John Iverson
DDPres
Let us try a different subject on R.A.H.E. Does anyone know where
John Iverson is? Is he alive or dead. I know there are people out
there who have this information. Please share it with us. This
industry is full of interesting characters and personalities. For
those of you unfamiliar with John Iverson, is was the man responsible
for the Electron Kinetics product line that produce the Eagle line of
amplifiers. John Iverson is perhaps more interesting than his
products were.
Responses encouraged.
Steve Zipser (Sunshine Stereo)
DDPres wrote:
You, of course, left out his two most important - and earliest
products! One was the Elctro-Research A-75, which (along with Nelson
Pass's first Threshold amp) was the earliest solid state Class "A"
amplifier on the market. The second product was an ion speaker - I
never heard it, but people who did thought it was spectacular. How it
worked is totally beyond me, but I think he did it while doing
particle weapons research for Uncle Sam.
Zip
James W. Durkin
> Let us try a different subject on R.A.H.E. Does anyone know where
> John Iverson is?
For those curious about Mr. Iverson (the person, his products, and his
disappearance), a fair amount of information is contained in the RAHE
"Threads Of Note" Digest -- Issue #4.
Point your handy, dandy web browser to
ftp://ftp.graphics.cornell.edu/pub/rahe/digest/ton/
The files are compressed with Gnu's GZIP utility, and should be easily
unpacked with most workstation or personal computer compression
software.
-.- James Durkin (r.a.h-e moderating team)
Stewart Pinkerton
"Steve Zipser (Sunshine Stereo)" <z...@ix6.ix.netcom.com> writes:
>DDPres wrote:
>> Let us try a different subject on R.A.H.E. Does anyone know where
Ionic speakers have been around for a long time, one of the best
tweeters in history was the sadly discontinued IonoFane, but they tend
to involve large amounts of highly toxic ozone and ludicrously
dangerous HT voltages, so they have never been as popular as their
sound quality deserved.
--
Stewart Pinkerton | If you can't measure what you're making,
A S P Consulting | how do you know when you've got it made?
(44) 1509 880112 |
Tom Pohorsky
In article <4o4ilv$a...@eyrie.graphics.cornell.edu>, Steve Zipser
(Sunshine Stereo) <z...@ix6.ix.netcom.com> wrote:
>DDPres wrote:
>
>> Let us try a different subject on R.A.H.E. Does anyone know where
>> John Iverson is?
>
>You, of course, left out his two most important - and earliest
>products! One was the Elctro-Research A-75, which (along with Nelson
>Pass's first Threshold amp) was the earliest solid state Class "A"
>amplifier on the market. The second product was an ion speaker [...]
Wasn't it Iverson who made the Vendetta Research phono stage ? Some
reviewers have called this perhaps the best unit of it's kind ever
made. But enough of the product info, who's got some personal
folklore ? I hope it's good news, I've heard some times in the past
have been problematic.
Tom.
--
- Tom Pohorsky to...@Legato.com
Steve Zipser (Sunshine Stereo)
Tom Pohorsky wrote:
> Wasn't it Iverson who made the Vendetta Research phono stage ? Some
> reviewers have called this perhaps the best unit of it's kind ever
> made. But enough of the product info, who's got some personal
> folklore ? I hope it's good news, I've heard some times in the past
> have been problematic.
Nope, you are 100% totally wrong.
John Curl designed the Vendetta.
John Curl designed for Levinson, Dennisen, Parasound & others.
Most importantly for me.......... Curl used to be the sound engineer
for the Grateful Dead! What a long strange trip its been!
Zip
HOW 'BOUT DEM PANTERS
Dey can sure shood dat puck en score dat gole!
Erik Larson
to...@netcom.com (Tom Pohorsky) wrote:
*snip*
>
>Wasn't it Iverson who made the Vendetta Research phono stage ? Some
>reviewers have called this perhaps the best unit of it's kind ever
>made.
Actually the VR phono stage was designed by John Curl, wasn't it?
> But enough of the product info, who's got some personal
>folklore ? I hope it's good news, I've heard some times in the past
>have been problematic.
There was an article about the mysterious disappearance of John
Iverson in TAS awhile back. I don't have the issue nearby so I can't
tell you which it was, and I certainly dare not mention any of the
contents ("not one word..." and all (g)!)...
Best Regards,
Erik
ela...@mcs.com
lar...@mh.cig.mot.com
Bob Olhsson
In article <4o6uvh$1...@biosun.harvard.edu>, "Steve Zipser (Sunshine Stereo)"
<z...@ix9.ix.netcom.com> wrote:
> Most importantly for me.......... Curl used to be the sound engineer
> for the Grateful Dead! What a long strange trip its been!
I've been amazed to discover that an awful lot of the high-end
manufacturers can trace their roots back to the Greatful Dead by way
of Bear or of Healey (who Curl worked for.) Nobody advertises it
though...
--
Bob Olhsson Audio | O tongue, thou art a treasure without end.
Box 555,Novato CA 94948 | And, O tongue, thou art also a disease
415.457.2620 | without remedy. == Jelal'uddin Rumi ==
415.456.1496 FAX |
AudioMaven
> Wasn't it Iverson who made the Vendetta Research phono stage?
[ quoted text deleted -- jwd ]
No, that was John Curl.
Myles Astor
The Audio Adventure
John Nunes
In message <4o4ilv$a...@eyrie.graphics.cornell.edu> - "Steve Zipser
(Sunshine Stereo)" <z...@ix6.ix.netcom.com>24 writes:
>You, of course, left out his two most important - and earliest
>products! One was the Elctro-Research A-75, which (along with Nelson
>Pass's first Threshold amp) was the earliest solid state Class "A"
>amplifier on the market.
Neither one of these were the earliest Class A solid state amplifiers.
Try the British Sudgen. Additionally, neither the ERC A-75 or the
Threshold amplifiers were 'traditional classic' Class A. The A-75 was
biased Class A up to about half its 8 ohm (resistive load) power
output. That's a high bias point for sure, but not really Class A by
definition. The Threshold was a dynamically biased Class A, which
makes it more Class A than the A-75 in a novel sense, but less so by
strict definition.
>The second product was an ion speaker - I never heard it, but people
>who did thought it was spectacular. How it worked is totally beyond
>me, but I think he did it while doing particle weapons research for
>Uncle Sam.
This was never really a product. I think John might have made a few
functional pieces for friends, but it never really made it past the
R&D stage. I heard it several times when he just was able to get a
minimum SPL from them. (about 75 dB) They were the most transparent
midrange on up speaker I have ever heard. But they had no appreciable
output below 500 Hz, so a more conventional driver had to be used
below that. I saw a pair that were about 7'H x 3'W that he claimed
went down to 40 Hz but I never heard those because they kept blowing
up the bias and driving electronics. That he was doing particle
weapons research for "The Gov" as he called it, is not proven to my
knowledge.
FWIW, I believe Iverson was murdered, but nobody that's talking really
seems to know what happened to him.
- John Nunes <cha...@WCO.COM>