Tube Buffer Success!

athos56 · 28th October 2008, 05:39 AM

I finished my Tube Buffer. It was an unqualified success. It is transparent, no psu noise and no coloration of the music, if the music didn't slowly come on as the tube rectifier warmed up I wouldn't have believed it was even there and I accidently wired the inputs to the outputs

It is a basic cathode follower with a choke for the cathode resistor. I used ceramic comp resistors, except for one hard to find value in the heater reference. The tubes are Jan 5687's and the rectifier is a 6v4. The PSU is a CLCLCR. I used the cloth covered solid core wire from AES. I also used 2 10k/10k Edcor transformers at the inputs and Angela Copper in oil caps at the output. Worked like a charm, now it is on to my Kt88 Set.

athos56 · 28th October 2008, 05:46 AM

My 47uf Solen caps in the PSU were too big for the case so I had to stand the bottom off a bit...

athos56 · 28th October 2008, 06:14 AM

More, and the filter should be a CLCLRC, not a CLCLCR

whitelabrat · 28th October 2008, 07:19 PM

Nice work!

Those Solens are pretty big huh? I just got my hands on a pair of 100uF's for a headphone amp project. HUGE! I'm going to have to mount them top side. Good thing the old Bogen chassis has a cage to keep hands out.

athos56 · 28th October 2008, 09:01 PM

They are! I was at aloss for a bit. I looked at those 100uf caps for another project... Thanks for the comment!

athos56 · 29th October 2008, 02:33 AM

Did some critical listening with my Grado SR-225's to some Radiohead (In Rainbows) With the volume up there is no change in the background noise (as in there is none). Everything sounded great!

eds65gto · 29th October 2008, 07:36 PM

Schematic and parts list please
Ed

Algar_emi · 29th October 2008, 07:49 PM

Indeed, schematic please

athos56 · 29th October 2008, 08:04 PM

When I get home I'll draw it up!

athos56 · 30th October 2008, 12:15 AM

One Channel

28th October 2008, 09:01 PM	#5
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	Yes They are! I was at aloss for a bit. I looked at those 100uf caps for another project... Thanks for the comment!

29th October 2008, 02:33 AM	#6
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	More Did some critical listening with my Grado SR-225's to some Radiohead (In Rainbows) With the volume up there is no change in the background noise (as in there is none). Everything sounded great!

29th October 2008, 07:36 PM	#7
eds65gto diyAudio Member Join Date: Dec 2004 Location: Mt Pleasant Sc	Tube Buffer Schematic and parts list please Ed

29th October 2008, 08:04 PM	#9
athos56 diyAudio Member Join Date: May 2006 Location: Yakima, Washington	Ok Ok! When I get home I'll draw it up!

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28th October 2008, 07:19 PM	#4
whitelabrat diyAudio Member Join Date: Dec 2006 Location: Maryland	Nice work! Those Solens are pretty big huh? I just got my hands on a pair of 100uF's for a headphone amp project. HUGE! I'm going to have to mount them top side. Good thing the old Bogen chassis has a cage to keep hands out.

29th October 2008, 07:49 PM	#8
Algar_emi diyAudio Member Join Date: Oct 2002 Location: Canada, Qc	Indeed, schematic please

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