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Old 11th September 2009, 08:41 PM   #31
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Default Finally!

I think I have it working! Got .60 across R12 and .078 DC at the output.
Approximately the same on both channel.

For a second I thought I let out the smoke out of this build!! It was just the alligator clip rubber jacket that got too close to a 3w resistor!!

This build was done on Peter Daniel's F5 amp board.

Won't check this one off as done until I hear some music out of it.

Thanks everyone.
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Last edited by vdi_nenna; 11th September 2009 at 08:47 PM.
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Old 12th September 2009, 12:06 AM   #32
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mmmm, and I think you will find that the efforts you put in will be well worth it. Very fine amp indeed.


Fran
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Old 12th September 2009, 12:48 AM   #33
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Default Pics

Quote:
you will find that the efforts you put in will be well worth it. Very fine amp indeed.
I agree.

Some Pics...

http://i145.photobucket.com/albums/r...s/F5_1_Fin.jpg

http://i145.photobucket.com/albums/r...s/F5_2_Fin.jpg

http://i145.photobucket.com/albums/r...s/F5_4_Fin.jpg
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Old 14th September 2009, 08:35 PM   #34
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Default F5 Problems

Thanks Tea-Bag and Vdi-Nenna. I have been through two PD amp boards and not able to get past the very first testing step with a veriac. And the reason...there may be others, that's for sure...is I did exactly what vdi-Nenna did. Swapping the output transistors. Thanks

Jan
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Old 14th September 2009, 09:07 PM   #35
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Quote:
I did exactly what vdi-Nenna did. Swapping the output transistors.
The first build is still a mystery. The build that worked was a different set of amp boards. Once I understood what was correct (schem or article) I saw that I had the FETs correctly installed.

Increasing the 2.2k resistors didn't help either.

I'm listening to the F5 and B1 right now. It's hard to describe. I can say nothing seems hidden. I've actually heard a few songs where before the lyrics were indistinguishable. Not anymore. It's like untying a musical knot.



V~
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Old 14th September 2009, 09:36 PM   #36
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Default F5

Hi

I can't wait to get home to see if I can get this up and going. I got a hold of PD's gainclone kit after two tries on the F5. My hope to was to have the B1 and F5 drive my KJKing open baffles. With and Adom 555 2 and the B1, I am hearing somthing like what you are describing. I hope the F5 takes to that level. Thanks

Jan
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Old 14th September 2009, 10:02 PM   #37
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Right now I am running F5 on top, F5 on bottom, with Open Baffles.

Lowther on top, 2 EM Alpha 15A's on bottom like mjk stuff.

I also put T-bass on the bottom end, and this brought down extension real well.
Sound is pretty pinpoint on the F5s even on the low end. Good times!
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Old 14th September 2009, 10:15 PM   #38
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The full-range drivers are starting to interest me. They make so much sense. Haven't built one yet. Any recommendations for starters?
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Old 14th September 2009, 11:00 PM   #39
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[QUOTE=Tea-Bag;1923717]Lowther on top, 2 EM Alpha 15A's on bottom like mjk stuff.

I use the same 15 in woofers and only drem of Lowther. I have 6.5 inch Fostex 166esr for the high end. It is better than the 103's that MJK used first. Which lowther are you using? Like MJK?

Jan
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Old 15th September 2009, 02:13 AM   #40
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I have DX4 lowthers with a notch filter on them. I have had them for some time. I have not heard the fostex speakers.

I hear the PM6A is not quite as detailed, but very magical and doesn't need as much or no filtering in OB.

There seems to be lots of options now for full range drivers. I am not the right person to ask.
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