JBL SA-600 total restoration
Hello JBL-friends,
Is there anybody in this forum who can tell me what type of powertransistors were used in the JBL SA-600 integrated amplifier. The official JBL-schedule only mentions the JBL parts-number. I also would like to know what type of toggleswitches were used. Does anyone of you know how to obtain the colour: Camo solid tube green. I have been searching all over the Netherlands but couldn't find a matching colour.
I had to saw through the shaft of some potentiometers because the former owner glued the knobs to the shaft. Well, that's all in the game when restoring such an item !!!
I would be very pleased to receive some helpful suggestions.
Kind regards,
Jan Slagman
The Netherlands.
Power-transistors JBL SA-600 integrated amplifier
Hello everyone,
Today i got some inside information concerning the power-transistors in a JBL SA-600 integrated amplifier..
It is said JBL used the TRANSISTOR, NPN MPS6520 and
TRANSISTOR, MPS6518
With kind regards,
Jan Slagman
The Netherlands
Power-transistors JBL SA-600
Hello Mr.Hoerninger,
Thanks for your kind information. I will contact my source and ask him for the right transistors once again.
With kind regards,
Jan Slagman
The Netherlands
JBL SA-600 total restoration.
Quote:
Originally Posted by
doodlebug
I had the "Energizer" version this amp back in the 70s. They used 2N3055 transistors in the output. I would suspect, however, that if one or more of them are bad, then there's another problem elsewhere in the amp.
The schematic for the SA-600 found in the links via Dr. Leach's web site, however, shows a fully direct-coupled amp. I seem to recall my Energizer used a transformer to couple the final stage (the one with the 2N3055s).
Given the article, I'd suggest you power it up on a variac once you're replaced the parts you think you need. They'll be taken out again unless all the bad parts are replaced together.
Hope that helps.
Cheers,
David
Hi David,
Thanks a lot for your interesting input. Actually i am a bit astonished to learn how little is known about the parts that were used designing the JBL SA-600 amplifier. Ofcourse you can find a JBL schedule with JBL partnumbers, but unfortunately parts can't be obtained from JBL anymore.
You just have to know the specifications of the factory who made these parts wayback in the mid sixties.
When this project has been finished i will report the alterations we made and the alternative parts we used to this forum.
Maybe this information can be of any help to JBL SA-600 maniacs in future.
With kind regards,
Jan Slagman
Veenendaal
The Netherlands.
Total restoration JBL SA-600 from 1966
Hello JBL friends,
About half a year ago i promised i would report the total restoration of my rusty and heavily abused JBL SA-600 integrated amplifier, which i bought for € 55,00 on Dutch Marketplace (kinda Ebay). Have a look at:
http://www.hififorum.nl/index.php?to...2941#msg162941
Anyone who is interested in technical details can drop me a line.
With kind regards,
Jan Slagman
Veenendaal
The Netherlands
Total restoration of a fourty years old JBL SA-600
Quote:
Originally Posted by
jan_slagman
Hello JBL friends,
About half a year ago i promised i would report the total restoration of my rusty and heavily abused JBL SA-600 integrated amplifier, which i bought for € 55,00 on Dutch Marketplace (kinda Ebay). Have a look at:
http://www.hififorum.nl/index.php?to...2941#msg162941
Anyone who is interested in technical details can drop me a line.
With kind regards,
Jan Slagman
Veenendaal
The Netherlands
Hello JBL friends,
At the beginning of 2007 i noticed much to my astonishment someone offered a JBL SA-600 integrated amplifier on Dutch Ebay and this was the very first time in my life i saw a JBL SA-600 for sale in Holland. Wayback in 1966 we had a small club of Hifi lovers and i had the JBL catalogue with that amplifier laying on my bed side cabinet.
Before going to sleep i used to look at the glossypicture of that “unreachable” dreammachine and I still have that catalogue. The amplifier was offered for € 50,00 on Dutch Ebay and i won it for € 55,00. But when the amplifier had been delivered and unpacked i didn’t know what i faced. Terrible, totally rusted, dusty, missing a volumeknob, two levers of two toggleswitches, the right black part of the front and the uppercover excisting out of two parts had been broken. The former owner told me he had bought the amplifier from someone who used it in his moisty garage for background music when working on his car A good friend of mine who is an electronic engineer warned me a restoration would cost me a massive amount. After tossing and turning a few days i decided to realize the dream of my youth. Another friend of mine, who is a metal expert, made a new knob, two levers for the toggle switches and the black side part, working on it for some ten hours. Five knobs, five levers and one side part had to be anodized again to get the same colour. The enclosure was cleaned and repainted in olive green.
Two power transistors and fourteen small transistors had broke down and every capacitor and every resistor was replaced. I made a pair of massive American walnutpanels myself and i oiled them the way JBL used to do (boiled lineseed mixed with gum terpentine). It took about half a year before every part had been restored and brought back to specifications. Now the amplifier has better specifications then 40 years ago, when leaving the factory in Los Angeles.
Ofcourse one can buy a new amplifier for the amount i spent to restorate the JBL SA-600, but to me the most important thing was to realize a dream i once cherished in my youth.
With kind regards,
Jan Slagman
Veenendaal
The Netherlands
This a free translation of my Dutch article on www.hififorum.nl
I have a SA-600 for sale - clean
I have been googling and researching what I have found in the workshop/attic of a friend's husband, an audiophile. This is the only James B Lansing piece he had, and it's been wrapped up in heavy plastic. She said it was his when they married, and he had it for years till he upgraded to SAE when he started working with SAE. It's got everything intact and appears to be in fantastic shape for its age. She thinks he paid close to $400 for it when it was new. That seems to be in keeping with the ads and things I read online.
I have not yet located a power cord for it. I was going to email the JBL site and ask if they might be able to refer me to someone with one.
I have sold quite a few of this family's audio items at eBay in the fast few months, such as Acurus, Mondial, Aragon audio items from his personal office, and many items still new in their packaging.
eMail me for details if you might be interested? I'd like to see this go to a good home if someone's feeling a tad nostalgic and wants a piece of audio history that doesn't need cosmetic restoration.
Pam
on ebay: digi_noze (seller name)
:)
