1000a
- Thread starter sants28
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markn2wae
Mark T N2WAE
Please don't plug it in again until it gets looked at.
Great score sants28
You do have a ways to go before it is ready to run, you don't want to burn out the output or power transformers or tubes, as all these parts are rather expensive to replace, not to mention the sick feeling :tears: you get in your stomach when you "let out the magic smoke"
Search these forums for ways to bring this set up to "prime time", as the original capacitors are a time bomb and will not hold up for operation "as is".
A quick "overview" of what has to be done to it-
1) ALL oil insulated capacitors MUST be replaced, these WILL be bad just due to age.
2) ALL electrolytic caps. need to be replaced (the larger ones MAY be OK for a brief test, but don't depend on that).
3) The controls and switches will needed to be cleaned.
4) Tubes will needed to be tested or out-rite replaced.
5) Some method of cooling should be used, as this set runs HOT as stock.
6) Some type of "slow start" circuit should be used, esp. if you upgrade the power supply main capacitors.
7) BTW, ALL power supply diodes should be replaced, the original ones may be weakened by age.
I don't want to "rain on your parade", but this is a good deal even if you can't do the repairs yourself (Due to the high Voltages, experience is recommended).
Even an experienced tech. like myself was "cracking the books" to refresh myself in the repair of high Voltage tube equipment, as I hadn't done any until two years ago when I got my Sansui 1000A.
Good luck with the project, be careful with the high Voltages and enjoy the results when you are done!:tresbon:
PM me if you have any repair questions that aren't of general interest to the public forum.
Mark T.
Great score sants28
You do have a ways to go before it is ready to run, you don't want to burn out the output or power transformers or tubes, as all these parts are rather expensive to replace, not to mention the sick feeling :tears: you get in your stomach when you "let out the magic smoke"
Search these forums for ways to bring this set up to "prime time", as the original capacitors are a time bomb and will not hold up for operation "as is".
A quick "overview" of what has to be done to it-
1) ALL oil insulated capacitors MUST be replaced, these WILL be bad just due to age.
2) ALL electrolytic caps. need to be replaced (the larger ones MAY be OK for a brief test, but don't depend on that).
3) The controls and switches will needed to be cleaned.
4) Tubes will needed to be tested or out-rite replaced.
5) Some method of cooling should be used, as this set runs HOT as stock.
6) Some type of "slow start" circuit should be used, esp. if you upgrade the power supply main capacitors.
7) BTW, ALL power supply diodes should be replaced, the original ones may be weakened by age.
I don't want to "rain on your parade", but this is a good deal even if you can't do the repairs yourself (Due to the high Voltages, experience is recommended).
Even an experienced tech. like myself was "cracking the books" to refresh myself in the repair of high Voltage tube equipment, as I hadn't done any until two years ago when I got my Sansui 1000A.
Good luck with the project, be careful with the high Voltages and enjoy the results when you are done!:tresbon:
PM me if you have any repair questions that aren't of general interest to the public forum.
Mark T.
analog
Tubes Are Good
Let me chime in here, first when it is up to spec I think you will REALLY like the sound, I know I like mine a lot. Definitely heed Marks advice as it will need to be gone through. I was going to do mine my self but when I looked at the underside I chickened out and took it to a tech who has done a few 1000As. It was well worth it as he aligned the tuner and brought everything else up to spec. Overall a very nice receiver.
Oh ya they do run HOT, I have a fan I scavenged out of an old computer on it and with that it stays cooler.
Good luck.
Oh ya they do run HOT, I have a fan I scavenged out of an old computer on it and with that it stays cooler.
Good luck.
markn2wae
Mark T N2WAE
"Easy on the ears" is the best way I can describe it.
Mike,
Once the AK members convinced me to put the 1000A into my main system (I was testing it in the kitchen on top of the 'fridge') I was hooked!
All I remember about my previous "tube" stereo systems was that they all had good "non-fatiguing" sound, years later it was all solid state, more power etc., but there was that indescribable "something" that was missing from the sound.
I do have vintage SS setups in the kitchen, basement, bedroom but they are there only for mostly "casual" listening, but for the living room, that's where the Sansui 1000A stays!:yes:
I have not personally had any comparison to other tube receivers.:scratch2:
Mark T.
Mike,
Once the AK members convinced me to put the 1000A into my main system (I was testing it in the kitchen on top of the 'fridge') I was hooked!
All I remember about my previous "tube" stereo systems was that they all had good "non-fatiguing" sound, years later it was all solid state, more power etc., but there was that indescribable "something" that was missing from the sound.
I do have vintage SS setups in the kitchen, basement, bedroom but they are there only for mostly "casual" listening, but for the living room, that's where the Sansui 1000A stays!:yes:
I have not personally had any comparison to other tube receivers.:scratch2:
Mark T.
mhardy6647
Lunatic Member
yes you should buy it for that price; You may wish to simply recycle the very good output transformers to build a nice push-pull stereo amplifier, though.
(I have to admit, I don't have the heart to do that to the one I have, though)
(I have to admit, I don't have the heart to do that to the one I have, though)
LISTEN TO MARK !! He is right and I own one also and I couldn't agree more!!Mike,
Once the AK members convinced me to put the 1000A into my main system (I was testing it in the kitchen on top of the 'fridge') I was hooked!
All I remember about my previous "tube" stereo systems was that they all had good "non-fatiguing" sound, years later it was all solid state, more power etc., but there was that indescribable "something" that was missing from the sound.
I do have vintage SS setups in the kitchen, basement, bedroom but they are there only for mostly "casual" listening, but for the living room, that's where the Sansui 1000A stays!:yes:
I have not personally had any comparison to other tube receivers.:scratch2:
Mark T.
James
bhamham
Super Member
Thanks for that kvflyer. Does the 1000 run as hot as the A - is a cooling fan recommended for it too?
kvflyer
Super Member
I have to think that most of this stuff will benefit from a cooling fan. I changed out one of my HH Scott LK-72 amplifiers for a 299 and I use the fan on both. I have to get a DC fan so that I can easily slow down the fan. The hummmmm of the fan reminds me of the Electronic Central Offices when I worked for the phone company.
BTW, I just checked. AES has the 25E5 on sale for $5.52 each. Not a lot of bux!
BTW, I just checked. AES has the 25E5 on sale for $5.52 each. Not a lot of bux!
tarponhead
New Member
Sants,
Congrats on the find!! :thmbsp:
Thats a better price than I gave.
I have a few posts on the 1000A going, and have picked up good info searching this forum. I decided to jump in with both feet and try doing it myself. Lots of learning going on, but nothing too bad.
With 2 of us asking questions to the forum, we should create a rather comprehensive "how to" for the 1000A.
Good luck
Tom
Congrats on the find!! :thmbsp:
Thats a better price than I gave.
I have a few posts on the 1000A going, and have picked up good info searching this forum. I decided to jump in with both feet and try doing it myself. Lots of learning going on, but nothing too bad.
With 2 of us asking questions to the forum, we should create a rather comprehensive "how to" for the 1000A.
Good luck
Tom
Did you have the "SPEAKER" switch, "OFF". I know....MR. Obvious, but Little things do happen.
In the middle of mine right now.
Larry
In the middle of mine right now.
Larry
