Moving On

New Amp Restoration Project…

Today, we took some photos of what I think is a Supro Amp…
If that’s what it is, the amp was sold by Sears Roebuck and built by Danelectro back in the mid '50’s-to mid’60’s… Just a guess…
Here’s a link to the photo blog…


Maybe, one of you Gents might be able to confirm all this…
Here’s quickly, what the amp looks like…
Up here the store was called Simpson’s Sears…


webshots.com/photo/2911441100058559647kdiIXQ][/URL]



Everything is original in this amp including the wooden tremolo foot switch… The electronic components and tubes look original including the Jensen 12" speaker… The power amp and power supply chassis sits on the floor of the cabinet…
We didn’t have the “Floor” chassis removed from the amp yet…
Don’t know what the under-side of that chassis looks like yet…




Bill…

You’ve got quiet the piece of vintage gear there.

look and see if it says AlNiCo anywhere on the speaker.

keep shinin

jerm :cool:

I wish I could send my Kay bass amp up to you to have it restored…

That Kay Amp sounds like a real gem…
I’m gonna look to see if I have any information in my collection of Amplifier info files… I think I have some Kay Manuals and all…
What’s the model of that amp?


How about I come over to Flint some weekend with my toolkit and we do’re up????
Maybe, you can give me a tour of the neighbourhood…
And I can see how you make those fabulous Tracks…


The last time I was over that way was in June/July '61…
As I remember, the Lakes area was in a Big Heatwave…
Mid-to-Upper '90’s Day-and-night…
No relief…








Bill…

[edit]
I got some mail from Bob this morning…
He’s got that Ampro/Danelectro Amp Chassis outta the cabinet, already…
He don’t waist no time… He wants At-It…

Hi jeremysdemo:

That speaker is a Jensen Vintage speaker… I saw the model number of the speaker… It’s on the Rim/Flange, along with the CODE Number…
I was gonna take it down… However, you know… I didn’t… I’ll get it and post it up here for you… It’s the original speaker, I think…


Bob has been working on the Control Plate of the preamp chassis…
It looks almost new, from the photos he sent over…
Lotsa work left…
We’ll get some updated photos posted today, maybe… We’ll see…




Bill…

[edit] It’s a real shame that so many of these amps have seen the landfill sites…
sigh.

Bill, it is this model here - this is a web page from a guy who restored one.
Mine’s in worse shape - I bought it for 100 bucks at the pawn shop, it had a 4 ohm speaker in it which I think hurt it just a little.
I do not have the know-how to fix it, nor have I had the time to acquire that know how, but is really want it fixed up.
How much should it cost, esp. if some serious parts are needed?


It’s a weird amp - it does not have a tone control as such, but a contour knob.
Three jacks, although the fellow who restored this one did something different with those.


Schematic here on this great site:

http://www.freeinfosociety.com/electronics/schempage.php?cat=1

http://www.freeinfosociety.com/electronics/schematics/audio/kay720.pdf

Back Again:

We’re gonna get busy this afternoon and get the restore list going…
I’ve uploaded some photos that he sent over,last night, to the blog site…
They show the inital work on cleaning up the control panel… We’ll update the photo blog, as-it-goes…


The Jensen 12" speaker is not an alnico magnet…
It’s a Ceramic magnet…








The model and code of the speaker is shown on the rim, although not a good image of the code numbers…



Bill…

[edit]
Give me some time to absorb the info on those links you posted…
Maybe, if you can, take a break from tracking-and-mixing and get some photos of the amp…
Maybe, get the chassis outta the cabinet and do some of them, as well…


Save all the Parts…
hehehe…
lol…

I’ll open up those links…
Laterz…

[edit two]
Something happened here…
the text is underlined…
It looks like some kind of a link ????

I don’t know how THAT Happened… I am unable to EDIT this issue…

What a BEAUTIFUL Bass Amp, TomS…

A Class A Cathode bias’d 6L6 output Bass amp…
Do you know how rich sounding bottom end that amp can make??

What kind of speaker is in the cabinet?
Have you got them photos yet?
Get busy…
The amp can make about 12-to-18 watts…
Blow your face right offff…

:)
:p

It’s on a par with the Ampeg B15n machine…
They call it a 30 watt amp…
but that’s when the amp is wired as a Class AB1 negative Grid Bias’d output design…





Bill…

I forgot…






How much do I owe you for posting that Amp Print Link…
????



NiCe…





Bill…


Do I have to jump in my truck and run over to your place today?
hehe…

It’s only about 1600 miles, as the crow flies…

You know that you’d always be most welcome, and we’d give you the spare bed.

so, what do I need to learn to be able to fix it?

Bill, I just looked at all of the pictures you posted, that is going to be one heck of an amp when all is said and done. It is going to be really handsome.

Hi TomS:
I’m holding my breath till you post some photos of that amp…

I’m over at Bob’s place working on the Supro Amp as I reply yo your post…
We’ve uploaded a series of photos of what we did so far today…
I don’t have the link in front of me here…
Just open the link on the earlier thread…
We used his camera… I have mine here, but he doesn’t have an XD port on his computer… I’ll post to the Webshots when I get back home…



Bill…

I will get some photos up in a couple of hours, Bill. I will say that I am slow today, b/c we had Halloween here last night (to interfere with the arsonists and it worked!), and I had a root beer with my dumdums.

Back for the day:

Anyway I have posted a bunch of photos from Bob"s camera…
It’s much better than the one I have, by a factor of 2-or-more…
Anyway I tried to post the ones I got on my camera using his setup…
BUT…
he don’t have an XD port to import the photo files…
Now that I’m at my desk I’ll get busy and post the bunch I have…
It’s all about documenting this project…
The same with any restoration now that I have this ability to post photos and all…


You’re right TomS…
This thing is gonna be Some Amp…
There’s nothing special about it… It’s just an amp that is not being made anymore…


We are looking for the Schematic for this particular amp… NO-GO as yet…
Close, but no cigar…
When you See the photos that we got so far you’ll be surprised at how good it looks inside for something that is approaching 60 years old…


I’m gonna load those photos from my XD Card and then check the Board to see if you got any photos of that Kay 720 Amp…
I saw the print of it…
Nice…
Photos are gonna be nicer…
Well…
lol…

You’d never believe the story of this amp…
and how it arrived in Bob’s Possession…
Long story short… I was in the cellar of a place that was going to be torn down…
The amp was gonna go for trash…
The son-in-law got to it first…
Took it outta it’s misery…
Something like that…



Bill…

[edit] Halloween over here is tonight…
Everyone is bracing for the worst…
It’s not the kiddies…
It’s, well…
you know…

Back Again:

After all the searching we did, this is close to the Amp we’re restoring… It’s a Harmony model 415
However, it says Supro on the control panel… and…
it’s built on two chassis… and … is a Single Channel Preamp, with three input jacks…


This amp could be a rare ONE-of-a-KIND production…
Who Knows… ????


The Tremolo circuit on the Supro Amp does not have a 6AU6 pentode tube… It’s 1/2 of a 12AT7/ECC82 Tube…


Today, Bob is working on the cabinet covering…
I hope he has removed the speaker baffle panel…



I’ve updated the Photo Blog to include all the photos we have of the amp, so far…



All the resistors are well within Leo Fender’s tolerance…
BUT… I haven’t gotten into the Signal Caps or the Power Supply filters, yet…


The paper cone of that Jensen Speaker looks like it just came outta the factory…
It’s so nice…
No Ware-and-tare…
Only thing is, it’s not an alnico magnet…
However, it’s the original speaker…









Bill…

[edit]
Still waiting for those Kay Bass Amp Photos…

* Taps fingers on desk *

lol…
:whistle:

Ah, give me till this evening. I promise. It was a crzy Halloween weekend at our house, and with all of our pagan friends, it gets to be quite a to do.

Bob Is working his butt off on that Supro Amp Cabinet…
The grill panel is out of the cabinet… He’s working on re-gluing the covering…
He’s gonna take some photos of the cabinet, as it goes…
We’ll update the photo blog as-it-goes…
We are getting close to applying some fire to the amp…
We will use the Harmony Amp as a voltage reference till we come up with a closer print to the model amp that we have…





Bill…

Bill - this doesn’t look like any Supro amp I’ve ever seen. What is the word on the top control plate? Also, I doubt if Sears ever sold Supro amps - they typically sold Silvertone amps.

Thanks for the reply Mr Soul…


The logo on the chrome control plate says Ampro…
I believe…
There is no serial number that we can see anywhere on the chassis…
There are two… as you can see…
From what we’ve been able to learn, Danelectro made much of the stuff available at the department stores of the day… Up here, it was Simpson Sears, another name was Eatons…
That amp could very well be a ONE-OF Amp…


We’re getting close to powering it up…
I’m expecting it to run…
We’ll check some voltages and all…
There are many basic circuits showing voltages…
It would be nice to have the real deal, though…
That Harmony circuit is the closet we’ve seen so far…


I’d say, the amp saw some stage work…
not much though…
It would be nice to know what-and-where the guitar is for that kit…
???




Maybe, tomorrow, we’ll have some photos, to update the photo blog…





Bill…