It is very important to treet others with respect

They can then bring out the best in themselves.

CV of Georgios Tsakiris

The pleasure of meeting yesterday Alexandros and his unique kindness is an inspiration on making a better CV. Or at least one that I can enjoy writing.

Born in 1972 in Athens.

1972-1982 (0 to 10 years old)

Piano lessons at National Conservatory

Starting teaching myself the ability to recognize musical notes by ear. It is something very useful that can help understanding how notes are combined together even when passing through any place where music is being played. I still seek to improve it everyday as any newly discovered interesting song is always a challenge. Recognizing the notes in the bass is the most difficult but once this can be mastered the door to understanding opens as the word bass can be traced in the Hellenic word "Βασις" meaning foundation [1]. Below is the song Bones by Telenova which reveals itself beginning with the bass only:

Of course lack of this ability is no obstacle in enjoying or even composing great music.

First attempts in constructing electronic circuits, radio receiver, transmitter, amplifier on the pedagogic games Polycyclomatic 1002 or 501, discovered on a schoolmate's party. The electric and mechanical connection of the electronic components is done with springs while following the assembly instruction schematic. At the time I did not know what an amplifier is so when noting was heard on the speaker except a click sound I was puzzled to what was done wrongly.. Disappointment have itself to joy when a radio receiver was connected to it and music appeared clearly heard in the room. The simplicity and nice sound of these experiments are still an inspiration on designing or improving the simplest possibly electronic circuits.

2012-2022 (40 to 50 years old)

Having the pleasure to meeting again and interviewing legendary Hellenic songwritter Mimis Plessas in his 90s, on how he crafted some of his songs. The series is called Sectrets of Music (Μυστικά της Μουσικής). Here is the 1st episode recorded in binaural (3D recording) using the Pleiades binaural microphone (in ear headphones converted to housing a small microphone capsule for each ear). It is to be listened with headphones:

First sucess in making high end batterry powered audio power amplifiers operating in class A1 (electrons flowing all the time) with only one active device per channel (transistor or electron tube). The Pleiades 2N3053 currently the near field monitoring speaker power amplifier in Pleiades studio lab.

2022-

First sucess in making a high end battery powered DL series electron tube audio power amplifier with only one electron tube per channel, no other active or passive device (no capacitors, resistors) except an input and an output transformer and 3 battery power supplies. It is found that such high end amplifier was patented by Arnold 100 years ago. 

Current unfinished projects:

Designing and producing prototype of:

Pleiades EF183 or EL84 single ended class A1 audio power amplifier with no negative feedback with an input transformer instead of an extra electron tube

Pleiades DL94 batterry powered class A1 audio power amplifier with no negative feedback and an input transformer instead of an extra electron tube

Pleiades DK series battery powered electron tube microphone booster preamplifier

Continuing The Melody Book

Continuing the book A Letter to Clive Davies

Recording outdoors vocals or other instruments in order to have almost no reverberation at low frequecies

 

Despina Vandi signal path

At your risk.

Today meeting by chance Giorgos, I asked and  his kind reply was:

Neumann U87 to mixing desk preamp to DBX 160XT compressor.

Making an outdoors recording of drums or percussion with the Shure Unidyne B and SONY TC-D5M

 At your risk.

Such a recording was made at Varkiza beach near Athens.

Just one mic and one cassette track was used.

Amazing sound quality. Crisp and clear. 

Same with recording singing voice in the forest.

No processing needed, just the Shure Unidyne B microphone directly connected to the Sony cassette recorder.

Bones - Telenova

 At last I found from Vicky what is the name of this nice song I had heard on FM radio in Athens:

Pleiades EF183 Audio Power Amplifier in Class A1 Operation

 At your risk.

While contemplating building a single ended EL84 power amplifier driven by a 1;12 input transformer instead of a driver electron tube...

It was decided to try the EF183 as a triode connected power amplifier which has a similar pinout and much less power consumption.

It sounded expressive, loud and smooth.

Operating conditions:

Vb=120V

V(Rk)=2.4V (V across 120ohm cathode resistor) hence

Ik=20mA

Ck=100uF

input transformer 1:12

output transformer 5Kohm:4ohm 3Watt, (possibly from Collins receiver)

Rg=470Kohm

input transformer is coupled to control grid by use of a coupling capacitor  

Signal Path:

Big in Japan-Alphaville, on CD - SONY CD Walkman line out - Pleiades EF183 - Celestion Ditton 150 (8ohm speaker typically 30ohm at mid band).

The PSU used is a top quality component, military power transformer, 5U4 rectifier electron tube, choke input filter, paper in oil 10uF capacitor, 10Kohm 10W dropping resistor, 50uF electrolytic capacitor. All this is overrated as this PSU was intended for higher power.

life is Too...

 Life is too short to have time-space for sorrow or too long for happiness.