Flea Market, Yard Sale, Pawnshop And Local Finds 2019

Discussion in 'Project Depot' started by mozz, Mar 10, 2019.

  1. Mickey

    Mickey Gandalf the Intonationer

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    All kidding aside, some years ago Gruhn's sold Mama Maybelle Carter's 1928 Gibson L5.
    (If you don't know who she was, Google her.)
    I don't know what was paid but the asking price was $795,000.00.
    The buyer donated it to the Country Music Hall of Fame where it is today.
     
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  2. mozz

    mozz Well-Known Member Supporting Member

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    Passed on this today, guy wanted $175. It had tuner parts missing, back was scratched up very bad, neck had dents on the back, was really abused.

    IMG_20190414_090529628.jpg
     
  3. idiotsdelight

    idiotsdelight Well-Known Member

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    Is that a Gretsch?
     

  4. dspellman

    dspellman Well-Known Member

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    PB 300 is 150W @8 ohms, [email protected] ohms, [email protected] 2 ohms.
     
  5. mozz

    mozz Well-Known Member Supporting Member

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    No name on the headstock. Almost a "V" like a Dean. Maybe the inlays shape is the clue.
     
  6. jimytheassassin

    jimytheassassin Well-Known Member

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    Here's a find from about 2010 that just came back to me. It was at my dads house and he seemed to have interest in it so I had left it for him to fiddle with. Well I guess that interest faded and he wanted me to take ownership of it. Back then I was more curious than selective of roadside finds.

    Originally this was a HUGE console radio/record player made by Packard Bell in 1965. I dismantled the worn wooden cabinet and salvaged the electronics. I'm not sure what I'd do with it now except dismantle it further for small components. The Schumacher transformers, 6eu7 tube, and assortment of carbon comp resistors might be of use. The solid state power amp portion is curious. Probably silicon transistors if I had to guess.

    I dont have photos of the speaker arrays (all foster brand I think) or the packard bell record player deck

    97f4c0073c650f36caad66a6e1851ccf.jpg 585cd9f2befb85cb6609a0a0aa53ebf9.jpg b9189f9fc424ae038891255fe812bd2a.jpg 63699ccd0d5b2062a94c762a10aa6e23.jpg
    The double stamp on the Solid state PT side is cool 1fd7f2526e1a73d0f916154264931152.jpg 291afae01457bbb77182137732a243dd.jpg 2d78061894800aaf8532dc42f8d5f500.jpg c13ae2b291d6f9a8981626dfb94e37da.jpg 23493857e082d94d054ed64253918148.jpg f025b22cd536db96c14f516b51017baf.jpg
    d0bf2f90af4e66fc5995e6966599b654.jpg
     
    Last edited: Apr 19, 2019
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  7. mozz

    mozz Well-Known Member Supporting Member

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    Probably germanium outputs,was common to use them. I don't reuse carbon comp resistors, they usually go up in value(resistance). The 6eu7 and the tube sockets are worth more than the whole thing. I'd gut it and strip it. I do that to anything though. That's my canned response. Add up the tube currents and write it on the trans. The output trans you have to calculate the ratio to see if it's good for anything.
     
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  8. jimytheassassin

    jimytheassassin Well-Known Member

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    True! Yes I was thinking the same thing. A few of the carbon comps might be of some interest to me if they measure well. I could see using them sparingly. But the tube sockets are very nice. And since I haven't found any schematics, I probably will endeavor to measure the ratio on the pt. Good stuff! Right now the PT is hooked up with a half wave rectifier arrangement. No center tap. It's hard to say from plain observation what its actual value will be until measuring it

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  9. mozz

    mozz Well-Known Member Supporting Member

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    PT output current might be low due to no output tubes. Probably enough for a 6v6 or similar. Transistor probably has its own winding, you could use that for fixed bias. Lot of the old transformer part numbers have no catalog equivalent, they were the builders part numbers. There is a few ways to get an idea of PT output current, I usually tack a bridge rect on, 22uf, then measure unloaded voltage. Then 8k load, measure, 4k load, measure. ,400v/ 4000ohms equals 100 ma. If it's sagging a lot by then you've reached max. Pick your output tube or tubes based on that.


    Clip those old disc caps out too, they don't really go bad. They were used in old supros valcos and premiers. They were about the cheapest cap you could buy back then, not great for audio compared to a film cap but sometimes you don't want a hi-fi amp for guitar. I built a deluxe clone for a friend with cheap disc caps, he loves it.
     
    Last edited: Apr 19, 2019
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  10. jimytheassassin

    jimytheassassin Well-Known Member

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    I'm wondering. If I pull off the bell cap, what's the chance I might find other taps that werent leaded.

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  11. jimytheassassin

    jimytheassassin Well-Known Member

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    Just took a better look through this old packard bell and I feel like this serves as a good example for those hunting treasure on the curb. Bigger is not always better. The salvageable parts as you pointed out are fairly low in value. Caps and tube sockets are the biggest part of this catch. Most of the resistors are already have short leads making them even less attractive for a pull (besides some odd values). The next best part is the rotary 12 pole 4 position switch. The pots maybe, maybe not. The PT checks ok-ish from a continuity standpoint and might prove usable though not ideal. Other than that ,and a the 6eu7 and 6gh8a tube, this is mostly scrap.

    By comparison, my Silvertone organ tube amp haul, which is much smaller if we're just talking electronics, was a far better score. That thing is nearly ready to roll with a few changes and updates.

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  12. Manodano

    Manodano Well-Known Member Supporting Member

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    I've stripped or reused quite a few old console chassis like that. It's a lost art, there's not much of this stuff left. Here's some general tips for this sort of thing.

    I learned to not ravage a chassis without first looking at it carefully and trying to formulate my reuse plan. A lot of times they simply don't lend themselves to repurposing for a guitar amp - especially the ones chocked full of radio circuitry. When they do, though, you can save yourself a lot of work if you leave the key power supply elements intact. Also try to save and reuse as many of the cosmetic elements as possible.

    So, before you start cutting anything out, slow down a second. Do this first and you'll jumpstart your new project and you won't be starting your new project from scratch. Save what you can - you can upgrade whatever you want to later:

    1) First, pull all the tubes except the rectifier and measure the secondary voltages on the power transformer. While you are at it, measure the b+ voltage downstream of the rectifier and power supply filters, assuming they are intact. Are the voltages usable for a guitar circuit? Then consider the following.

    2) Study the number, pins, and layout/configuration of the sockets in place to see if this lends itself to a project. If so, leave the sockets in place. Then

    3) Leave the 120 volts wiring feeding the primary side of the power transformer in place. This way you've saved yourself installing a new wall plug, power wire, on-off switch, and fuse feeding the power transformer.

    4) Leave the rectifier and filter caps in place on the b+ circuit.

    5) Leave the filament wiring in place. Wiring filaments is a pain in the ass. The factory tech in 1962 probably had the job down better that you or I ever will. You might have to move the filament wiring to a different socket pin, but that's a lot easier than rewiring the whole thing. Also, you are likely have a pilot light in place on the filament circuit - leave it be!

    6) The terminal strips and ground lugs are super useful - leave 'em be.

    7) I leave any phono jacks or 1/4" jacks in place - sometimes they end up getting used.

    8) I'm slow to gut the pots out because most of the time they can be reused in place - and you already have the knobs for them.

    9) I try to salvage the screws and nuts and bolts that hold the chassis in the console. I use those same screws and bolts to mount the repurposed amp wherever it ends up.

    10) I keep all the aesthetic elements that I can, so that my amp keeps its 50s or 60s tube vibe. I'll resuse the faceplace, and knobs, when possible.
     
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  13. jimytheassassin

    jimytheassassin Well-Known Member

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    This is great advice! And I plan on taking it after I put the power transformer back in. Lol. Ya I pulled the PT because my check of the leads was odd (to me at least).

    There are 5 leads.
    1-2 ; Black and black/red are my primary.
    3 ; Red is one end of the secondary B+
    4 ; Green us one end of the filament
    5 ; Green/red is a shared connection to the end of both B+ and filament. This lead was connected to chassis ground.

    Continuity check was
    10 between the primary
    1 between green and green/red
    74 between red and green/red

    I'm not accustomed to seeing a sharing of return connections. Would this be a problem if I tried to setup a full wave rectifier? I'm guessing yes. Perhaps the half wave is fine anyways. I forsee this becoming one of those rob robinette micro builds if anything.


    b9c45f058b6a9470eb1fbce5ff23bf8e.jpg

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  14. mozz

    mozz Well-Known Member Supporting Member

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    Looks just like you said. Half wave is gonna have to do. What is your high voltage? AC anyway. I see more than 1 diode there, maybe they used a voltage doubler?
     
  15. jimytheassassin

    jimytheassassin Well-Known Member

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    Hmm. I dont know. I only see one diode in the HT supply. I think there's a couple more diode things in the circuit way further down . I mean the look more like modern diodes. Maybe they're resistors? I'm not sure. But I dont suspect a voltage doubler exists. Then again I also need to see what that arrangement would look like

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  16. mozz

    mozz Well-Known Member Supporting Member

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    There's 4 top hat diodes there, so either full wave bridge or ? If the manufacturer could make a cheaper transformer without center taps, they did it. Bogens often have voltage doublers, less winding's, less copper, hence cheaper.
     
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  17. jimytheassassin

    jimytheassassin Well-Known Member

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    Oh I see what you meant now. I'm sorry 8f it seemed confusing in my post. There's two different chassis. The tube pre-amp/tuner has a single top hat diode in the power supply. The solid state power amp chassis has the 4 top hat diodes in a bridge as you noted.

    Good news! I just replaced the PT on the tube chassis and soldered the connections back where they belong. I'll give it a test through my current limiter and try to get a voltage read soon at full power (if it works)

    Tube preamp
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    Solid state power amp
    3c1e4712b6b5f9d3d0edd0017d9cf2c0.jpg
     
  18. jimytheassassin

    jimytheassassin Well-Known Member

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    I saw this today for $27 and bit on it. My son who’s 5 has been asking About drum lessons lately. Well there you go. It’s in great shape with only minor cosmetic flaws. It included all the hardware and manual but didn’t come with a seat. I have an extra from An adult kit that may work. Either way very solvable. I even have. Better 10” Cymbal For the top I think.

    So anyways, it looks like my band will have a drummer again! I tuned it up and it doesn’t sound half bad. adfd297670a105a06890984c97647be4.jpg 50456f188d3f53b213918a01a7c52383.jpg


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  19. jimytheassassin

    jimytheassassin Well-Known Member

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    Totally worth the price of admission. He has a natural rhythm. He was getting around the kit even worn out instruction. We wrote two demos already
    912b8555b013e895b80ae87343bc1ce0.jpg d19920312a61345614674cc4ebafceaa.jpg 89f2f73952c1bfbb490c142d404a4968.jpg


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  20. mozz

    mozz Well-Known Member Supporting Member

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    Radio antique show in Kutztown PA. today. Got some tubes for $1 each. Pair GE 12ax7's, pair GE 6bq5's, 7189, 10 various 6v6gt all old USA made, some 5y3's, 6sl7's, 6sn7's, Valvo ef86, 5881 (which test bad but i'm not complaining). 6112 (mini hearing aid triodes, good for pedals), 12ea7 (12v car dual triode, same pinout as 12ax7, good for pedals).

    Pickup up a Hellatone 60 for $25, i've heard of these speakers but never saw one or knew that they are really just Celestions v30's that are broken in for 15 hours. 16 ohm but i'll find a use for it. Peavey low impedance mic for $4, works. RCA NOS germanium 2n519's, pair for $1.

    Things i passed on:
    Bogen amp (minus tubes) for $20, i went back and it was gone. Some Peavey 15"speakers. Filmosound extension speaker $45 (probably a 16 ohm jensen) went back, it was gone. Lots of loose tubes in giant boxes, you'd have to spend the whole day digging.

    hell1.jpg hell2.jpg
     

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