FS: Mini headamp/preamp/buffer boards

theAnonymous1 · 15th November 2008, 05:30 PM

I made a batch of small boards for use as either a headphone amp or preamp/buffer and I have some extra I would like to sell. They are 1"x1" 2oz FR4.

One of the boards is already built as a headphone amp using the AD8397. The circuit is non-inverting with a gain of ~5. Input impedance is 100k and there is a 10R output resister in the feedback loop. This is a DC coupled circuit, bandwidth limited to ~150kHz. It requires a power supply of +/-1.5VDC to +/-12.6VDC.

The other three boards can be made into any of the above choices on request. Below is a list of the IC's I have on hand that you can choose from, and how many of the boards I can make with each.

AD8397 (1)
AD8599 (3)
LM4562MA (3)
LME49860MA (3)
OPA2132U (3)
OPA2134UA (3)
THS4132 (3)

Gains, input impedance, output impedance, cap voltage, etc. are limited to parts on hand. I only have 16V Panasonic FC caps on hand right now, so if you would like to use a supply voltage higher than a 16V cap can handle, then you would need to wait until I can get some 25V caps.

Price is $10 per board, that includes shipping(US and CA) and fees. Paypal only.

loke · 26th November 2008, 12:39 AM

hi
are these still available?
Does $10 include the op-amp and shipping to Norway?
Regards

15th November 2008, 05:30 PM	#1
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	FS: Mini headamp/preamp/buffer boards I made a batch of small boards for use as either a headphone amp or preamp/buffer and I have some extra I would like to sell. They are 1"x1" 2oz FR4. One of the boards is already built as a headphone amp using the AD8397. The circuit is non-inverting with a gain of ~5. Input impedance is 100k and there is a 10R output resister in the feedback loop. This is a DC coupled circuit, bandwidth limited to ~150kHz. It requires a power supply of +/-1.5VDC to +/-12.6VDC. The other three boards can be made into any of the above choices on request. Below is a list of the IC's I have on hand that you can choose from, and how many of the boards I can make with each. AD8397 (1) AD8599 (3) LM4562MA (3) LME49860MA (3) OPA2132U (3) OPA2134UA (3) THS4132 (3) Gains, input impedance, output impedance, cap voltage, etc. are limited to parts on hand. I only have 16V Panasonic FC caps on hand right now, so if you would like to use a supply voltage higher than a 16V cap can handle, then you would need to wait until I can get some 25V caps. Price is $10 per board, that includes shipping(US and CA) and fees. Paypal only. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Discrete buffered portable mini headamp, for Lansing DN1	cetoole	Chip Amps	3	3rd August 2006 04:39 AM
AD8610 and HA5002 Buffer/HeadAmp	abid_rehan	Chip Amps	8	28th January 2006 12:20 PM
mini headamp pics	digi01	Chip Amps	16	3rd May 2004 08:54 AM
Mini Zen headamp problem, Help.	jtfoo	Pass Labs	4	3rd April 2004 03:21 AM
MY GC preamp/headamp <pic>	digi01	Chip Amps	8	17th July 2003 09:37 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

26th November 2008, 12:39 AM	#2
loke diyAudio Member Join Date: Oct 2004	hi are these still available? Does $10 include the op-amp and shipping to Norway? Regards

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)