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Old 9th May 2011, 07:11 PM   #11
Itsmee is offline Itsmee  England
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Most excellent 6L6
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Old 9th May 2011, 07:15 PM   #12
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Glad you posted this, the resistor that is parallel to the pot is confusing me. I have heard several who are using the Toshiba mosfets were having to modify the resistor, but I thought they lowered the resistor to 1.5 or so. Obviously, this is not the case in your build, clear enough.

What output mosfets did you use, and does anyone else have anything to add concerning modifying these resistors? My current build, (F-5 #2,) is using the Toshiba output mosfets. One fellow builder had his fire up fine with standard parts, others seem to have to modify....Any words from anyone on their resistor modification/alteration on their builds?

Russellc
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Old 9th May 2011, 11:16 PM   #13
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Default popping fuses

Ok, I've figured out what is happening. I must have been looking at the f5 service guide when I put together the PSU board. CViller's power supply boards labels are not in sync with that schematic.

So the correct value should be 2.2k ohm across the input of (T1 & T2) & (T3 + T4) and not .47kohms.

That's what has been popping my fuse. Silly me. I'll have to swap them around.

I've measured about ~15v dc & ~ 19v dc from the outputs of the bridges. Does that sound about right?
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Old 10th May 2011, 12:01 AM   #14
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I want to thank 6L6 for his great spirit and positive enthusiasm

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Old 10th May 2011, 01:32 AM   #15
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Phenomenal!! Nice and clean, superb attention to detail...I mean completely fugly
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Old 10th May 2011, 01:51 AM   #16
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Default Best to keep this build thread "hijack free"....

6L6.... Jim.... Clear, concise, succinct of your F5 build. Great pics, too. Hopefully, no one will hijack your thread! (Can you get it "locked up"?)

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Originally Posted by merlin2069er View Post
Ok, I've figured out what is happening. I must have been looking at the f5 service guide when I put together the PSU board. CViller's power supply boards labels are not in sync with that schematic.

So the correct value should be 2.2k ohm across the input of (T1 & T2) & (T3 + T4) and not .47kohms.

That's what has been popping my fuse. Silly me. I'll have to swap them around.

I've measured about ~15v dc & ~ 19v dc from the outputs of the bridges. Does that sound about right?
Ooohhhh, Merlin--congrats on being the first and quickest to hijack this fine thread. Perhaps you ought to consider posting your own thread, on your build and problems. And yeah....the 2.2k ohm resistor is a BLEEDER resistor (there for your safety). In any case, where did you find a requirement for .47kohm (470 ohm) resistors in the power supply? They are not part of the design.... (If you want to answer, best to do in a new thread, or one of your existing ones).
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Old 10th May 2011, 02:22 AM   #17
6L6 is offline 6L6  United States
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Quote:
Originally Posted by CanAmMan
Hopefully, no one will hijack your thread! (Can you get it "locked up"?)
It doesn't matter. All the photos are in the top posts. What happens past that is gravy.
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Old 10th May 2011, 04:27 AM   #18
ra7 is offline ra7  United States
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That was breathtaking! Excellent. Yup, whatever now is immaterial.
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Old 10th May 2011, 07:49 AM   #19
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question to users familiar with Hi-Fi 2000 boxes and Fischer Heatsink

are Hi-Fi 2000 using Fischer heatsinks - pics are like SK56 heatsinks
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Old 10th May 2011, 12:59 PM   #20
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Congratulations !!! Very nice amp!
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