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Scott LK-72

J

James^

New Member
Pictured below is a Scott LK-72.

It is cosmetically pretty nice, not mint buy pretty nice, including all the knobs which are in good solid condition.
Also wood cabinet √ and metal grill √ are in very nice shape.

(I just photographed it "as is" did not dust it, wipe it down or anything; could look better!)

It is not working.

I don't know exactly what is wrong, but I suspect more than just tubes.

a) would anyone weigh in on the value of the unit as it sits?

b) would anyone assign a value to any of the major "parts" of this unit?
- faceplate
- knobs
- chassis
- cabinet

c) would value of a or b be greater?

Thanks,

James


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Scott%20LK-72%20Stereo%20Laboratory%20Amplifier%20Kit%20005%20%285-8%29-L.jpg



Scott%20LK-72%20Stereo%20Laboratory%20Amplifier%20Kit%20008%20%285-8%29-L.jpg


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That one is nice enough that it should be rebuilt. Yes, you might realize a greater financial return by parting it out, but by tearing it apart, you would be committing an act of vandalism on a classic tube amplifier. If it is beyond your capabilities or available time to rebuild, let someone else have a chance to let it live, and sing.

Once it's gone, it's gone; and these are a lot less common than 1970s Pioneer receivers. Properly fettled, they sound better, too.
 
That is a very nice and pretty machine. I would value the non-working machine at $200 and the wood case at $150. This is based on unscientific, finger licking for the wind, guessing. Please don't even think of parting that sweetie out. :smoke:
 
GP49 said:
That one is nice enough that it should be rebuilt. Yes, you might realize a greater financial return by parting it out, but by tearing it apart, you would be committing an act of vandalism on a classic tube amplifier. If it is beyond your capabilities or available time to rebuild, let someone else have a chance to let it live, and sing.

Once it's gone, it's gone; and these are a lot less common than 1970s Pioneer receivers. Properly fettled, they sound better, too.
Click to expand...

Oh, Mr. GP49!

I'm new to this forum (well... read it a lot, but first post).
But I'm an old timer, started with Mac and Bozak and Benjamin Miracord back in the '60s.
And yours was just the kind of reply I needed.

There's all sorts of things to weigh.
And money is certainly one of them.
But history and heritage and rarity need to be reckoned with as well, in the right cases.

Thanks for making a good anti-cannibalism argument!

James

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Tube Sound said:
That is a very nice and pretty machine. I would value the non-working machine at $200 and the wood case at $150. This is based on unscientific, finger licking for the wind, guessing. Please don't even think of parting that sweetie out. :smoke:
Click to expand...

Tube Sound,

Thanks for the reply.

So... two votes for NOT parting it out!

10-4

And thanks for your "unscientific" value estimates.

Got no idea where I'm headed with this unit.

But all info is good info.

Hope even more yet will add additional thoughts and opinions.

James

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If you don't want to spend the $ to fix and enjoy it - let one of us have a crack at it. It is a special thing that needs to be rescued and brought back to it's former glory. Please don't part it out - some of us live for the opportunity to fix and/or own wonderful heritage pieces like this.
 
I'm sorta playing devil's advocate here, but:
Wouldn't parting it out potentially allow someone trying to refurb another one of these a chance at acquiring some needed parts?
Granted, that one looks awfully nice and it would seem a shame to denigrate it. I'm just wondering...and learning.
 
The unit looks, IMO, to be in to good of shape to consider parting out. Rebuild or sell for someone else to rebuild.

I concur on the value estimates. Should be an easy sell for min. $200 w/o wood case. I have no opinion or experience on the case. Love my LK48.
 
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Thanks, everyone.

After everyone's replies to my initial question, let me ask a more specific question please.

I've had this amp for a while.
Early on I took it to a real good tech (and circuit designer, tube builder, etc.) whom I've known for decades (a term you must be a certain age to use) for him to look at and tell me what I had.
And he told me
a) it's not currently in working condition
b) it has a bad _______ , and will cost more to fix than the unit is worth

Now... I can't remember for sure what he said the "big problem" was. grrr:mad:
I THINK it was the power supply transformer.

[I know it wasn't tubes or caps or chokes or such
[because he would have dug into that in a heartbeat
[because he knew that this was a good unit
[and those parts would be reasonable and available to him
[so it had to be either the power supply or one of the output transformers
[and it seems like I'm thinking he said it was the power supply

So... MY QUESTION IS

Is a bad power supply transformer (or output transformer?) in this amp a death blow?
Or does a real "vintage guy" know how to source these BIG parts at some kind of reasonable prices so that you can restore the amp without it costing an arm and a leg.

Looking forward to your replies.

James

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Transformers can be rewound. I can't tell you the cost but Heyboer transformers seem to be highly recommended. Otherwise, they come up on ebay fairly often and AKs Bartertown might yield results but you may have to be patient to come up with one at a reasonable price.
Obviously, if you do the work yourself, you will save a lot and it may make the difference between whether it's a worthwhile investment or not.
I just finished rebuilding an LK72 about a month ago and it is a very nice sounding amp but I'm not one to say you shouldn't part it out. If it's going to cost as much or more than it's worth to repair it, have at it. Several other amps will live again because of it.
 
From what I've read here in the past, the average price to have a transformer rewound is approx. $100. Lots of people think that is reasonable to restore a nice unit.
 
At 100$ for a xfmr, I vote for the restore. I'll grant you most of us would do the work ourselves. If I was rebuilding one now and needed original parts, I'd be trying to talk you into parting it out now.
 
Let's say you partition out. Yes, the knobs, faceplate, non-electronic parts can be sold.

But when you start parting out the electronics, and you snell some non-repairable parts, do you really want to deal with all that anger when you have sold to them a part that is bad and cannot be repaired?

Since you are not sure what is really wrong with it, do you have a way to check that you are not selling in repairable electronic parts?

If you want the most with the least hassle, sell the unit as a whole "as is" or sell the amp and cover separately.

IMHO.
 
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Hey everyone.

Thanks.

Though...

Everyone seems to have latched onto output transformer: cost of rewinding, replacement, etc.

But my statement really was that I more thought that it was the power supply.

Any comments on cost of, or path to, a new power supply for this amp.

Thanks,

James

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He didn't say output xfmr, just xfmr. The work to rewind is about the same. . I didn't come up with that #. You can certainly get a price. You should also figure in shipping back and forth.
 
Yup, all transformers cost about the same to rewind. The transformer is the most expensive part of the power supply to fix. Anything else, eg: capacitors, resistors, rectifier, tube, etc. is relatively cheap (unless you have to pay for labor).
 
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