F5 power amplifier - Page 112

jacco vermeulen · 10th June 2008, 07:17 AM

Cool, there's a DIY-Girl F5 builder on the Thai list.

(makes me wonder if there's an ex-Threshold JP lady soldering on the kitchen effort when the Master is having one of his Cali Cabernet hangovers again)

jackinnj · 10th June 2008, 12:44 PM

Here's a modification -- I put in 2 vias on each resistor lead -- 75 mil diameter, 39 mil drill, spaced 600 mils.

tms0425 · 10th June 2008, 12:48 PM

Thanks Jack!

neutrino_th · 10th June 2008, 02:21 PM

Hi

"Yes. The B1 is scheduled beginning of July."

Anybody can tell me more about this new project? I'm impatient...

danny_66 · 10th June 2008, 02:26 PM

http://www.firstwatt.com/watts_new.htm

Zen Mod · 10th June 2008, 02:28 PM

Quote:

Originally posted by neutrino_th
Hi

"Yes. The B1 is scheduled beginning of July."

Anybody can tell me more about this new project? I'm impatient...

naah .......

just a fancy hair - dryer ..............

just go and buy cheap chinese one ......... it's cheaper and hotter ......

stefanobilliani · 10th June 2008, 02:35 PM

Quote:

Originally posted by danny_66
http://www.firstwatt.com/watts_new.htm

WOW

Tea-Bag · 10th June 2008, 03:02 PM

Quote:

Originally posted by tms0425
The Mills 5w is 0.17" dia x 0.562" body, 0.032" lead dia.
Mills 5w from PartsConnexion

I didn't compute it but assume a single 5w 100r would be enough(?)

Parallel 100ohms = one 50 ohms. Buy a mills 50ohms. (actually four for two channels)

neutrino_th · 10th June 2008, 03:10 PM

Thanks danny_66.

"The B4 Crossover / Equalizer has been designed around the needs of full range speakers (Lowther, Fostex, and all the newer entries). It has circuitry for equalizing to the needs of full range drivers and for adding a woofer."

perfect for my Fe206.

tms0425 · 10th June 2008, 03:18 PM

Quote:

Originally posted by mithomas

Parallel 100ohms = one 50 ohms. Buy a mills 50ohms. (actually four for two channels)

Of course, but I just wanted to make sure you don't need that much dissapation for some reason not obvious to my tiny brain. Since it is just feedback I doubt it. Likely the 100r 3w are just what Nelson had a lot of so there are two ;-)

10th June 2008, 07:17 AM	#1111
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	Cool, there's a DIY-Girl F5 builder on the Thai list. (makes me wonder if there's an ex-Threshold JP lady soldering on the kitchen effort when the Master is having one of his Cali Cabernet hangovers again) __________________ Not so much,.......if it says "ZM" in the corner.

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10th June 2008, 12:44 PM	#1112
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Here's a modification -- I put in 2 vias on each resistor lead -- 75 mil diameter, 39 mil drill, spaced 600 mils.

10th June 2008, 12:48 PM	#1113
tms0425 diyAudio Member Join Date: Oct 2006 Location: Ft. Wayne, IN	Thanks Jack!

10th June 2008, 02:21 PM	#1114
neutrino_th diyAudio Member Join Date: Apr 2008	Hi "Yes. The B1 is scheduled beginning of July." Anybody can tell me more about this new project? I'm impatient...

10th June 2008, 02:26 PM	#1115
danny_66 diyAudio Member Join Date: Jun 2005 Location: Lierde	http://www.firstwatt.com/watts_new.htm

10th June 2008, 03:10 PM	#1119
neutrino_th diyAudio Member Join Date: Apr 2008	Thanks danny_66. "The B4 Crossover / Equalizer has been designed around the needs of full range speakers (Lowther, Fostex, and all the newer entries). It has circuitry for equalizing to the needs of full range drivers and for adding a woofer." perfect for my Fe206.