F5 pcb group buy... - Page 44

androuski · 13th March 2010, 10:54 AM

Money has just been sent,
Nicolas

HaflerFreak · 24th March 2010, 06:47 AM

Boards showed up today Peter, beautiful, I'm glad I ordered another set. Thank you very much for the extra rectifier boards, they are very much appreciated!
I was going to build an F5 P2P, but these will add a very elegant touch.

Have all my parts except for heatsinks and N-channel MOSFETS.

This will be my first DIY amp - can't wait to hear this thing.

Thanks again,
Scott

All hail Nelson Pass!

androuski · 28th March 2010, 03:59 PM

I've got my package last week, with an extra : a pair of rectifier bridge ! Thanks, those pcb are tiny and beautifull !
I've found all the parts on digikey, except 2SJ108/74 and 2SK170/370...

Tea-Bag · 28th March 2010, 04:55 PM

Androuski, Member Blues has these for sale. I purchased from him last time.

Matched Toshiba FETs For Sale

androuski · 28th March 2010, 07:17 PM

Thanks !
Can you confirm that 2SJ74/108 and 2SK170/370 are the only ones that need to be matched ?

HaflerFreak · 28th March 2010, 08:26 PM

Hi Androuski,
According to the designer himself, the JFETS need not be tightly matched, but do need to be in the same grade, preferably 'BL'. Recommended IDSS for the standard circuit is about 8mA. Many members on the board DO match these devices for optimum results.
In other words: match if you can.

Personally, I got lucky and even partly decided to build an F5 because I have had 20 each 2SJ74BL/2SK170BL from ampslab.com just laying around for almost 2 years - all measured and matched.

It's sweet when you have the toughest parts to get in your parts bin!

One last note:
I have been scouring the threads for information on building an F5 with Toshiba 2SK1530/J201 outputs, one mod I have heard is using 6mA IDSS input fets rather than 8mA, any info is much appreciated, although any respondents should probably post on the F5 builders thread....

Scott

androuski · 28th March 2010, 09:45 PM

Thanks,
I'll see what I can get...

HaflerFreak · 30th March 2010, 07:45 AM

Hello,
Just a quick post to say thank you Peter, the rest of the boards arrived last Saturday. Very nice PS boards, perfect for an XL-280 as it happens.

Will post as the adventure progresses....

specialidiot · 5th April 2010, 05:23 PM

Quote:

Originally Posted by Peter Daniel

Of course there were PS boards for this one as well, but during last few months all have been sold out.

Hi, I am in the process of building this board, having already built the cviller versions.

I notice that the power supply PCB does not have provision for R9 and R10 as shown on the schematic found in Nelson Pass' service manual for the F5. If I remember correctly the value is 2.2k 3w.

Are they not required, or added elsewhere?

Peter Daniel · 5th April 2010, 09:25 PM

Those resistors are not really necessary, if you want to ad them, they can be solder directly to the pads.

28th March 2010, 04:55 PM	#434
Tea-Bag not politcally affiliated diyAudio Member Join Date: Feb 2006 Location: Kennebunk Blog Entries: 11	Androuski, Member Blues has these for sale. I purchased from him last time. Matched Toshiba FETs For Sale __________________ SemiSouth R085/R100A JFET available now DCB1/BiB #3 on order : SSHV2 Sign up Sheet/Payup Sheet Ends 2-26-2012 CLICK HERE

5th April 2010, 09:25 PM	#440
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Those resistors are not really necessary, if you want to ad them, they can be solder directly to the pads. __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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
F3 pcb group buy...	h_a	Group Buys	253	23rd December 2008 01:40 PM
new to group	Lemalin22	Introductions	3	22nd June 2007 02:22 AM
What a group!	EvilGenius	Introductions	6	25th May 2006 06:16 PM
ono group buy	xsnailx	Pass Labs	106	14th March 2004 02:24 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

13th March 2010, 10:54 AM	#431
androuski diyAudio Member Join Date: Jan 2008	Money has just been sent, Nicolas

24th March 2010, 06:47 AM	#432
HaflerFreak diyAudio Member Join Date: Jun 2007 Location: Westmont, IL	Boards showed up today Peter, beautiful, I'm glad I ordered another set. Thank you very much for the extra rectifier boards, they are very much appreciated! I was going to build an F5 P2P, but these will add a very elegant touch. Have all my parts except for heatsinks and N-channel MOSFETS. This will be my first DIY amp - can't wait to hear this thing. Thanks again, Scott All hail Nelson Pass!

28th March 2010, 03:59 PM	#433
androuski diyAudio Member Join Date: Jan 2008	I've got my package last week, with an extra : a pair of rectifier bridge ! Thanks, those pcb are tiny and beautifull ! I've found all the parts on digikey, except 2SJ108/74 and 2SK170/370...

28th March 2010, 07:17 PM	#435
androuski diyAudio Member Join Date: Jan 2008	Thanks ! Can you confirm that 2SJ74/108 and 2SK170/370 are the only ones that need to be matched ?

28th March 2010, 08:26 PM	#436
HaflerFreak diyAudio Member Join Date: Jun 2007 Location: Westmont, IL	Hi Androuski, According to the designer himself, the JFETS need not be tightly matched, but do need to be in the same grade, preferably 'BL'. Recommended IDSS for the standard circuit is about 8mA. Many members on the board DO match these devices for optimum results. In other words: match if you can. Personally, I got lucky and even partly decided to build an F5 because I have had 20 each 2SJ74BL/2SK170BL from ampslab.com just laying around for almost 2 years - all measured and matched. It's sweet when you have the toughest parts to get in your parts bin! One last note: I have been scouring the threads for information on building an F5 with Toshiba 2SK1530/J201 outputs, one mod I have heard is using 6mA IDSS input fets rather than 8mA, any info is much appreciated, although any respondents should probably post on the F5 builders thread.... Scott

28th March 2010, 09:45 PM	#437
androuski diyAudio Member Join Date: Jan 2008	Thanks, I'll see what I can get...

30th March 2010, 07:45 AM	#438
HaflerFreak diyAudio Member Join Date: Jun 2007 Location: Westmont, IL	Hello, Just a quick post to say thank you Peter, the rest of the boards arrived last Saturday. Very nice PS boards, perfect for an XL-280 as it happens. Will post as the adventure progresses....

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