Group buy: AF4 Board

Collecting interest

Same AF-4 board as a few years back

BobEllis

AF-4 Boards designed by Jens Rasmussen.

Single channel filter board that includes

HP/LP/BP filters 1st to 4th order
Linkwitz transform
Input buffer/Shelving filter
2 Peaking/notch filters
1 first order all pass filter
Output buffer with adjustable attenuation

One board can make a two way filter or a bandpass filter for one channel. Two needed for stereo. Three way requires 2 boards per channel, four way 3 boards per channel.

Requires +/-15V supply

Pcb $7 each at 100 Pieces total, $6 each at 150
Plus priority mail shipping. and paypal fees

I will send a filter design spreadsheet to all purchasers.

Coming soon...
Schematic
BOM
PCB layout
Home page for the project
Project thread
Group buy thread

Time line
Now	Sign up
Nov 15	Order the pcb's
Dec 30	Deliver the pcb's
date	The deal is closed and all boards are gone.

I'll appreciate if most people will use Paypal.

If you can't use Paypal for some reason there are other alternatives, please take this in private emails to me.

I will post shipping rates shortly
You can rather safely choose "regular mail" to most places in the world.

Shipping rates
No. pcb's	Weight gr	USA	Europe	The world
1	73	12	22	26
2	131	24	44	55
3	189	24	44	55
4	247	24	44	55
5	305	36	75	85
6	363	36	75	85
7	421	36	75	85
8	479	36	75	85
9	537	44	140	170
10	595	44	140	170

The ordering and payment procedure
1	Decide how many boards you want to order. Write it down on the list.
2	so I'll get your email address. Please also email me your contact info, address, phone number. Mention also if Paypal NOT is OK.
3
4	You'll pay me.
5	I'll make a note on the list that you have paid.
6	I'll send the goods, write it on the list also.
7	You make a note when you have got the pcb's.

Sign up and fill in username, country and number of pcb's but let me add with the rest. You must also send me your email address. I'll send you a Paypal invoice as soon as possible. Change only when you have received the stuff. Right now it's only an interest list with NO OBLIGATIONS.

The order list
User	Country	Got email addr.	AF-4 Board	PSU2.2 board	Amount	Invoice	Paid	Shipped	Received	N otes
sandbasser	USA	No	4	4	Amount	YYMMDD	YYMMDD	YYMMDD	YYMMDD	--
Mfly	Netherlands	No	8	0	Amount	YYMMDD	YYMM DD	YYMMDD	YYMMDD	--
Coolfox007	UK	No	6	2	Amount	YYMMDD	| YYMMDD	YYMMDD	--
Joschl	Germany	No	6	4	Amount	YYMMDD	YYMMDD	YYMMDD	YYMMDD	--
User	Country	No	Product A	Product B	Amount	YYMMDD	YYMMDD	YYMMDD	YYMMDD	--
User	Country	No	Product A	Product B	Amount	YYMMDD	YYMMDD	YYMMDD	YYMMDD	--
User	Country	No	Product A	Product B	Amount	YYMMDD	YYMMDD	YYMMDD	YYMMDD	--