F2

Puffin · 14th July 2009, 01:41 PM

I have bought some F2 boards in the group buy.

I want to get this amp right and use good quality and correctly rated components.

I would appreciate peoples views on which makes and type of resistors would be best suited to the F2.

Puffin · 15th July 2009, 09:39 AM

What no-one?!

FYC · 15th July 2009, 11:41 AM

I believe circuit topology comes first, so I am not keen on using exotic components in building my F2.

Resistor rating - please refer to the document in FirstWatt download. I only use industrial grade stuff. For DIYer, Digikey can be a good source.

Once you build it using standard components, I believe you got the majority of the performance level set. Playing around with components are then more of a personal taste or choice.

nigelwright7557 · 18th July 2009, 08:59 PM

Quote:

Originally posted by Puffin
I have bought some F2 boards in the group buy.

I want to get this amp right and use good quality and correctly rated components.

I would appreciate peoples views on which makes and type of resistors would be best suited to the F2.

Metal film resistors are a good start where possible.

Buy the rest from a high class distributor.

Keep away from ebay !

jupiterjune · 21st July 2009, 12:10 AM

use the vishay/dale metal film -- I think they are the type "RN".

they come in nifty hot dog brown color, so your boards will look like they are covered with tiny wienerschnitzels.

JJ

Puffin · 21st July 2009, 12:07 PM

O.K sounds like a good idea to me!

Tea-Bag · 21st July 2009, 02:43 PM

I user RN55D from mouser for most resistors. They are usually less than 10 cents USD.

If I go big bucks, I use PRD 1/4 watt for signal path, and mills for Power resistors.

I plan on Panasonic power resistors and RN55d for the F2...

toufu · 21st July 2009, 07:53 PM

By the way, what should the voltage rating be for the caps?

Tea-Bag · 21st July 2009, 08:00 PM

Quote:

Originally posted by toufu
By the way, what should the voltage rating be for the caps?

When properly loaded fromthe 24v power supply, the onboard votage of the F2 is ~20v. I think the L1 brings the V down. I would feel fairly safe with 25v ones.

toufu · 21st July 2009, 08:28 PM

Cool! Thanks!

14th July 2009, 01:41 PM	#1
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	F2 I have bought some F2 boards in the group buy. I want to get this amp right and use good quality and correctly rated components. I would appreciate peoples views on which makes and type of resistors would be best suited to the F2.

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15th July 2009, 09:39 AM	#2
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	What no-one?!

15th July 2009, 11:41 AM	#3
FYC diyAudio Member Join Date: Jan 2001 Location: Hong Kong	I believe circuit topology comes first, so I am not keen on using exotic components in building my F2. Resistor rating - please refer to the document in FirstWatt download. I only use industrial grade stuff. For DIYer, Digikey can be a good source. Once you build it using standard components, I believe you got the majority of the performance level set. Playing around with components are then more of a personal taste or choice.

21st July 2009, 12:10 AM	#5
jupiterjune diyAudio Member Join Date: Nov 2006	use the vishay/dale metal film -- I think they are the type "RN". they come in nifty hot dog brown color, so your boards will look like they are covered with tiny wienerschnitzels. JJ

21st July 2009, 12:07 PM	#6
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	O.K sounds like a good idea to me!

21st July 2009, 02:43 PM	#7
Tea-Bag not politcally affiliated diyAudio Member Join Date: Feb 2006 Location: Kennebunk Blog Entries: 7	I user RN55D from mouser for most resistors. They are usually less than 10 cents USD. If I go big bucks, I use PRD 1/4 watt for signal path, and mills for Power resistors. I plan on Panasonic power resistors and RN55d for the F2...

21st July 2009, 07:53 PM	#8
toufu diyAudio Member Join Date: Jun 2008 Location: San Francisco	By the way, what should the voltage rating be for the caps?

21st July 2009, 08:28 PM	#10
toufu diyAudio Member Join Date: Jun 2008 Location: San Francisco	Cool! Thanks!