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Old 3rd January 2020, 06:18 PM   #6691
angrypat is offline angrypat  United States
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And of course I will have to tap Dave at planet10 to see what he has in the works!


Also, I would really rather not use any subwoofer(s).
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Old 3rd January 2020, 06:27 PM   #6692
angrypat is offline angrypat  United States
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Crossrh post #283 recently had a pic up with a pair in the back ground, He's very happy with them, has them on a big ab class amp I think. They were beauties in a red enamel "milk" paint.


TB new line of Coax FR drivers
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Old 3rd January 2020, 07:17 PM   #6693
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally Posted by laverda View Post
Hi All

Pre-xmas lunch question, I have jfets J74B (10.8) & K170B (9.0) (purchased from the store at different times) but are they close enough as a pair for my F6 build?? I know jim said dont sweat over matching (10%) is close enough, these are just outside that. ?? I'm reluctant to shell out another $75 + by the time there landed in the UK.

TIA, have a good day ya'll

Kind regards from the UK
just introduce source resistors to equalize currents an bring dissipatio down
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Old 3rd January 2020, 08:04 PM   #6694
poseidonsvoice is offline poseidonsvoice  United States
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angrypat,

The Faital 3WC looks nice, and I am a big fan of well designed high efficiency drivers from BMS, B&C, Faital Pro, etc...they have quality control and engineering down to a science. The amount of testing they do is astonishing since they have to answer to a MUCH bigger and critical audience, the Pro guys particularly studios and stadiums. Designing for hifi honestly, is chump change.

Best of luck!

Anand.
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Old 4th January 2020, 02:24 PM   #6695
2 picoDumbs is offline 2 picoDumbs  Australia
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Originally Posted by Zen Mod View Post
just introduce source resistors to equalize currents an bring dissipatio down
Kind of starts to ruin the output impedance of the jet buffet which is important for driving the Jensen transformer.
I guess it depends how much money the guy has to devote to this hobby.
I think that if he plans to live with this amplifier for more than a year, it’s worthwhile just purchasing more suitable jet pairs.
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Old 4th January 2020, 03:29 PM   #6696
Zen Mod is offline Zen Mod  Serbia
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I would rather choose JFet pairs

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Old 4th January 2020, 03:46 PM   #6697
angrypat is offline angrypat  United States
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pairs of jets would be very expensive!
Private Jet Learjet for Sale - Globalair.com
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Old 4th January 2020, 03:53 PM   #6698
angrypat is offline angrypat  United States
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Thankyou for the replies 6L6 and poseidonsvoice. I was hoping that the sb12.3 from zaph would be good fit power wise, as it is sealed, where most other designs are rear vented which makes placement more finicky (these look like the winners so far). Those faitals do look good though. I'm still left with the question of speaker sensitivity for pairing with the F6, is it the big power supply that makes the most difference?
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Old 4th January 2020, 03:57 PM   #6699
6L6 is offline 6L6  United States
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Angrypat - acquisition cost is the cheap part of private aviation...


Re: power supply, there is essentially no difference in over sizing it vs. making it as shown on the original schematic. You want more power, make a bigger amp. You’ll be surprised, however, just how much 25A of real Class-A actually is.

Last edited by 6L6; 4th January 2020 at 04:02 PM.
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Old 4th January 2020, 05:23 PM   #6700
angrypat is offline angrypat  United States
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6L6 - I suppose aviation and boats share that trait.



I am surprised at how strong it is, the F6 is a beast. I have a Rotel receiver rated at 100w, and the F6 goes louder and keeps it's composure. I also have a Emotiva Mini x a100, rated 50w @8r, it can't even stand next to F6 power wise (or sound wise of course). I have an old Nakamichi TA-2, it also seems stronger than it's numbers would suggest, (bought it new when I was 17, still have the working remote too!) no competition for the F6.

Last edited by angrypat; 4th January 2020 at 05:25 PM.
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