721
The RF Workbench / Re: Amperage of Fuse in Streachy Lunch Box
« on: January 30, 2018, 1725 UTC »
Is the rating not printed or stamped on one of the end caps? Every fuse I've ever seen is.
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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 permissable in your locale.
Yup, and in many cases simulation won't help either. When venturing into largely uncharted territory, it's just the cost of doing business.
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722
The RF Workbench / Re: Power Supply for TX
« on: January 30, 2018, 0102 UTC »
I have good luck with Mean Well (they meant well...) supplies. You can get them off the shelf anywhere. If you want something built a little better, TDK Lambda makes good stuff too with a little better ripple performance.
I don't know why anyone would take a chance on a no-name chinesium wonder.
+-RH
I don't know why anyone would take a chance on a no-name chinesium wonder.
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723
General Radio Discussion / Two Colorado pirates off after FCC raids last week.
« on: January 29, 2018, 0942 UTC »
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
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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
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724
For Sale / Wanted / Barter / Re: 'It's like Frankenstein's lab': Massive 78-year-old transmitter for sale
« on: January 29, 2018, 0349 UTC »
Typically with anything that old, all PCB containing components would have to be removed and disposed of, a very costly proposition. Here in the US, the equipment is not supposed to be moved until this has been completed. I have heard stories of equipment being sold to folks overseas, and as far as the gubermint was concerned, as long as it was leaving, no problem 
I am no expert on Canadian hazardous waste rules, but I imagine they are more stringent than our rules here, and as such, good luck getting that old girl anywhere.
+-RH
I am no expert on Canadian hazardous waste rules, but I imagine they are more stringent than our rules here, and as such, good luck getting that old girl anywhere.
+-RH
725
Equipment / Re: The best undercover fm antenna on the market
« on: January 27, 2018, 2342 UTC »
Good, I know who to contact once I get the hops on the fence growing! Booze and pirate radio, what could go wrong? 
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726
Equipment / Re: The best undercover fm antenna on the market
« on: January 27, 2018, 2219 UTC »
As it states, this is dependent on antenna design. ERI Rototiller type antennas are true circularly polarized antennas, same with cavity backed crossed dipole antennas. They provide true pattern circularity. Many of the early designs were mixed polarization, as such pattern circularity was not very uniform. To be fair, a tower will ofter disturb the pattern uniformity by reflecting one polarization and not the other.
At the end of the day, the effect is the same.
+-RH
At the end of the day, the effect is the same.
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727
Equipment / Re: The best undercover fm antenna on the market
« on: January 27, 2018, 2011 UTC »
My first real FM antenna was a jpole. I always had trouble with the match. It turns out, how most people mount it was a part of the antenna that was not at electrical zero, and connecting that to more metal would deteriorate the match. I later built a two bay vertical colinear anntenna out of aluminum wire, wood and plexiglass and that worked pretty well.
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728
General Radio Discussion / Re: A 'NEW' Bro. Stair ???
« on: January 27, 2018, 0643 UTC »
I was listening to AWWW tonight and he had mentioned that Stair was out of jail and back in the commune recovering.
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729
Equipment / Re: The best undercover fm antenna on the market
« on: January 26, 2018, 2205 UTC »
I could see a problem with an inverted V on 3M as like on HF a good chunk of your hard earned transmitter power is going straight up, or nearly so. Unless you have a flying audience, perhaps not the best choice.
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730
For Sale / Wanted / Barter / Re: 'It's like Frankenstein's lab': Massive 78-year-old transmitter for sale
« on: January 26, 2018, 1906 UTC »
I was thinking the exact same thing AC. The only problem is getting a box that old loaded with PCB's back to this side of the border!
...That and a new steel building to house the thing. Come on, generators are cheap
+-RH
...That and a new steel building to house the thing. Come on, generators are cheap
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731
The RF Workbench / Re: Engineering Paper in 1997 devotes discussion on class E amp 13 mhZ
« on: January 26, 2018, 0341 UTC »Red hat.. yes. serious money in a fool's hands where the prototype keeps blowing up.
Yup, and in many cases simulation won't help either. When venturing into largely uncharted territory, it's just the cost of doing business.
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732
The RF Workbench / Re: does anyone on here know if an IRF610 is a replacement for a IRF510
« on: January 26, 2018, 0048 UTC »
I once heard (therefore it must be true 
) That the IRF510's were out of tolerance IRF511's from the same wafer. Rather than throw them away, they just packaged them and reduced the specs a bit.
+-RH
) That the IRF510's were out of tolerance IRF511's from the same wafer. Rather than throw them away, they just packaged them and reduced the specs a bit.+-RH
733
The RF Workbench / Re: Engineering Paper in 1997 devotes discussion on class E amp 13 mhZ
« on: January 25, 2018, 2245 UTC »
The Cree version, C2M0080120D is around $16, 2 should handle full boar 1.2KW + Mod with adequate heatsink, 4 should handle around 2.5K. The 1700V devices on paper show promise to just north of 5KW for a quad, but by then your talking serious money @ $90 each.
The smaller brother to the '008 is the C2M016120D. I think these are OK to 500W, but I blew two of them up testing with mod @ 1KW for reasons unknown. Maybe I wasn't driving the gates hard enough, or the output transformer was saturating.
+-RH
The smaller brother to the '008 is the C2M016120D. I think these are OK to 500W, but I blew two of them up testing with mod @ 1KW for reasons unknown. Maybe I wasn't driving the gates hard enough, or the output transformer was saturating.
+-RH
734
Equipment / Re: The best undercover fm antenna on the market
« on: January 25, 2018, 2237 UTC »
3-4 miles was typical, although as you got out of town the signal would recover for a while and finally fade out as you ran out of fresnel clearance. In places of heavy multipath, the CP wavefront would reflect off nearby objects and produce a degree of null fill. It was effective enough for me to build a two bay antenna and run for several years until the FM's closed. I never again considered vertical only transmit antennas unless for emergency or testing applications.
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735
Equipment / Re: The best undercover fm antenna on the market
« on: January 25, 2018, 2121 UTC »
True. 'back in the day' I had close to 1 KW of ERP, but at 50' it didn't travel that far. I have on occasion heard it up to 60 miles away when up on a ridge when local enhancement was active, but you had to know what you were listening for to hear it.
Early on, I helped build a LP100 class station with a vertical antenna. In the fringe areas there was a lot of picket fencing (multipath). When we switched to a CP antenna, most of that went away.
I also noted from my own experience that with CP I had a lot fewer holes in my coverage area.
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Early on, I helped build a LP100 class station with a vertical antenna. In the fringe areas there was a lot of picket fencing (multipath). When we switched to a CP antenna, most of that went away.
I also noted from my own experience that with CP I had a lot fewer holes in my coverage area.
+-RH
