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Old 7th February 2013, 10:08 PM   #3661
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No. Like so many, I think i wore out my welcome with him, being a neurotic pest. Understandable, though. Just ask ZM
I am about to start on Altec combo. 416 down low. 288 in Iwata, and somthing up top. Havent decided about that yet.
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Old 8th February 2013, 12:01 AM   #3662
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use something

at least

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Old 8th February 2013, 12:12 AM   #3663
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Enjoy weekend. Dont work it away.
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Old 8th February 2013, 12:14 AM   #3664
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I would say that a 15" JBL crossed to a SEOS-18 around 700-800 Hz is the sweet spot, if you don't want a midbass horn. Driven by an M2, F6, or SIT would be heavenly.
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Old 8th February 2013, 12:22 AM   #3665
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THere are folks in both camps, from what I understand. JBL tends to like higher power amps to sound best, where as Altec, with lightweight cones and lower power handling like FW style amps. I don't dispute your thoughts. Too new to do that. Just relaying what I have heard. Pop over to Horn/TL combo to discuss. I would thoroughly enjoy the company. I have JBL LE15 and have been watching for 2235, which is considerd king, by many.
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Old 8th February 2013, 03:11 AM   #3666
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That's kinda right buzz. There seems to be this thing where they (I use 2226) get better with a little more power (I"M more the R&R'er type). But they really are great low distortion drivers if your pushin a little
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Old 9th February 2013, 11:42 PM   #3667
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I was staring at the schematics today trying to decide how I will proceed with this after receiving Mike's pcbs.
One thing that I was thinking was where to get the 2sj74 and then it kind of occurred to me that perhaps we could use a 2SK170 in a DCB1 kinda way?
That would perhaps offer better symmetry in the buffer section and would also be in the spirit of F6 part of which is not using complementary parts
Not to mention one less semi-dodo to worry about
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Old 9th February 2013, 11:50 PM   #3668
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My understanding is that the Linear Systems J74 replacement is no longer vaporware, and might be available for sale in the next few months.

But a non-complementary solution is very intriguing...
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Old 10th February 2013, 12:07 AM   #3669
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Quote:
Originally Posted by dimkasta View Post
I was staring at the schematics today trying to decide how I will proceed with this after receiving Mike's pcbs.
One thing that I was thinking was where to get the 2sj74 and then it kind of occurred to me that perhaps we could use a 2SK170 in a DCB1 kinda way?
......)
certainly yes

Quote:
Originally Posted by dimkasta View Post
.......
That would perhaps offer better symmetry .......

not certainly


Quote:
Originally Posted by dimkasta View Post
....... be in the spirit of F6 part of which is not using complementary parts
.........
certainly yes

Quote:
Originally Posted by dimkasta View Post
.........
Not to mention one less semi-dodo to worry about
certainly yes


but - do not forget that same sex Jfet buffer is having sort of double output impedance , comparing to complementary version


why not double Jfets in it ?

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Old 10th February 2013, 12:32 AM   #3670
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Quote:
Originally Posted by Zen Mod View Post
why not double Jfets in it ?

So instead of using the - side just add a parallel 2SK170 to the + side ?
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