1964 Amplifier!!

Rotus623 · 02:29 AM

I just picked up a super-clean 1964 Sano Supersonic amplifier!! The tone out of this amp is sweeeeettttt!It takes my OD pedal so nicely. The power tubes are 8417's. Hope I don't have to replace those anytime soon $$$$$$$$$$. Just thought you guys might be interested!!

Pano · 8th January 2011, 02:47 AM

That thing even looks loud!

klm1 · 8th January 2011, 03:05 AM

that's 100W tube power in a push-pull config; it IS loudness...
AES shows out of stock on 8417's, I'd re-bias lower, if I were you...

Rotus623 · 8th January 2011, 03:45 AM

Yeah KLM one, I know what you re saying bro. Turn it down and conserve on the tubes. Tube depot has the 8417's for 70.00 each. Not too bad. Plus I dont want to add a bias pot to this classic. The only problem that I have with it is that the 15" is not stock, and the dB level is higher than the 8" speakers.

Rotus623 · 8th January 2011, 03:46 AM

Pano, it's loud man. My ears are ringing right now actually.

Rockmore · 8th January 2011, 04:10 AM

All I can say is, Rock 'N Roll!

Go through it with a fine tooth comb for common-sense stuff in your look-see. Fix anything easy and common first. Crank it buddy. Old school STILL rocks.

danFrank · 8th January 2011, 05:48 AM

If you have to get new 8417 tubes DO NOT get the GE branded ones as they had lots of problems with thermal runaway. IIRC the Sylvania ones are the good ones.
You can replace with 6550's but you will probably have to add another gain stage or up the gain on one of the existing stages as the 8417 needs about half the drive of a 6550.
I would also replace power supply / electrolytic capacitors as the originals are probably bad and have become leaky.
Good luck.... Daniel

Rotus623 · 8th January 2011, 02:20 PM

Thanks for the advice Dan. The tubes that are in here are the Sylvania ones. They look like they have lots of life left. I hear the 8417's are long-lived.

kevinkr · 8th January 2011, 02:38 PM

Still, I'd grab some 8417 while the grabbing is good. I'm not sure who else made the 8417, but IMVLE the Sylvania seemed rugged. There really isn't a great sub for this tube either so get some now.

Yep, I know I sound redundant.

Rotus623 · 8th January 2011, 03:16 PM

Quote:

Originally Posted by kevinkr

Still, I'd grab some 8417 while the grabbing is good. I'm not sure who else made the 8417, but IMVLE the Sylvania seemed rugged. There really isn't a great sub for this tube either so get some now.

Yep, I know I sound redundant.

Thanks, thats actually good advice. Those tubes cost 75.00 each, so I am only going to get one set. : )

8th January 2011, 02:26 AM	#1
Rotus623 diyAudio Member Join Date: Sep 2010	1964 Amplifier!! I just picked up a super-clean 1964 Sano Supersonic amplifier!! The tone out of this amp is sweeeeettttt!It takes my OD pedal so nicely. The power tubes are 8417's. Hope I don't have to replace those anytime soon $$$$$$$$$$. Just thought you guys might be interested!! Last edited by Rotus623; 8th January 2011 at 02:29 AM.

8th January 2011, 03:05 AM	#3
klm1 diyAudio Member Join Date: Oct 2004 Location: Highland, MI	Sweeeettt! that's 100W tube power in a push-pull config; it IS loudness... AES shows out of stock on 8417's, I'd re-bias lower, if I were you... __________________ some like it hot;"the biggest mistakes are made by those who make assumptions!" Graham Maynard

8th January 2011, 02:38 PM	#9
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Still, I'd grab some 8417 while the grabbing is good. I'm not sure who else made the 8417, but IMVLE the Sylvania seemed rugged. There really isn't a great sub for this tube either so get some now. Yep, I know I sound redundant. __________________ www.kta-hifi.net

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8th January 2011, 02:47 AM	#2
Pano diyAudio Moderator Join Date: Oct 2004 Location: North Carolina Blog Entries: 4	That thing even looks loud!

8th January 2011, 03:45 AM	#4
Rotus623 diyAudio Member Join Date: Sep 2010	Yeah KLM one, I know what you re saying bro. Turn it down and conserve on the tubes. Tube depot has the 8417's for 70.00 each. Not too bad. Plus I dont want to add a bias pot to this classic. The only problem that I have with it is that the 15" is not stock, and the dB level is higher than the 8" speakers.

8th January 2011, 03:46 AM	#5
Rotus623 diyAudio Member Join Date: Sep 2010	Pano, it's loud man. My ears are ringing right now actually.

8th January 2011, 04:10 AM	#6
Rockmore diyAudio Member Join Date: Jun 2009 Location: Red, White, and Blue USA	All I can say is, Rock 'N Roll! Go through it with a fine tooth comb for common-sense stuff in your look-see. Fix anything easy and common first. Crank it buddy. Old school STILL rocks.

8th January 2011, 05:48 AM	#7
danFrank diyAudio Member Join Date: May 2005 Location: California	If you have to get new 8417 tubes DO NOT get the GE branded ones as they had lots of problems with thermal runaway. IIRC the Sylvania ones are the good ones. You can replace with 6550's but you will probably have to add another gain stage or up the gain on one of the existing stages as the 8417 needs about half the drive of a 6550. I would also replace power supply / electrolytic capacitors as the originals are probably bad and have become leaky. Good luck.... Daniel

8th January 2011, 02:20 PM	#8
Rotus623 diyAudio Member Join Date: Sep 2010	Thanks for the advice Dan. The tubes that are in here are the Sylvania ones. They look like they have lots of life left. I hear the 8417's are long-lived.

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