Schematic for Siemens F2a tube amp

MarW · 25th November 2004, 11:47 AM

Dear all,

I am searching for a schematic of a tube amp using the Siemens F2a tube in push-pull.

Can anybody help?

Many thanks in advance.

Best regards,
Markus

fdegrove · 26th November 2004, 12:19 AM

Hi,

Quote:

I am searching for a schematic of a tube amp using the Siemens F2a tube in push-pull.

If I'm not mistaken the F2A was developed and made by Telefunken.
One of AEG-TFK own amps used this type of tube in a P-P configuration. It was called the V69 (a, b).

Here's some info that may be of interest to you:

SHINROCK TREASURY TROVE....

Cheers,

gingertube · 26th November 2004, 02:06 AM

Have a look at this one.

http://www.ndh.net/home/kboehm/AMP-f2a.htm

Top triode in the driver acts as cathode follower for low inpedance grid drive of the output tubes. Transformer phase splitter.

Cheers,
Ian

garbage · 26th November 2004, 02:11 AM

Quote:

Originally posted by MarW

I am searching for a schematic of a tube amp using the Siemens F2a tube in push-pull.

try this

cheers
garbage

RE 604 · 26th November 2004, 06:26 AM

Hello Frank ,
the idea and concept of the V 69 came from engineers and technicians from the "Abteilung Zentraltechnik" des NWDR ( Nord Westdeutscher Rundfunk ) and Telefunken only build this amp with F2a11 ( same as F2a , other socket ) and this tubes were only build bei Siemens . TFK had their EL 156 at this times ( which only came from TFK , no other manufacturers ) , their was no need for a further power tube . You can buy EL 156 with a Siemens logo , but they are TFK . I have never seen a F2a(11) with an other logo than Siemens ( and I have many of this tubes and also V 69 amps from TFK in their O 85 studio monitor ) .
Regards , AlexK .

ks-JPN · 17th March 2005, 08:10 AM

Schematic for F2a is here.

http://www2u.biglobe.ne.jp/~tossie/F2aPP_sch-1.gif;)

radio · 07:35 AM

Quote:

Originally Posted by ks-JPN

Schematic for F2a is here.

http://www2u.biglobe.ne.jp/~tossie/F2aPP_sch-1.gif;)

Hi all!
Do not open this Web page. Give your all to pray in pdf or jpg?!
To see the pattern? And let it be English language !!
Thanks and cheers !!

quikie22 · 12th August 2011, 07:33 AM

The correct link...
http://www2u.biglobe.ne.jp/~tossie/F2aPP_sch-1.gif

25th November 2004, 11:47 AM	#1
MarW diyAudio Member Join Date: Nov 2004 Location: ...	Schematic for Siemens F2a tube amp Dear all, I am searching for a schematic of a tube amp using the Siemens F2a tube in push-pull. Can anybody help? Many thanks in advance. Best regards, Markus

26th November 2004, 06:26 AM	#5
RE 604 diyAudio Member Join Date: Oct 2003 Location: Germany	Hello Frank , the idea and concept of the V 69 came from engineers and technicians from the "Abteilung Zentraltechnik" des NWDR ( Nord Westdeutscher Rundfunk ) and Telefunken only build this amp with F2a11 ( same as F2a , other socket ) and this tubes were only build bei Siemens . TFK had their EL 156 at this times ( which only came from TFK , no other manufacturers ) , their was no need for a further power tube . You can buy EL 156 with a Siemens logo , but they are TFK . I have never seen a F2a(11) with an other logo than Siemens ( and I have many of this tubes and also V 69 amps from TFK in their O 85 studio monitor ) . Regards , AlexK . __________________ No reason to get excited : Jimi Hendrix .

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26th November 2004, 02:06 AM	#3
gingertube diyAudio Member Join Date: Oct 2004 Location: Adelaide South Oz	Have a look at this one. http://www.ndh.net/home/kboehm/AMP-f2a.htm Top triode in the driver acts as cathode follower for low inpedance grid drive of the output tubes. Transformer phase splitter. Cheers, Ian

17th March 2005, 08:10 AM	#6
ks-JPN diyAudio Member Join Date: Mar 2005 Location: Japan	Schematic for F2a is here. http://www2u.biglobe.ne.jp/~tossie/F2aPP_sch-1.gif;)

12th August 2011, 07:33 AM	#8
quikie22 diyAudio Member Join Date: Sep 2009	The correct link... http://www2u.biglobe.ne.jp/~tossie/F2aPP_sch-1.gif

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