The PINNACLE of Home Brew Amps - Or Not...

camshaft · 23rd March 2008, 05:31 AM

Sorry, if this has been posted somewhere before, but I just had to share it. (And yeah I know technically it would belong in the tube section...)

http://www.g8wrb.org/useful-stuff/eb...-amplifier.pdf

Enjoy,
Austin

TheMG · 23rd March 2008, 06:35 AM

Wow, that's crazy.

djk · 23rd March 2008, 08:05 AM

It's RF, not audio.

tryonziess · 23rd March 2008, 09:33 AM

From the looks of this project everything in it was salvaged from junk equipment. It is the paramount diy on a budget design.
Other than a missing rectifier what makes you think it never worked? If this unit was constructed by a young teenager I would say they did quite a good job for a first time project. At least they gave it a go and did not quit.
If you look at some of NP's very early work you would never believe the same person brought us the fabulous SS amps we see today.
It is a nice conversation piece. I like it. Tad

myhrrhleine · 23rd March 2008, 05:45 PM

Anyone aware of Bob Carver's coffee-can amp?
Allowed him to start in the business.

Brett · 23rd March 2008, 05:51 PM

Meh. No clipleads in sight. Very amateur 'rat' amp.
You should see some of my proto's. I do have a preference for MDF as chassis though.

nitrate · 24th March 2008, 01:33 PM

Looks fine to me

EWorkshop1708 · 25th March 2008, 12:49 AM

Not that bad.

Could be worse............they could have made a huge case, made the amp look big and powerful, then used an LM386 inside.

whoandcar · 25th March 2008, 02:02 AM

Man, it looks like an ham radio transmitter: 80, 40, 20, 15, 10 meters
Construction techniques styled back to 1950...
These were standard frequencies those days (I mean wave lenght)

BlackUnikorn · 25th March 2008, 02:18 AM

it is a ham radio amplifier. Those are ham hf radio bands, 10 meters (28-30MHz), 15 meters (~21MHz), 20 meters (14MHZ), down to 160 meters wavelength (1.8MHz I think), that's a huge antenna!!! The FCC is currently trying to "steal" the airwaves from the hams to make room for more telecom companies $$$. What a shame. Isn't it a man's natural right to use the airwaves? I mean in a couple of decades we'll be paying to breathe air. Anyway, this amp reminds me of a friends story about a homebrew kilowatt cb radio amplifier, it would give the guy the runs every time he turned it on. loll

23rd March 2008, 05:31 AM	#1
camshaft diyAudio Member Join Date: Dec 2006	The PINNACLE of Home Brew Amps - Or Not... Sorry, if this has been posted somewhere before, but I just had to share it. (And yeah I know technically it would belong in the tube section...) http://www.g8wrb.org/useful-stuff/eb...-amplifier.pdf Enjoy, Austin

23rd March 2008, 08:05 AM	#3
djk diyAudio Member Join Date: Feb 2001 Location: USA	It's RF, not audio. __________________ Candidates for the Darwin Award should not read this author.

23rd March 2008, 05:45 PM	#5
myhrrhleine diyAudio Member Join Date: Jan 2006 Location: Avalon Island	Anyone aware of Bob Carver's coffee-can amp? Allowed him to start in the business. __________________ Just because you can't hear it doesn't mean no one can.

24th March 2008, 01:33 PM	#7
nitrate diyAudio Member Join Date: Jun 2005 Location: England, Lancashire	Looks fine to me __________________ The perfect amplifier is a piece of wire with gain....

25th March 2008, 02:18 AM	#10
BlackUnikorn diyAudio Member Join Date: Nov 2003 Location: NJ	it is a ham radio amplifier. Those are ham hf radio bands, 10 meters (28-30MHz), 15 meters (~21MHz), 20 meters (14MHZ), down to 160 meters wavelength (1.8MHz I think), that's a huge antenna!!! The FCC is currently trying to "steal" the airwaves from the hams to make room for more telecom companies $$$. What a shame. Isn't it a man's natural right to use the airwaves? I mean in a couple of decades we'll be paying to breathe air. Anyway, this amp reminds me of a friends story about a homebrew kilowatt cb radio amplifier, it would give the guy the runs every time he turned it on. loll __________________ My tube stuff webpage: http://www.vacuumtubecentral.com


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23rd March 2008, 06:35 AM	#2
TheMG diyAudio Member Join Date: Jan 2008	Wow, that's crazy.

23rd March 2008, 09:33 AM	#4
tryonziess diyAudio Member Join Date: Apr 2007	From the looks of this project everything in it was salvaged from junk equipment. It is the paramount diy on a budget design. Other than a missing rectifier what makes you think it never worked? If this unit was constructed by a young teenager I would say they did quite a good job for a first time project. At least they gave it a go and did not quit. If you look at some of NP's very early work you would never believe the same person brought us the fabulous SS amps we see today. It is a nice conversation piece. I like it. Tad

23rd March 2008, 05:51 PM	#6
Brett diyAudio Member Join Date: Jan 2002	Meh. No clipleads in sight. Very amateur 'rat' amp. You should see some of my proto's. I do have a preference for MDF as chassis though.

25th March 2008, 12:49 AM	#8
EWorkshop1708 diyAudio Member Join Date: Nov 2004 Location: Florida	Not that bad. Could be worse............they could have made a huge case, made the amp look big and powerful, then used an LM386 inside.

25th March 2008, 02:02 AM	#9
whoandcar diyAudio Member Join Date: Sep 2004 Location: mendoza	Man, it looks like an ham radio transmitter: 80, 40, 20, 15, 10 meters Construction techniques styled back to 1950... These were standard frequencies those days (I mean wave lenght)

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