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Old 25th January 2013, 01:03 AM   #12851
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Thats cause I got em
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Old 25th January 2013, 02:46 AM   #12852
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Quote:
Originally Posted by 6L6 View Post
If selecting, we should be aiming for an Idss of 8-10 or so?
Yes, but you have quite a bit of leeway.

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Old 25th January 2013, 12:39 PM   #12853
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These others are inexpensive enough that you can match P and N for Idss or gm --

I had some boards burned to allow use of the surface mount devices, or the 2N5460/2N5457 etc. which have a different pinout. You can buy 25 of the SMT like the MMBF5460/1/2 for the cost of a six pack of Bud.

Cordell shows a dual N-Channel input stage in his book, but its just not elegantly simple like the F5.
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Old 25th January 2013, 01:26 PM   #12854
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jackjinnj,
are there some quality SMD options, as I am playing with this particular genre at the moment.
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Old 25th January 2013, 01:30 PM   #12855
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Hi all.

Looking at Xs, Is there any benefit separating PSU from AMPS in F5?

How do you make a reliable connection?

Just wondering!!!

(They should look nice also)
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Old 25th January 2013, 04:19 PM   #12856
amp_guy is offline amp_guy  United States
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Thats cause I got em
I snoozed I loosed. no J174 left at Digikey or Mouser
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Old 25th January 2013, 04:27 PM   #12857
labjr is offline labjr  United States
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Mr Pass, I'm wondering if Linear Systems ever gave you a reason their parts have been delayed so long?
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Old 25th January 2013, 04:29 PM   #12858
6L6 is offline 6L6  United States
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Originally Posted by Pemo View Post
Is there any benefit separating PSU from AMPS in F5?

How do you make a reliable connection?
Are you asking about making a separate chassis for the power supply? Yes, it is a good idea.

Look for the 4-terminal "Speakon" connector from Neutrik to make the cable. Very nice!
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Old 25th January 2013, 04:32 PM   #12859
6L6 is offline 6L6  United States
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Mr Pass, I'm wondering if Linear Systems ever gave you a reason their parts have been delayed so long?
I know the answer to that, the J74, being a P-channel Jfet, is significantly harder to make than a N-channel (and more expensive), and they have been having trouble getting them to good quality.

My understanding is that they should be available soon.
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Old 25th January 2013, 04:40 PM   #12860
labjr is offline labjr  United States
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I wonder if it took Toshiba or Fairchild over five years to get good yields? Not like it's something that hasn't been done before.
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