Simple se parts, all needed?

newtube · 8th April 2009, 07:19 PM

Guys, i'm building one of George's simple se amps and i was wondering if you can tell me what purpose the FREDS and CCS with heatsinks serve? can they be replaced with anything else?

I'm having trouble sourcing them here in the uk.

Thanks,
Darran.

rknize · 8th April 2009, 09:07 PM

The FREDs are not used until the tube rectifier bypass is shorted. If you plan on only using the GZ34 rectifier, you can omit them.

The CCSs are used as plate loads for the input stage to get as much gain as possible out of them. If you can find an equivalent part (high voltage), you should be able to substitute it with the corresponding modifications. I imagine you could also use resistors instead and sacrifice some gain. Not sure what that would sound like.

Russ

chrish · 9th April 2009, 03:45 AM

Order the CCS from DigiKey online.

dubdub · 9th April 2009, 10:14 PM

Hi- I would omit the ss rectifiers, these parts are proving to be unreliable and will soon be replaced on tubelab website with an alternative

newtube · 14th April 2009, 09:03 PM

Hi guys, i just want to check something with you boys. . .

I am only using tube rectification so i can do without the freds and i don't need to put anything in their place?

Now, what can i use instead of the ccs and heatsinks? i don't want to deal with digikey as they have messed me around big time, so what are my options fella's?

This is the only thing stopping me from finishing the amp.
Thanks again,
Darran.

Ty_Bower · 14th April 2009, 09:26 PM

Try these part numbers from Mouser:

747-IXCP10M45S
532-530714B00
532-4880SG

8th April 2009, 07:19 PM	#1
newtube diyAudio Member Join Date: Mar 2009	Simple se parts, all needed? Guys, i'm building one of George's simple se amps and i was wondering if you can tell me what purpose the FREDS and CCS with heatsinks serve? can they be replaced with anything else? I'm having trouble sourcing them here in the uk. Thanks, Darran.

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
Simple amp from used parts	Domkuip	Solid State	2	23rd October 2008 10:24 AM
Simple pre-amp schematic needed	imperfectcircle	Solid State	12	23rd February 2007 01:49 AM
simple shematique needed	bosse	Solid State	8	12th April 2006 09:33 AM
Simple 6L6 PP Guitar Design Needed	Trout	Tubes / Valves	1	7th September 2005 03:20 AM
KEF parts needed	Armadel	Multi-Way	0	11th January 2002 08:16 PM

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

8th April 2009, 09:07 PM	#2
rknize diyAudio Member Join Date: Feb 2009 Location: Chicagoland	The FREDs are not used until the tube rectifier bypass is shorted. If you plan on only using the GZ34 rectifier, you can omit them. The CCSs are used as plate loads for the input stage to get as much gain as possible out of them. If you can find an equivalent part (high voltage), you should be able to substitute it with the corresponding modifications. I imagine you could also use resistors instead and sacrifice some gain. Not sure what that would sound like. Russ

9th April 2009, 03:45 AM	#3
chrish diyAudio Member Join Date: Oct 2003 Location: Sydney	Order the CCS from DigiKey online.

9th April 2009, 10:14 PM	#4
dubdub diyAudio Member Join Date: Jan 2008	Hi- I would omit the ss rectifiers, these parts are proving to be unreliable and will soon be replaced on tubelab website with an alternative

14th April 2009, 09:03 PM	#5
newtube diyAudio Member Join Date: Mar 2009	Hi guys, i just want to check something with you boys. . . I am only using tube rectification so i can do without the freds and i don't need to put anything in their place? Now, what can i use instead of the ccs and heatsinks? i don't want to deal with digikey as they have messed me around big time, so what are my options fella's? This is the only thing stopping me from finishing the amp. Thanks again, Darran.

14th April 2009, 09:26 PM	#6
Ty_Bower diyAudio Member Join Date: Mar 2007 Location: Newark, DE	Try these part numbers from Mouser: 747-IXCP10M45S 532-530714B00 532-4880SG

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