• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

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Wavebourn

Wavebourn

Member
Joined 2006
wavebourn.com
Sander'Z said:
RIAA preamp.
Click to expand...

Wow!

Looks very nice!
sm36.gif


How quiet are 6N9S? What kind of input transformers do you use?
 
h00hbt

h00hbt

Member
Joined 2007
facebook.com/?ref=home#!/pages/KR-TUBE-AUDIO/113192315379581
This is my latest build a PP KT88 weighing in at 55kg (121lbs) Wood was originaly the decking on the sailing ship Pommern Pommern
, 150 year old Mahogony. Stainless steel is 3mm thick. Transformers are from Bartolucci Ricerca e Sviluppo - Bartolucci Transformers - Welcome to Ricerca e Sviluppo - Bartolucci Transformers. Tubes: KT88, ECC99, 6SN7 and rect GZ34.

CIMG0244.jpg


More pics here.

http://i17.photobucket.com/albums/b62/h00hbt/CIMG0199-1.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0207.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0226.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0227.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0228.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0229.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0231.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0232.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0233.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0234.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0235.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0236.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0238.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0240.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0241.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0242.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0244.jpg

BOATANCHOR :)
 
Last edited:
M

Morfendite

Member
Joined 2010
h00hbt said:
This is my latest build a PP KT88 weighing in at 55kg (121lbs) Wood was originaly the decking on the sailing ship Pommern Pommern
, 150 year old Mahogony. Stainless steel is 3mm thick. Transformers are from Bartolucci Ricerca e Sviluppo - Bartolucci Transformers - Welcome to Ricerca e Sviluppo - Bartolucci Transformers. Tubes: KT88, ECC99, 6SN7 and rect GZ34.

CIMG0244.jpg


More pics here.

http://i17.photobucket.com/albums/b62/h00hbt/CIMG0199-1.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0207.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0226.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0227.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0228.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0229.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0231.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0232.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0233.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0234.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0235.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0236.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0238.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0240.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0241.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0242.jpg
http://i17.photobucket.com/albums/b62/h00hbt/CIMG0244.jpg

BOATANCHOR :)
Click to expand...


Man, we have some common interessts (spelling?), I'm also quite much into these old ships. (Pro ship repairs) But now I have this old house of mine (late 1800) where I try to fit audio stuff that match the origin of the house. Tube amps are allright but I have to make my big speakers look like something else, or at least, something really old. That's my challenge. And, the sound has to be top noch as well...'

Any way, merry christmas everyone!
 
rcavictim

rcavictim

Member
Joined 2004
AirPower said:
Schematic for 1 channel:
Click to expand...

Air power,

Very impressive! I wonder how much trouble you have with some 6C19 output triodes running too hot an others too cold since I see no automatic bias equalization scheme such as larger value cathode resistors under each cathode for example. I am trying to get started on a OTL amp using 18, 6080's per monobloc (36 triodes) and with that tube I absolutely have to include some individual cathode self bias on each triode over and above the master negative grid bias bus. Of course this compromises the desired low tube plate R.
 
H

head1962

Member
Joined 2008
timeandtubes.blogspot.com/
RS 329g Telefunken

Hi guys!
I found this tube a while ago, thought it needs to become an amp.
It's huge! The heater needs 24V @ 16Amps
It lights up bright white!!
With my 400V transformer from the junk box I get almost 6 Watts out of it!
The driver is a 6EM7 wired as a cathode follower.
The RS329 is biased at 30V (because my power supply doesn't go higher)
I've ordered a new trasformer to run it at 700V or so.
Should be good for 15 Watts or so.
The output transformer is a Hammond.
I'll post the diagram tomorrow, first some listening to do.
Here's some more pics
http://rs329.blogspot.com/
and here
http://picasaweb.google.com/head1962/RS329#
 

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FastEddy

FastEddy

Member
Joined 2006
4ourbees.com
head1962 said:
...I found this tube a while ago, thought it needs to become an amp. It's huge! The heater needs 24V @ 16Amps . It lights up bright white!! With my 400V transformer from the junk box I get almost 6 Watts out of it!...
Click to expand...

Oh, wow! 6 Watts from what? is that 24v @ 1.6 Amps or 16 Amps to the heater?? ... I'll bet it sounds great and you get a nice white reading lamp to boot! Too cool: :D
 
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