I wonder if that's an old Delta box now cleverly disguised as an amp case?
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I wonder if that's an old Delta box now cleverly disguised as an amp case?
Cool find! Too bad you missed out on the Hammond. :(
The lack of top-mount cans isn't uncommon, don't be surprised if there's a couple of 15-30mfd paper axials underneath.
That's a real puzzler, the FC speaker seems out of place with a tremmie circuit timeline-wise. The latest FC speaker in an MI amp I've seen was from an M2 Hammond, both of which now reside in a similar style guitar amp. :)
Quote:
Originally Posted by Audio_by_Goodwill
Way later than the amp.:2thumbsup:
Type fonts often change over time.
Regardless. I would bet 50 bucks it's not the original logo.
I am 99% certain it's home brew.
Probably a 50-ish DIY from scavenged parts.
Still, probably has value...nice display piece for a collector.
It's generated quite a bit of interest over at the Amp Garage. Puzzlement too.
The reason I suggested Gruhen is that he would know if it was a manufactured item or a homebrew. From experience, in those days the only way to do panel like that was to use letter transfer; a tedious and difficult to master art. That is, without the thing coming out looking like a ransom note cut from the newspaper. You'll be able to tell by examination if it's a silk screen. I suspect if the panel is silk screened there was some limited production. Or a kit.
It may not have been a guitar amp. Though I hadn't noticed the tremolo. It may have been built for accordion or some early electronic keyboard?
I don't want to know what the Steinway or B3 went for let alone the leslies. My leslie is in the building stages from a blemished (bad) new walnut cab built for Leslie/Suzuki, and a bunch of parts scavenged from murdered and looted Leslies. I'm probably going to bi-amp and use an Altec in the bass section.
It's a sad deal when a musician goes and the family doesn't know what to do about the stuff. I've heard tales but never participated in one. I've known guys who have paid $200 for a '50s Selmer #7 tenor at garage sales. My future widow has a list of guys to help supervise the disposition of my crud. Sad tale. Good for you on paying the asking.
In any case it has generated a lot of interest at The Amp Garage. About half of us in the business professionally. Most don't want to OWN the thing, but would sure like to get some detailed gut shots of the chassis underneath, along with transformer OT winding ratios and what not. Then the thing should have a place of honor amongst a collection of such things. There are a variety of ways for instance to do a phase inverter and even by the fifties it was usually accomplished with a tube. So maybe it's a parallel pair or there's a driver transformer under the hood? Those sorts of questions. How do you implement trem without an additional tube I dunno. Where's the trem tube? Did he use bias oscillation or a photo conductor gizmo? How did he make it oscillate?The two halves of the 12ax7 are used as input and recovery after the tone stack usually. No pi tube, no trem tube, and why then all the inputs? There are more or less two chassis; the one behind the face plate and the one with the power (looks like Stancor) transformer and the output tranny sticking out the side. All of these things point to a very clever hobbyist or a production prototype you know? Why make a home brew so compact and bitchin' looking? That's why I mention Hartley and Bob Crooks. Those guys had their hands in a lot of stuff before they had viable companys. Leo didn't come on the scene until the late '40s and he sorta normalized things. Before that there were guitar amps but they were all weird and unique and didn't work very well. If it was a 40's design though you'd expect octals. Not that tube lineup.
It's of historical interest to a bunch of us. We'd like to know what's going on in there.
Dan
There's also Magnatone and Supro. These folks made amps for Sears, Montgomery Wards, and other large retailers in addition to their own brands. The cabs often have that sort of ply construction and covering. Leo used pine for the sides and plywood for the baffles. Made them road worthy. Lot's of questions.
My 1956 M3 has a Jensen field coil. Hammond didn't change for good until the late '50s or early '60s; and then the PM speakers and FC speakers seem to be mixed up by serial number. Like they would say "how we gonna do this one, FC or PM?" while they used up stock.Quote:
Originally Posted by bfish
Funny amp. Wonder what the Dim<->Bright knob does?
OK, i don't have a lotta time right now, but i did manage to get a few pics for those very inquiring minds.
Again, thanks for all the input on this folks!
One thing i have to relate, and i'll back it with some pics when i have some time to clean it up a bit. This cabinet is really well made, like by an experienced cabinet builder, id be proud to call it my work. That being said, IMO if it's DIY, it's a top shelf example.
Honestly, when i look at it i get the feeling of "sears and roebuck". Dig those extra holes in the chassis, one size fits all?
The pots on the control panel are all marked "2 meg" and one of the numbers is 1376138, which to me suggested CTS 38th week of 61 making me think it's circa '62 vintage.
FWIW, i think the Delta emblem was swiped from an 80's water faucet display in a plumbing store.
http://i107.photobucket.com/albums/m...derchassis.jpg
http://i107.photobucket.com/albums/m...panelunder.jpg
http://i107.photobucket.com/albums/m...ie427ss/PT.jpg
http://i107.photobucket.com/albums/m...e427ss/OPT.jpg
I think it simply dims or brightens the pilot light(mechanically by moving the bulb in relation to the lens) it looks to be connected to the heater circuit.Quote:
Originally Posted by Panomaniac
It's definitely push pull. Not parallel. I think the FC speaker was added. It has flying splices covered with tape. There are enough tubes to do a bias type trem but I've got to spend more time with it. Fixed bias supply appears to be implimented with that metal case diode over between the filter cap and the big power resistor. I'll post these over at The Amp Garage afterwhile. I agree '60s and very weird in some areas. There have been amateur hands in there.
Good job!
Hmmmm..... Kinky!Quote:
Originally Posted by bowtie427ss