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Old 28th November 2012, 03:25 AM   #61
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i can't get those expensive prices eigther. i get my heatsinks cut for free
and thats 6pc 12" cut down to 6"
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Old 29th November 2012, 01:56 AM   #62
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I live about 50 miles from the nearest machine shop, buy the time I factor in gas prices to and from plus labor I get this $$$$. I just ordered this table-saw blade > Oshlun #SBNF-100100 , It is a 100 tooth TCG made just for Aluminum ! I hope it cuts clean with-out to much De-burring needed. Also the blade may pay for it-self over time, and still is cheaper than going to the machine shop. Could someone recommend a good cutting oil to use with it ? Thanks

Last edited by thor61; 29th November 2012 at 02:07 AM.
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Old 29th November 2012, 02:27 AM   #63
N Brock is offline N Brock  United States
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Originally Posted by thor61 View Post
Could someone recommend a good cutting oil to use with it ?
Lenox lube tube. It's waxy and sticks to your metal or blade, keeps oil from spraying all over.
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Old 29th November 2012, 11:58 PM   #64
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Thank-you everyone for all your help thus far. Hope to start building soon.
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Old 21st March 2013, 03:40 PM   #65
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Default Sorry to bump an old tread, but...

Did boards for this amp ever get created? A they still available?

If yes, a link to them would be great!

Thanks in advance.
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Old 21st March 2013, 08:28 PM   #66
lhquam is offline lhquam  United States
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Originally Posted by bigbargain View Post
Did boards for this amp ever get created? A they still available?

If yes, a link to them would be great!

Thanks in advance.
Yes I had a few F5TBS-v.1.1 boards built. The image below shows the artwork. The board has numerous options:
  • One Balanced F5 (with or without turbo diodes)
  • A pair of unbalanced F5 channels (with or without turbo diodes)
  • A single unbalanced F5 channel with 2 MOSFETS per rail(with or without turbo diodes)
I also had several F5XBS v1.0 (non-turbo) boards build. My everyday amplifier consists of a pair of balanced F5 boards using this board as shown in post 1-8 of this thread.
Attached Images
File Type: jpg F5TBS-proto-v.1.1.jpg (259.9 KB, 360 views)
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Old 21st March 2013, 08:48 PM   #67
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Default Very Sorry. I got my question wrong...

I want to buy boards. Do I need to have them made or how do I get some?
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Old 21st March 2013, 11:56 PM   #68
lhquam is offline lhquam  United States
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I want to buy boards. Do I need to have them made or how do I get some?
Check your private mail.
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Old 10th April 2013, 05:16 AM   #69
The Dastardly Dad of Three
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lhquam, did you ever manage to get round to doing the measurements using 2sk1530 in this setup compared to the FQA/FQPs ?
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Old 10th April 2013, 05:51 AM   #70
lhquam is offline lhquam  United States
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Originally Posted by kasey197 View Post
lhquam, did you ever manage to get round to doing the measurements using 2sk1530 in this setup compared to the FQA/FQPs ?
I have built channels with FQA28N15/FQA36P15 MOSFETs and with FQP19N20C/FQP12P20 MOSFETs. I never did any tests with 2SK1530/2SJ201, but based on my experience with an unbalanced F5, they should be very good.

One thing to consider about the balanced F5. It is not necessary that the NMOS FETSs be well matched to the PMOS FETs, but the FETs and drivers of the same polarity need to be matched to each other.

Of course Papa's P3 adjustment allows the nulling of the 2nd harmonic in the F5 without the need for FET matching.
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