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-   -   FA: Ugliest homebrew linear project EVER - Ebay ad, but ya gotta see this (https://www.radiobanter.com/homebrew/21867-fa-ugliest-homebrew-linear-project-ever-ebay-ad-but-ya-gotta-see.html)

GS December 10th 03 10:22 PM

FA: Ugliest homebrew linear project EVER - Ebay ad, but ya gotta see this
 
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3064839871


Please - I almost never post Ebay stuff in this group, unless it very
specifically relates to the homebrew crowd.

I'm posting just cuz you HAVE TO SEE this piece of work. LOTS
of photos - possibly the most hideous homebrew amplifier ever!
If the guy didn't die testing it, I'd be surprised....

Again, sorry for the Ebay post. Don't bid - just look. It's amazing

GS



kenneth scharf December 11th 03 02:23 AM

GS wrote:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3064839871


Please - I almost never post Ebay stuff in this group, unless it very
specifically relates to the homebrew crowd.

I'm posting just cuz you HAVE TO SEE this piece of work. LOTS
of photos - possibly the most hideous homebrew amplifier ever!
If the guy didn't die testing it, I'd be surprised....

Again, sorry for the Ebay post. Don't bid - just look. It's amazing

GS


Looks like this amp was designed for 3 811A's (three sockets), maybe he
dropped
one of the tubes?

BTW I built an amp almost as ugly about 15 years ago using a pair of
4-400A's.
Mine was at least safe, and it even worked on 80-20, above that the tank
was not optimal and it worked poor. On 80 it tuned as broad as a barn, but
I've seen SB-200's do that too. Mine was built in a pair of boxes one
on top of the
other that came out of a surplus computer system. The top box was the
rf box (used
to hold the disk drives) the bottom box was the power supply (used to
hold the rest
of the computer) so it looked like a sick Henry 2K. The only power
transformer
I could find had a 120v primary, but it was good for a real 2kw. (when ever
I tuned up for more than 20 seconds I blew the 20A breaker). The plate
supply
was plugged into one outlet on it's own line, the relay and filament
supply was
plugged into a second outlet on a different line. I had a FWB rectifier
using
1N4007's, each leg had 10 diodes in series with equalizing resistors and
caps
(WAY over built). The secondary put out almost 3kv no load, so the
tubes were
running a little over 4kv. The filter was 10 400uf 450v computer grade caps
in series, with 20k resistors across each. A real MONSTER of a supply.
There was a power resistor in series with the primary that was shorted
out by a relay
across a sensing resistor in series with the primary as well. This gave
the HV
supply a soft start so the capacitors charging wouldn't zap the diodes.
Wish I kept a photo of my Frankenstein machine.



kenneth scharf December 11th 03 02:23 AM

GS wrote:
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3064839871


Please - I almost never post Ebay stuff in this group, unless it very
specifically relates to the homebrew crowd.

I'm posting just cuz you HAVE TO SEE this piece of work. LOTS
of photos - possibly the most hideous homebrew amplifier ever!
If the guy didn't die testing it, I'd be surprised....

Again, sorry for the Ebay post. Don't bid - just look. It's amazing

GS


Looks like this amp was designed for 3 811A's (three sockets), maybe he
dropped
one of the tubes?

BTW I built an amp almost as ugly about 15 years ago using a pair of
4-400A's.
Mine was at least safe, and it even worked on 80-20, above that the tank
was not optimal and it worked poor. On 80 it tuned as broad as a barn, but
I've seen SB-200's do that too. Mine was built in a pair of boxes one
on top of the
other that came out of a surplus computer system. The top box was the
rf box (used
to hold the disk drives) the bottom box was the power supply (used to
hold the rest
of the computer) so it looked like a sick Henry 2K. The only power
transformer
I could find had a 120v primary, but it was good for a real 2kw. (when ever
I tuned up for more than 20 seconds I blew the 20A breaker). The plate
supply
was plugged into one outlet on it's own line, the relay and filament
supply was
plugged into a second outlet on a different line. I had a FWB rectifier
using
1N4007's, each leg had 10 diodes in series with equalizing resistors and
caps
(WAY over built). The secondary put out almost 3kv no load, so the
tubes were
running a little over 4kv. The filter was 10 400uf 450v computer grade caps
in series, with 20k resistors across each. A real MONSTER of a supply.
There was a power resistor in series with the primary that was shorted
out by a relay
across a sensing resistor in series with the primary as well. This gave
the HV
supply a soft start so the capacitors charging wouldn't zap the diodes.
Wish I kept a photo of my Frankenstein machine.



GS December 11th 03 05:12 AM

__________________________________________________ _______

I used to have a car I'm pretty sure was built by this guy.


ROTFLMAO!!!!

That is SO funny! Ya know? I think I DID TOO!!!

Dave
Greatsurplus



GS December 11th 03 05:12 AM

__________________________________________________ _______

I used to have a car I'm pretty sure was built by this guy.


ROTFLMAO!!!!

That is SO funny! Ya know? I think I DID TOO!!!

Dave
Greatsurplus



Bob P December 11th 03 11:43 AM

Well, at least the builder had the initiative to actually build some radio
gear, albiet a bit rough around the edges. Every edge.
Bob
kb8tl at arrl dot net



Bob P December 11th 03 11:43 AM

Well, at least the builder had the initiative to actually build some radio
gear, albiet a bit rough around the edges. Every edge.
Bob
kb8tl at arrl dot net



Paul Burridge December 11th 03 05:31 PM

On Wed, 10 Dec 2003 22:22:07 GMT, "GS"
wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3064839871


Please - I almost never post Ebay stuff in this group, unless it very
specifically relates to the homebrew crowd.

I'm posting just cuz you HAVE TO SEE this piece of work. LOTS
of photos - possibly the most hideous homebrew amplifier ever!
If the guy didn't die testing it, I'd be surprised....

Again, sorry for the Ebay post. Don't bid - just look. It's amazing


LOL! Sure is! BTW, you'll probably find the guy who built is is just
no good with his hands. He's probably a genius when it comes to the
theoretical side of the hobby. Seen it before so many times it works
that way.
--

"I expect history will be kind to me, since I intend to write it."
- Winston Churchill

Paul Burridge December 11th 03 05:31 PM

On Wed, 10 Dec 2003 22:22:07 GMT, "GS"
wrote:

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3064839871


Please - I almost never post Ebay stuff in this group, unless it very
specifically relates to the homebrew crowd.

I'm posting just cuz you HAVE TO SEE this piece of work. LOTS
of photos - possibly the most hideous homebrew amplifier ever!
If the guy didn't die testing it, I'd be surprised....

Again, sorry for the Ebay post. Don't bid - just look. It's amazing


LOL! Sure is! BTW, you'll probably find the guy who built is is just
no good with his hands. He's probably a genius when it comes to the
theoretical side of the hobby. Seen it before so many times it works
that way.
--

"I expect history will be kind to me, since I intend to write it."
- Winston Churchill

kenneth scharf December 12th 03 01:41 AM

Bob P wrote:
Well, at least the builder had the initiative to actually build some radio
gear, albiet a bit rough around the edges. Every edge.
Bob
kb8tl at arrl dot net



If you look in some of the old QST's from the 20's you'll see
most of the early transmitters were just as ugly. Old spark gap
monsters!



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