PHASE LINEAR 400 SERIES TWO

sakis · 25th August 2011, 08:23 AM

i am happy to have one of these for service ...

i was wondering if anyone knows who is the designer of this amplifier . Looking at the style of heatsinks that remind very much the Grandson from GAS ..

thanks
Sakis

poynton · 25th August 2011, 09:00 AM

The answer is in one of the threads on the forum.
I have most of them saved but could not find it in a quick look! Too busy at the moment !

Andy

.

sakis · 25th August 2011, 09:12 AM

was too lasy to google it ..... but actually i did

the onlu true designer with six tons of inovation in each and every design !!!

BOB CARVER !!!

Tajzmaj · 25th August 2011, 02:57 PM

I don't know what is wrong with your amp but if you need to replace outputs than match them......and adjust the idle again. If you need I have some information ......
At the end check it for oscillations and instabilities at clipping....maybe you will need to install some caps to reduce such things.....And finally. If you want to upgrade it be careful. For an example. you can expect some problems if input op amp is replaced with some other type.....
Feel free to ask. I have some experience with those ,,PL,, amps.
Best regards, Taj

sakis · 25th August 2011, 03:00 PM

thanks Taj for your kind help ... dont worrie i have my way arround amplifiers ... if it comes need though i will let you know

thanks again

sregor · 25th August 2011, 06:34 PM

AFAIK the Phase Linear series two amps were built after Carver sold the company to Pioneer - So probably had some Pioneer engineers in the differences between the series two and earlier designs - Like full complimentary symmetry and Japanese outputs. Just my 2 cents.

sakis · 25th August 2011, 07:00 PM

havent opened the unit yet but i will and let you know and post pictures

sakis · 25th August 2011, 07:22 PM

ok ...this got to be some medium state unit it works with LF356 and outputs are xpl 909 driven by an RCA 66546

eventhough in the service manual are writen all available options like MJ15024 or 2SD555 ( very helpfull of them )

Good machine to play with i think ...
i wonder how happy this amp will be if opamps are replaced to something more modern ...

Nice weekend toy for me

kind regards sakis

sakis · 07:59 PM

very playfull machine ...so easy to open and work on like i never seen before ... then again the service manual is also very informative ...
very very nice

tiefbassuebertr · 25th August 2011, 08:20 PM

check out this threads:
A simple stereo Amp aroud a 2N3773
Need help fixing an odd Phase Linear 400

25th August 2011, 08:23 AM	#1
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	PHASE LINEAR 400 SERIES TWO i am happy to have one of these for service ... i was wondering if anyone knows who is the designer of this amplifier . Looking at the style of heatsinks that remind very much the Grandson from GAS .. thanks Sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

25th August 2011, 09:00 AM	#2
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	The answer is in one of the threads on the forum. I have most of them saved but could not find it in a quick look! Too busy at the moment ! Andy . __________________ If it ain't broke, break it !! Then fix it again. It's called DIY !

25th August 2011, 09:12 AM	#3
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	was too lasy to google it ..... but actually i did the onlu true designer with six tons of inovation in each and every design !!! BOB CARVER !!! __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

25th August 2011, 03:00 PM	#5
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	thanks Taj for your kind help ... dont worrie i have my way arround amplifiers ... if it comes need though i will let you know thanks again __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

25th August 2011, 06:34 PM	#6
sregor diyAudio Member Join Date: Jan 2006 Location: massachusetts	AFAIK the Phase Linear series two amps were built after Carver sold the company to Pioneer - So probably had some Pioneer engineers in the differences between the series two and earlier designs - Like full complimentary symmetry and Japanese outputs. Just my 2 cents. __________________ Steve


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25th August 2011, 02:57 PM	#4
Tajzmaj diyAudio Member Join Date: Mar 2011 Location: Ljubljana	I don't know what is wrong with your amp but if you need to replace outputs than match them......and adjust the idle again. If you need I have some information ...... At the end check it for oscillations and instabilities at clipping....maybe you will need to install some caps to reduce such things.....And finally. If you want to upgrade it be careful. For an example. you can expect some problems if input op amp is replaced with some other type..... Feel free to ask. I have some experience with those ,,PL,, amps. Best regards, Taj

25th August 2011, 07:00 PM	#7
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	havent opened the unit yet but i will and let you know and post pictures __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

25th August 2011, 07:22 PM	#8
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	ok ...this got to be some medium state unit it works with LF356 and outputs are xpl 909 driven by an RCA 66546 eventhough in the service manual are writen all available options like MJ15024 or 2SD555 ( very helpfull of them ) Good machine to play with i think ... i wonder how happy this amp will be if opamps are replaced to something more modern ... Nice weekend toy for me kind regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

25th August 2011, 07:44 PM	#9
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	very playfull machine ...so easy to open and work on like i never seen before ... then again the service manual is also very informative ... very very nice __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr Last edited by sakis; 25th August 2011 at 07:59 PM.

25th August 2011, 08:20 PM	#10
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	check out this threads: A simple stereo Amp aroud a 2N3773 Need help fixing an odd Phase Linear 400

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