B4
Perfect for my Lowther DX4 as well. I would not mind seeing this one soon. Replace my DCX2496 and get rid of Dick O's notch filter in one box. I am sure it will have better bandwidth.
If NP wants me to tell him how a prototype compares, I am more than willing to help test pre-production units....
neutrino_th said: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.
Perfect for my Lowther DX4 as well. I would not mind seeing this one soon. Replace my DCX2496 and get rid of Dick O's notch filter in one box. I am sure it will have better bandwidth.
If NP wants me to tell him how a prototype compares, I am more than willing to help test pre-production units....
tms0425 said:
NP recommended the rez in parallel as the 3W flavor are less expensive.
The 10R resistors are probably 1W.
As I said before, I have a bunch of Caddock 35W TO-220 resistors from another project -- they have to be heat-sinked. There's no point in letting them collect dust.
I believe that Caddock also make a TO-126 version with 15W dissipation.
Anyone who wants a ZIP file of the copper top, copper bottom, silk, bom and drill files for the input compensated PM me. I changed the hole-sizes to 150mils to accomodate a threaded 6-32 standoff. (FWIW, I use nylon standoffs so I don't have to worry about the metal coming into contact with a trace.
You can easily take the gerber files, load them into a viewer like Pentalogix and print at 100% to make your own photo-masks.
You can easily take the gerber files, load them into a viewer like Pentalogix and print at 100% to make your own photo-masks.
Re: B4
Several units are being prepped to go out to the "trade" in 1 to 2
weeks. After those are evaluated, design revs.
mithomas said:If NP wants me to tell him how a prototype compares, I am more than willing to help test pre-production units....
Several units are being prepped to go out to the "trade" in 1 to 2
weeks. After those are evaluated, design revs.
Re: Re: B4
😎
All I have to trade right now is some japanese maples and heatsinks.
I must be happy with what I got. Stop wanting stuff. Be more like the Dharma.
Nelson Pass said:
😎
All I have to trade right now is some japanese maples and heatsinks.
I must be happy with what I got. Stop wanting stuff. Be more like the Dharma.
Will the F5 work as well driving 16 ohm speakers as it does 8 ohm ones?
Are there ways to optimize it to drive the higher load?
Are there ways to optimize it to drive the higher load?
steve jones said:
Higher Z load wants more voltage and needs less current - keep power dissipation the same and don't forget to cascode the JFETs
😉
http://www.audioprojekte.de/html/semiconductors.html
Deutsch shop, "We match all transistors to your needs"
You can use 2SK170 and 2SJ74.
Deutsch shop, "We match all transistors to your needs"
You can use 2SK170 and 2SJ74.
that is good site. thanks a lot. I didn't know this site. I will save it in my bookmark. now, I can think about building a F5 too
I got my matched JFETs (2SK170BL and 2SJ74BL) and MOSFETs at:
http://www.tech-diy.com/hexfets.htm
Super service from Jack. Highly recommended.
http://www.tech-diy.com/hexfets.htm
Super service from Jack. Highly recommended.