WOPL Sniffer
Veteran and General Yakker
If I understood Ed correctly, they didn't make Clair 400's... Although I could glue a Clair 700 II face on there... WHY??? who knows.
700 Series II Clair Originality
- Thread starter WOPL Sniffer
- Start date
WOPL Sniffer
Veteran and General Yakker
In Przem write up, page 8 in modifications, he suggest "Installing reservoir electrolytic caps" (4.7uf 35V) in parallel with D1 and D2). Being these are Zener diodes, is the Negative side of the cap going to attach to the anode (non banded end) being that is the ground point??
I know depending on the circuit, it could actually be the other way around.
grapplesaw
Veteran and General Yakker
If you are considering any work to the existing back plain then Please have alook [ at this bulletin re upgrade pl36 series ll to full complementary set up
Last edited:
Northwinds
Veteran and General Yakker
- Joined
- Mar 18, 2013
- Messages
- 7,572
- Location
- Coventry, CT
- Tagline
- Fondler errrr... fan of all Nav's avatars
^^^^^ Ed mentioned to me that the service bulletins have lots of errors. The pictures you uploaded don't open big enough to see any detail also, they are like 2 inches big LOL
grapplesaw
Veteran and General Yakker
If you are considering any work to the existing back plain then Please have alook [ at this bulletin re upgrade pl36 series ll to full complementary set up
I hope this is better
grapplesaw
Veteran and General Yakker
grapplesaw
Veteran and General Yakker
Northwinds
Veteran and General Yakker
- Joined
- Mar 18, 2013
- Messages
- 7,572
- Location
- Coventry, CT
- Tagline
- Fondler errrr... fan of all Nav's avatars
The first one you fixed is good, this latest bunch all are tiny
grapplesaw
Veteran and General Yakker
I reloaded two of them
I have to find the other original to reload
If any one else has it please add
Here is thread on dyiaudio worth reading.
http://www.diyaudio.com/forums/soli...00b-refurb-full-complementary-conversion.html
grapplesaw
Veteran and General Yakker
You can find the image here in Przem's thread at
http://www.diyaudio.com/forums/solid-state/169883-phase-linear-700-series-ii-restoration.html
WOPL Sniffer
Veteran and General Yakker
These are already Full Comp so does that change anything???
WOPL Sniffer
Veteran and General Yakker
Did you see this question? Just wondering.
grapplesaw
Veteran and General Yakker
Yes it does, not much but a few things. If you are going to rebuild the the backplane them you may want to do this. Compare these to the ones in the series two service manual.
See this bulletin re convention
. Here is the quasi set up
grapplesaw
Veteran and General Yakker
Here are some after and before from this site.
I do not agree with some of the changes such as cutting traces on the pl36 board. Read the post #94 I thimk for his summery..
http://www.diyaudio.com/forums/soli...00b-refurb-full-complementary-conversion.html
From that post.
Here is his build
I do not agree with some of the changes such as cutting traces on the pl36 board. Read the post #94 I thimk for his summery..
http://www.diyaudio.com/forums/soli...00b-refurb-full-complementary-conversion.html
From that post.
Here is his build
Last edited:
WOPL Sniffer
Veteran and General Yakker
Very NICE. Still asking the cap question.
In Przem write up, page 8 in modifications, he suggest "Installing reservoir electrolytic caps" (4.7uf 35V) in parallel with D1 and D2). Being these are Zener diodes, is the Negative side of the cap going to attach to the anode (non banded end) being that is the ground point??
I know depending on the circuit, it could actually be the other way around.
In Przem write up, page 8 in modifications, he suggest "Installing reservoir electrolytic caps" (4.7uf 35V) in parallel with D1 and D2). Being these are Zener diodes, is the Negative side of the cap going to attach to the anode (non banded end) being that is the ground point??
I know depending on the circuit, it could actually be the other way around.
Northwinds
Veteran and General Yakker
- Joined
- Mar 18, 2013
- Messages
- 7,572
- Location
- Coventry, CT
- Tagline
- Fondler errrr... fan of all Nav's avatars
I see Navo is on, perhaps he could help with your question
grapplesaw
Veteran and General Yakker
I have not seen this done
If we do not get any other input I will email Przem and ask him for more details
Lee should have an opinion as he was part of those threads I posted links to
The cap plus should be on the banded (cathode) end of the zener diode. For the positive side regulator, this banded cathode side is the plus voltage. For the negative side regulator, this banded cathode side is attached to ground. Either way, the band is where you put the capacitor anode (positive side)
grapplesaw
Veteran and General Yakker
So while we are asking Questions
What is the reason for the change of the Dropper Resistors on Phase Linear Control Boards R1, R2 from 2.7K/5W to 7.5K/5W when changing the op amp lf356 to lf351
Both these op amps are 15 volt units and similar min max voltages?
Is the current draw less with one thus the different resistance?
Please enlighten me.
thanks
glen
What is the reason for the change of the Dropper Resistors on Phase Linear Control Boards R1, R2 from 2.7K/5W to 7.5K/5W when changing the op amp lf356 to lf351
Both these op amps are 15 volt units and similar min max voltages?
Is the current draw less with one thus the different resistance?
Please enlighten me.
thanks
glen
Lower supply current requirements for the LF351 than the original LF356 plus they originally overprovisioned the necessary supply current needs of the LF356 which resulted in PC boards that turned brown at the connection points and ruined the etch from the heat dissipated by the original dropping resistor. Common problem on that PL36 board.