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Phoenix DIY Central!
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WOPL Tips and Archive
Forum exclusively for Phase Linear and White Oak conversions, improvements, tips and other sage advice from our resident experts!
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Sticky
Parts Database
Steve K
Mar 31, 2016
7
8
9
Replies
167
Views
51,161
Dec 5, 2023
Gibsonian
Sticky
Joe's Nuggets
laatsch55
Dec 19, 2021
Replies
7
Views
1,470
Dec 19, 2021
laatsch55
Sticky
Transistor Testing Basics with Graphics... Thanks to Markthefixer and Echowars
laatsch55
Nov 27, 2021
Replies
9
Views
2,876
Dec 1, 2021
Gepetto
Sticky
Bipolar transistor grading
Gepetto
Apr 1, 2012
2
Replies
25
Views
10,040
May 11, 2021
laatsch55
Sticky
White Oak Audio Design PL14_20 Quick Test Steps - Quasi-Comp and Full-Comp
Gepetto
Dec 18, 2019
2
Replies
22
Views
10,258
Dec 27, 2019
Gepetto
Sticky
Description of latch up tendency in Phase Linear Amplifiers
Gepetto
Feb 23, 2012
Replies
11
Views
7,430
Feb 27, 2016
JustinoChiu
Sticky
Forming Phase Linear Power Supply Bulk Capacitors
Gepetto
Mar 7, 2012
Replies
17
Views
9,417
Aug 13, 2015
WOPL Sniffer
Sticky
Star Point Ground Scheme for PL700B Amplifiers
Gepetto
Mar 16, 2013
2
Replies
22
Views
6,923
Jun 14, 2014
marcok
Sticky
Debugging the Original Phase Linear PL14a/b PCBA
Gepetto
Jun 7, 2014
Replies
1
Views
2,982
Jun 7, 2014
laatsch55
Sticky
The " Save Time and Trouble With These Hints and Tricks" Thread!!
Gepetto
Dec 10, 2013
2
Replies
37
Views
20,493
May 30, 2014
premiumplus
Sticky
Phase Linear Serial Numbers
laatsch55
Dec 15, 2013
Replies
10
Views
4,906
Jan 6, 2014
Northwinds
Sticky
Bias Adjustment on the White Oak Audio Design PL14_20 Board
Gepetto
Apr 12, 2012
2
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4
Replies
74
Views
21,161
Jun 12, 2012
laatsch55
Sticky
What are the output driver emitter resistors for?
Gepetto
Mar 22, 2012
Replies
15
Views
4,257
Mar 31, 2012
laatsch55
J
WOPL PL14-20 Rev E and PL 400 Series II
Jer Jer KK6AC
Mar 13, 2025
Replies
1
Views
421
Mar 13, 2025
Jer Jer KK6AC
M
AC Thermal Switch Modifications ?
Mohawk
Jan 22, 2024
Replies
13
Views
2,933
Mar 11, 2024
mlucitt
R
Help troubleshooting WOPL 400
rosseau
Feb 15, 2024
Replies
12
Views
1,935
Feb 21, 2024
laatsch55
G
Power transistor help
gary33030
Dec 10, 2022
8
9
10
Replies
195
Views
23,443
Feb 6, 2024
gene french
Goldpoint Stepped Attenuators
mlucitt
Dec 31, 2023
2
Replies
29
Views
4,182
Jan 6, 2024
laatsch55
I just purchased a PL 400 Series 2 amp but have 85 volts AC on output with no input
Dr12volt
Feb 28, 2023
Replies
18
Views
2,296
Mar 16, 2023
Dr12volt
Phase Linear 400 series 2 potentiometers
Dr12volt
Jan 28, 2023
Replies
4
Views
989
Jan 28, 2023
Gepetto
M
Specifications
Mike Brosmore
Oct 28, 2022
Replies
13
Views
2,115
Oct 31, 2022
J!m
PL-400, Q8 and Q9
AvSat44
Jan 11, 2022
Replies
13
Views
2,577
Jun 5, 2022
laatsch55
Phase Linear 700 Series II Clair Bros Serial Numbers
laatsch55
Jun 20, 2016
2
3
4
Replies
64
Views
19,522
Mar 18, 2022
Randall Daniels
J
Early, Clean PL 400 - S/N 942-166
jimcomly
Jan 28, 2022
Replies
5
Views
1,339
Feb 5, 2022
Northwinds
J
Sick Clair 700 Series II
jimcomly
Jan 23, 2022
2
3
Replies
44
Views
6,625
Jan 28, 2022
jimcomly
P
New to me PL400 - how to start up?
Philos70
Dec 31, 2021
Replies
4
Views
1,283
Jan 3, 2022
FredR
R
I found a PL400II while starting to pack to move. Need a faceplate, anyone have something?
RobertB
Aug 4, 2019
Replies
10
Views
2,596
Oct 9, 2021
master
PL700 Series II Lessons Learned
mlucitt
Aug 2, 2020
2
Replies
35
Views
6,820
Sep 12, 2021
J!m
Phase Linear Newbie
kwingylee
Sep 8, 2021
2
Replies
29
Views
5,644
Sep 9, 2021
George S.
C
WOA PL400 output
calman46
Jul 23, 2021
Replies
6
Views
1,765
Jul 23, 2021
laatsch55
R
Wopl 700 series 2 with a slight buzz at midrange speakers
Rickyboy
Jul 6, 2021
2
Replies
26
Views
5,646
Jul 10, 2021
Gepetto
Early 400
wattsabundant
Jun 22, 2021
Replies
4
Views
1,452
Jun 23, 2021
wattsabundant
It Can Happen To You
mlucitt
Jun 6, 2021
Replies
16
Views
1,950
Jun 7, 2021
Mohawk
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