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24th March 2011, 08:59 PM
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#1 |
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diyAudio Member
Join Date: Mar 2003
Location: midwest
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Comparing power supply of F-5 to F-1
Looking at the F-1 power supply schematic and noticed it was extremely similar to F-5 with one exception:
The F-5 has a run off of the power supply ground, leading to the CL-60, which then goes to chassis ground. The F-1 appears identical, except each cap bank has its own CL-60 going to ground, and they are not linked as in the F-5. Can someone explain why this is, or would either amp work either way? I'm sure there is a simple reason I just am not aware of? Russellc |
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24th March 2011, 09:06 PM
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#2 | |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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Quote:
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my Papa is smarter than your Nelson ! tnx to  clean  thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
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25th March 2011, 12:40 AM
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#4 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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osmozis will tell ya that
in F5 your nose is between two eyes in F1 there is no nose ...... and eyes are wandering around ......
__________________
my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
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25th March 2011, 12:46 AM
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#5 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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look Ma !
......... there is one channel PSU
__________________
my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
Last edited by Zen Mod; 25th March 2011 at 12:50 AM. |
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25th March 2011, 12:47 AM
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#6 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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and ........
there is other channel PSU .........
__________________
my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
Last edited by Zen Mod; 25th March 2011 at 12:51 AM. |
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25th March 2011, 12:52 AM
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#7 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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MA! look again !
........ and there is just one channel PSU !
and one leg more , pulling down ........ 
__________________
my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb
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25th March 2011, 02:17 AM
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#8 |
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diyAudio Member
Join Date: Aug 2007
Location: Sunny SC,USA 15 min south of Charlotte NC
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Oh I get it 1 Bipolar psu as opposed to 2 polar, on the lower channel if i use F1 psu board flip the polarity of the input from transformer flip my filter caps loose one thermistor tie lower + to upper -??? So i have B+ O B-
Dazed and confused , Elwood 
__________________
"when you open your mind to the imposible, soon you will find the truth...." |
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25th March 2011, 03:00 AM
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#9 |
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The one and only
Join Date: Mar 2001
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The F1 has two supply secondaries, isolated through
thermistors so as to absolutely minimize ground loops. On a good day they measure about 20 uV unweighted output noise. 
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26th March 2011, 02:43 AM
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#10 |
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diyAudio Member
Join Date: Aug 2007
Location: Sunny SC,USA 15 min south of Charlotte NC
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I probably would have figured it out when I went to tie p/s to F5 boards with their V+, GND, V-...
Or not and melted some three legged fuses. Regards, Elwood 
__________________
"when you open your mind to the imposible, soon you will find the truth...." |
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