Messages

151

Equipment / Re: Looking for Linear Power Supply

« on: March 10, 2021, 2339 UTC »

here are the Specification :

Power Input       =  30-100 Watt SSB
Output Power    =  800 Watt
Voltage              =  17-20 Vdc
Transistor          =  8 units IRFP150N  ( Many in Ebay for $ 2 each )
Frequency         =  2 Band 3,5-14 Mhz,
                              3.8Mhz = 600 Watt , Peak
                              7 Mhz = 800 Watt.  Peak Power
                              11 Mhz = 500 Watt, Peak
                              14 Mhz = 300 Watt , Peak

Oh god no...

Do the innerds look like this?


Another piece of sound advice...don't buy semiconductors off ebay.  Many times the devices are restamped versions of smaller devices and they will fail prematurely...especially if the come from overseas.

+-RH

152

Equipment / Re: Looking for Linear Power Supply

« on: March 10, 2021, 2335 UTC »

I think we're more interested in the amplifier itself, i.e. why the strange voltage requirement.  Most stuff is going to expect either 12 or 24VDC for supply.  I've never seen anything RF related that required 18-20VDC.
+-RH

153

Equipment / Re: Looking for Linear Power Supply

« on: March 10, 2021, 1847 UTC »

Commonly available 24V smpsu's all over eBay.

If you think they're manufactured in any other place than CH, think again! They aren't made in the US..

Despite the bad rep it mainly down to ignorance as they are in the main absolutely fine.

Try and stick with a branded version like; JCPOWER or MEANWELL.

Just parrallel up what you need 3x500W or 2x750W or whatever.

24V will adj down to 18V.

Btw, you're looking for a power supply for your linear, not a linear power supply as that's an analogue, i.e. not switching lump with a massive transformer etc.

Str.

Agreed.  Why the strange voltage?  Most switchers are adjustable to some degree, but 18 is not a standard voltage.  A 24V supply should have enough range to drop to 21V or so, but that's about it.

+-RH

154

North American Shortwave Pirate / Re: Ball Smacker Radio 4030 AM 0158 UTC 6 Mar 2021

« on: March 06, 2021, 0218 UTC »

Got 'em here @ 0217z with a female vocal.  Listenable when above the noise.
0230 Sounds like Aerosmith 'Come Together'
Following a period of rapid deep fades, making a comeback with what shazam is calling Parliament's 'Together'.  About S6 now.
0254 Janet Jackson 'Together Again' S7, to deep fades under the noise.
0309 'We Belong Together' Randy Newman per shazam.

Thanks for the show!

+-RH

155

Software / Re: audio editing software

« on: March 04, 2021, 1931 UTC »

there was only one studio copy of Outhouse Radio ever made because i prefer live and on the fly.
closest thing you'll find is some of the of air recordings posted on the net by various dxers .
to me sitting back and broadcasting a prerecorded show was a bit on the boring side(relays are a different animal) . but that's me not you , so have fun no matter how you do it ...
 

It does turn into a one person drinking game pretty quickly.  Not much to do but listen to the generator hum and watch meters move and lights flash.

+-RH

156

Software / Re: DRM heavy childbirth 02 Mar 2021

« on: March 04, 2021, 1926 UTC »

Of course, signal measurements are rather meaningless without some SNR or noisefloor measuring.  S9 for me likely would not be enough due to my high suburban noise floor.  Likewise in a quiet rural setting s5 may be enough.

Not to be too snarky, but S9 is -73dbm.  Therefore S9+20 is -53dbm.

+-RH

157

Software / Re: DRM heavy childbirth 02 Mar 2021

« on: March 03, 2021, 0023 UTC »

This is why I am perfectly happy to watch DRM fall on its face.  Either open source both transmission and reception, or kill it.

+-RH

158

Huh? / Re: Maple Sugaring Question

« on: February 25, 2021, 1856 UTC »

A friend and I would swap beer for syrup when doing the Dayton hamfest every year.  I would bring up some of the local brew, and he would trade a few quarts of Wisconsin maple.  When they moved the Dayton fest to Greene county several years back, I passed a house on the side of the road one morning selling syrup.  I stopped and picked up a few quarts.  I was surprised, I had no idea such a thing was conducted even in Ohio.

+-RH

159

Huh? / Re: 1560AM going bye-bye in NYC? Here's why.

« on: February 19, 2021, 1858 UTC »

Prices in the city are insane.  See any of Louis Rossmann's videos for more on the subject.

+-RH

160

Huh? / Re: We may be looking at severe shortages of some new ham radio gear due to AKM fact

« on: February 19, 2021, 1856 UTC »

AKM makes a lot of ASIC's for audio applications.  I have digital Behringer gear with AKM IC's in it.  This will be widespread across the industry.

Fortunately, TI (Burr-Brown), Cirrus Logic, etc also make competing parts, but redesign doesn't happen overnight.

+-RH

161

General Radio Discussion / Re: Rush Limbaugh has passed, Michael Harrison on his impact on radio

« on: February 17, 2021, 2250 UTC »

Love him or hate him you would have to admit that he did more to revitalize AM radio than anyone or anything else.

+1

+-RH

162

Software / Re: Will Net Radio Data Base Reciva go bye-bye? Alternatives? And UPDATE!

« on: February 17, 2021, 1545 UTC »

I looked at getting a standalone digital tuner last year.  I was put off from not only the cost, but most of the stations I like to listen to only offer streaming through an app or through their website.  And sorry, but I don't want to tie up my phone or a web session to keep audio going.

+-RH

163

The RF Workbench / Re: Stretchyman 40 W TX Reliability Modifications

« on: February 14, 2021, 0705 UTC »

Boys,

Can we do with a little less hostility?  There is already enough negativity on the web.  If this must continue, please take it elsewhere.

Thanks,

+-RH

164

North American Shortwave Pirate / Re: Radio Free Whatever 4020 USB 2235 UTC 13 Feb 2021

« on: February 13, 2021, 2322 UTC »

Very good signal on the K3FEF Kiwi at 2322 with what sounds like The Smashing Pumpkins.  I'm starting to get hints of this on the local waterfall, but I have a local interfering signal at present.
Thanks for the shout!! Good to hear you again   Yes it's true, I haven't been listening that much anymore, and sorry about that.  I've been more focused in recent years towards transmitting and building gear, but I'm starting to listen more.  Especially since I now have a working SDR again.

Also hearing music by Django Django, Island, Bastile, and others.  Starting to see traces on the waterfall here, with threshold audio.
2353 DW back on the mic.  I am hearing RTTY under you during the break though
0015 Good signal locally now.
0026 radio edit of Romeo Void's "Never Say Never" How about Zolas "Energy Czar" one of my favorites right now

0033 Emi Jean 'Other Side' I smell a relay station request Cool tune
0037 Zolas 'Energy Czar' Thanks bud!
0047 DW live into Idontknowhow 'Leave Me Alone' AWESOME 
Gotta run, but thanks for the cool tunes and requests tonight.  Take care my friend!

Thanks for the show!

+-RH

165

Huh? / Re: 1560AM going bye-bye in NYC? Here's why.

« on: February 13, 2021, 0400 UTC »

In the words of Steve Miller... https://youtu.be/CkcrndYye60

+-RH