Photo Gallery

[mhouston]

@disco: can you show us the underside of the amp section. The amp on the thick timber work with just the tubes poking up.

 

[disco]

Got the idea mate Here you go:

An externally hosted image should be here but it was not working when we last tested it.

Notice the short distance between power tranny, choke and OT.
No hum, no noise at 100dB loudspeaker.
Those R-core can't compete with amorphous core
but are a decent bang for the buck. Mid and highs are nice.
Rod's filament supply is in the frontpanel, at the copper strip.
Coupling done with 1uF Audicap and two 0,1uF Cardas.
The TCC oil is a little inductive, fine for that first position.
Wiring between HT rectifier and first cap is shortest possible.
LV supply has been split in noisy front (near tranny)
and 'clean' end at the tube sockets.
Finishing the plinth is for today, as is tidying up wires.

 

[andRookie]

Inspired by Allen Wright.

6H30 cascode (copy from AW)
EL34/ KT88 output, ccs bias
21st Century Maida Regulator on driver/ input.
5k OPT

 

[RK1]

example

 

[56oval]

example

Very tasty ,a over head shot please

 

[mhouston]

example

Does look good. Better images please.

 

[RK1]

one of the last photos (with speaker)
T?umacz Google

 

[Steve Cresswell]

Here is my latest project.
It is my take on the new Transcendent "Son of Beast" output transformerless tube amplifier.
The design was built from the circuit that appears in Bruce Rozenblit's latest book "Tubes & Circuits"

An externally hosted image should be here but it was not working when we last tested it.

It uses the earlier 40V heater PL509/519 top cap sweep tube rather than the newer production octal based JJ EL509.
Other than that I followed Bruce's circuit and layout to the letter.

Steve

 

[carolus]

Here is my latest project.
It is my take on the new Transcendent "Son of Beast" ...
It uses the earlier 40V heater PL509/519 top cap sweep tube rather than the newer production octal based JJ EL509.
Steve

Hi Steve,
Congrats with your new "son" OTL ...
Nice unit.
Did you a "point-to-point" wiring (or pcb)?
Did you a test/measure about power output (before clipping) and stability Dc-output?
My experiences with OTL T12(concept Trancendent): the PL519 is a good tube (even second hand after test).
(This is not a product placement)

 

[Steve Cresswell]

I did a point to point job.
I have not measured the power output, but Bruce quotes 15WPC.
The amp is rock stable with the DC offset staying at zero once set.
Once the initial setup and consequent settling in period has expired (about three days)
The whole thing is set and forget.

 

[roline]

Are you handing out cigars to celebrate your new son???
Congratulations!!
Can you share a pic of his bottom?

 

[mhouston]

@Steve: Looks stunning.

 

[56oval]

one of the last photos (with speaker)
T?umacz Google

Thanks for the link .ANy chance you could start a thread about your project on diyaudio .

CHeers

Mal

 

[56oval]

Here is my latest project.
It is my take on the new Transcendent "Son of Beast" output transformerless tube amplifier.
The design was built from the circuit that appears in Bruce Rozenblit's latest book "Tubes & Circuits"

An externally hosted image should be here but it was not working when we last tested it.

It uses the earlier 40V heater PL509/519 top cap sweep tube rather than the newer production octal based JJ EL509.
Other than that I followed Bruce's circuit and layout to the letter.

Steve

Love top caps

Cheers

 

[TonyTecson]

Love top caps

Cheers

+1....

 

[p_ete2003]

+1

edit: here's my Rozenblitz based on the 6AS7G OTL schema:

 

[Steve Cresswell]

Niiiice

 

[rcavictim]

Here is my latest project.
It is my take on the new Transcendent "Son of Beast" output transformerless tube amplifier.
The design was built from the circuit that appears in Bruce Rozenblit's latest book "Tubes & Circuits"

An externally hosted image should be here but it was not working when we last tested it.

It uses the earlier 40V heater PL509/519 top cap sweep tube rather than the newer production octal based JJ EL509.
Other than that I followed Bruce's circuit and layout to the letter.

Steve

Steve,

The appreciation of loving care in one's work transcends dimensions. I love your guests.

 

[Nos2005]

Hi from Russia!
my first tube amplifier

An externally hosted image should be here but it was not working when we last tested it.

 

[azazello]

Cooool! /Snogshibatelno!/