Citation 12 Schematic

[mereilly]

Anyone with a schematic for the 12 . Thanks

 

[llwhtt]

Go to PassDIY, articles, 1981 and there is a schematic of the stock amp and one for MOSFET mod. from the Audio Amateur magazine. Good reading on how to bias an amplifier too.

Craig

 

[mereilly]

Thanks man , I am itching to get this started.

 

[tiefbassuebertr]

sometimes denied google the access
here the PDF article from Audio Amateur:
http://cygnus.ipal.org/mirror/www.passlabs.com/images/citation.pdf

 

[mereilly]

Citation 12

Thanks. All I have to do is do it. Thanks again. I will post progress of the project.
Mike

 

[jeepy]

Hello,
I cannot find the components to upgrade a HK Citation 12 to the Nelson Pass version. Do you ave any idea?
Thanks,
Jean-Paul

 

[tiefbassuebertr]

check out this thread:
http://www.diyaudio.com/forums/pass...omplementary-mosfet-citation-12-taa-book.html
You need the related edition of the Audio Amateur Version or the book (right hand) about
BKAA40 - Audio Amateur Power Amp Projects
Here additional URL
HK Citation 12 Bi70mk2 Retrofit; Altec 617-8A by Mark Nash
Welkom op Audiopaul.nl! - De audiofiele website met setbeschrijving, muziek, reviews en meer.
AVForum.hu -> Harman/Kardon Citation Twelve (12)

 

[jeepy]

Thank you. I will definitely order the book and read all posts in detail. However I could hardly find some IRF 130 for sale but no MPS L01 and MPS L51 transistors and I have no idea concerning the best equivalent parts for the Nelson Pass design! I am switching back from tube amps to transistors after more than25 years so I have to start almost from scratch!
Jean-Paul/Switzerland

 

[Nelson Pass]

At both Pass Laboratories and FIRST WATT HOME you can find
the original piece, and also a parts substitution article for it.

😎

 

[tiefbassuebertr]

Thank you. I will definitely order the book and read all posts in detail. However I could hardly find some IRF 130 for sale but no MPS L01 and MPS L51 transistors and I have no idea concerning the best equivalent parts for the Nelson Pass design! I am switching back from tube amps to transistors after more than25 years so I have to start almost from scratch!
Jean-Paul/Switzerland

actually you must find successors here:
Small Signal Transistor - Fairchild Semiconductor Site Search
At best you contact Fairchild and ask for successors. Sometimes the same internal structur from the old models is inside in SMD outline but completly other model number ("PZT" instead "2N" e. g. or completly other). Concerning the IRF130 ask International Rectifier. Semelab still offer successors to the old TO-3 ones as I know - check out the site of
TT electronics Semelab - Discrete Semiconductor Design, Packaging, Testing & Supply
Semelab - Mil/Aerospace Division - FETS, JFETs & IGBTs

 

[jeepy]

At both Pass Laboratories and FIRST WATT HOME you can find
the original piece, and also a parts substitution article for it.

😎

It is an honor for me Mr Pass. Your writings will be my Bible. Thanks
Jean-Paul / Switzerland

 

[jeepy]

actually you must find successors here:
Small Signal Transistor - Fairchild Semiconductor Site Search
At best you contact Fairchild and ask for successors. Sometimes the same internal structur from the old models is inside in SMD outline but completly other model number ("PZT" instead "2N" e. g. or completly other). Concerning the IRF130 ask International Rectifier. Semelab still offer successors to the old TO-3 ones as I know - check out the site of
TT electronics Semelab - Discrete Semiconductor Design, Packaging, Testing & Supply
Semelab - Mil/Aerospace Division - FETS, JFETs & IGBTs

Great idea I will do that also. Thanks