Latest news regarding this site:


Latest news (August 17th 2008)
Updated chapter measurements, with link to Rod Elliot website regarding Small Thiele loudspeaker parameters.

Latest news (June18th 2007)
Updated separating the site www.transparentsound.com with www.vintagetransistors.com
"Vintage Transistors", "RCA 2N109, 2N139 and 2N140" Germanium Transistors.
"Vintage Transistors", "AMD" implemented in chapter Brand History

Latest news (June7th 2007)
Updated "Vintage Transistors & Diodes", "Western Electric" 12B Germanium Transistor and WECO 420B Germanium Diode.

Latest news (May27th 2007)
Updated "Vintage Transistors & Diodes", "Western Electric" 4D" and "Delco" "2N256" Power Germanium Transistor.

Latest news (May17thd 2007)
Updated "Vintage Transistors & Diodes", "Sylvania" 2N68, 2N102, 2N143, 2N144, 2N247, 2N255 and 2N711 Germanium Transistors.

Latest news (May 9th 2007)
Updated "Vintage Transistors & Diodes", "WECO" 2N110 Transistor and "WECO" GA50649 Varistor.

Latest news (May 3th 2007)
Navigation of the site totally revised, "Vintage Transistor" implemented in the site.
Updated "Vintage Transistors & Diodes", "RCA" 2N109-C and Sylvania's BIG-9 replacement kit.

Latest news (April 14th 2007)
Updated "Vintage Transistors & Diodes", "Delco" 2N174 Power Transistor.

Latest news (March 30th 2007)
Updated "Vintage Transistors & Diodes", "Western Electric" A1698, A1768 and $B & 4C PNP Low Power Transistors,
"Philips" OC71 PNP Low Power Transistor, "RCA"2N2339 Medium Power PNP Transistor

Latest news (March 9th 2007)
Updated "Vintage Transistors & Diodes", "TI" 2N542 SI Low Power Transistor, "ITT" 4E50 Four-Layer Shockley Diode

Latest news (March 8th 2007)
Updated "Vintage Transistors & Diodes", "RCA" 2N109, 2N247, 2N647, 40235, "Zenith" 121-361

Latest news (March 4nd 2007)
Updated "Vintage Transistors & Diodes", Photo's  General Purpose Regulator Diode, 2N1530A from Hoffman.

Latest news (March 2nd 2007)
Announcement coming soon new transistors, "RCA" 2N109, 2N247, 2N647, 40235, "Zenith" 121-361

Latest news (February 18th 2007)
Updated "Vintage Transistors & Diodes", Manufactory  "GPC, Germanium Products Corp."

Latest news (February 16th 2007)
Updated "Vintage Transistors & Diodes", Photo's  Germanium Power PNP Transistor, AD149 Mullard,
Germanium Power PNP Transistor, OC45 Mullard.

Latest news (February 9th 2007)
Updated "Vintage Transistors & Diodes", Photo's  Germanium Power PNP Transistor, 2N101 Sylvania,
Germanium Power PNP Transistor, 2N26 CBS, Germanium Power PNP Transistor, 2N1523 Delco.

Latest news (February 6th 2007)
Updated "Vintage Transistors & Diodes", Photo's  Germanium PNP Transistor, 2N34 Sylvania".

Latest news (January 30th 2007)
Updated "Vintage Transistors & Diodes", Manufactory  "Bendix" & "Transistor products Inc."

Latest news (January 28th 2007)
Updated complete navigation of the website with interactive knobs and tabs.

Latest news (January 26th 2007)
Updated "Vintage Transistors & Diodes", Manufactory  "Van der Heem".

Latest news (January 24th 2007)
Updated "Vintage Transistors & Diodes", Photo's  Germanium PNP Point Contact Transistor, 2N23 Western Electric".

Latest news (January 21th 2007)
Updated "Vintage Transistors & Diodes", Photo's ZJ3-1 Prototype Germanium PNP Transistor,  General Electric.
Updated "Vintage Transistors & Diodes", Manufactures "Intermetall", "Standard Elektrik Lorenz", "TeKaDe" and "Westinghouse".

Latest news (January 19th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "British Thomson Houston".

Latest news (January 17th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Fujitsu-Ten", "Radio Receptor", "Clevite", "Newmarket" and "Pye Ltd.".

Latest news (January 15th 2007)
Updated "Vintage Transistors & Diodes", Photos Power Transistor 2N173 Motorola
Updated "Vintage Transistors & Diodes", Manufactures "Western Electric"

Latest news (January 13th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Mitsubishi"

Latest news (January 12th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Toshiba"

Latest news (January 11th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Delco" and "NEC"

Latest news (January 10th 2007)
Updated "Vintage Transistors & Diodes", Photos Proto type 2N176 Motorola
Updated "Vintage Transistors & Diodes", Manufactures "National Union"

Latest news (January 9th 2007)
Updated "Vintage Transistors & Diodes", Proto type PNP Germanium Transistor ZJ7 from General Electric
Updated "Vintage Transistors & Diodes", Manufactures "Transitron"

Latest news (January 8th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Spraguel"

Latest news (January 7th 2007)
Updated "Vintage Transistors & Diodes", Manufactures "Tung-Sol", "Honeywell" and "Zenith"

Latest news (January 4th 2007)
Updated "Vintage Transistors & Diodes", BA6 and CK722 Blister Germanium PNP transistors

Latest news (December 31th 2006)
Updated Transistor page index included Manufactory history "Amperex" & "Valvo"

Latest news (December 28th 2006)
Updated Transistor page index included Manufactory history

Latest news (December 22th 2006)
Updated "Vintage Transistors & Diodes", XN2, T2546, CK760A,  2N306, 2N393, 2N501A Germanium transistors
Updated "Vintage Transistors & Diodes", OA10, SX635 Germanium Zener Diodes

Latest news (December 6th 2006)
Updated "Vintage Transistors & Diodes", 2N417-1 and 2N417-2 Germanium PNP transistors

Latest news (December 3th 2006)
Updated "Sphinx EDA", Myth-7 Tuner, PJ-18MK2 Power Amplifier

Latest news (December 1th 2006)
Updated "Sphinx EDA"", Phono Equaliser

Latest news (November 30th 2006)
Updated "Vintage Transistors & Diodes" with pre-announcement XN2 & T2565

Latest news (November 9th 2006)
Updated "Vintage Transistors & Diodes" with pre-announcement 2N417

Latest news (November 4th 2006)
Updated "Vintage Transistors & Diodes"

Latest news (October 24th 2006)
New site "Vintage Transistors & Diodes implemented"

Latest news (October 23th 2006)
Sphinx EDA drawings PJ2MK2 in pdf format available for restricted users

Latest news (September 22th 2006)
Sphinx EDA drawings PJ-12 in pdf format available for restricted users

Latest news (July 24th 2006)
Website removed to Windows Active24 Server

Latest news (March 28th 2005)
Update PAF Table.

Latest news (March 15th 2005)
Update animated amp.gif.

Latest news (March 6th 2005)
New page structure.

Latest news (March 1th 2005)
Noise & dB buttons and Amp logo placed.

Latest news (February 23th 2005)
Announcement of the new page "The fundamentals of Balanced Lines.

Latest news (February 5th 2005)
Decibel page updated.

Latest news (January 6th 2005)
Decibel page appended.

Latest news (January 4th 2005)
Noise page and measurement page updated.

Latest news (January 1th 2005)
Noise page appended.

Latest news (December 12th, 2004)
The Measure page is updated with schematics and test sound.


Latest news (December 4th, 2004)

The site is updated with Measure page items, text changes.

Latest news (November 27th, 2004)
The site is updated with Measure page.

Latest news (November 21th, 2004)

The site is updated with For Sale page.

Latest news (November 12th, 2004)
The site is updated with the several book descriptions.

Latest news (November 7th, 2004)   

The site is updated with the Tunnel Pulser and the modified Thorens TD-316.

Latest news (October 24th, 2004)
Transparent Sound has updated the web-site and is still under construction. Suggestions are welcome.

Latest news (October 3th, 2004)

As from November 1, 2004 Marcel Konstapel is no longer participating in Transparent Sound. Jan de Groot will continue to run Transparent Sound as a one man company. Because Marcel was responsible for embedded software design, this part of Transparent Sound will for the moment no longer exist. However, analogue and digital hardware design, which was and is the responsibility of Jan, will continue.

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