills.  As of late, things have been piling up faster around here than I care to admit, and progress on the transmitters and associated gear has been going far slower than I anticipated.  The looming date of Halloween, this list of things that must be finished beforehand brought me to a conclusion late last night that I didn't really want to admit, but now have to.  For the last six years or so, this has been my hobby, and one of my few remaining ways to blow off steam and have a good time.  Lately its become too much of a burden on my time and finances.  I'll never say I'm not coming back, but without a functioning transmitter and the spare funds to go out and play, it looks like its going to be a while.  Rather than half-ass something together, when we relaunch, it will be bigger and better than ever, even if only noticeable from this side of the mic.

I thank you all for your support over the years, your reports, and sticking through the rough conditions.  Needless to say unless something happens over the next month or so, Halloween is probably off the table, as are any show for the following year.

I'll still be hanging around the boards and helping folks where I can.

Thanks all,

+Redhat, X-FM Shortwave

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