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Author Topic: Headin' back to the 50's ... with a Bogen Lenco B50-16  (Read 16396 times)
kenwood61
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« on: May 25, 2020, 05:57:45 PM »

Bogen B 50-16
S/N#22993

Here is what it looks like now ...



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Here is what it looked like when I got it ...


Goal with this deck: To try out a vintage mono table and see if I like enough to collect a few mono LPs from the 50's and 60's.

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I have learned that once you have one or two turntables capable of delivering high quality sound, the idea of getting an old TT for mono play is intriguing. Especially when you can get a starter table for cheap.

Introducing my Bogen B 50-16 ... I just bought this yesterday on the auction site and don't know much other than the motor works, and the main bearing is leaking. I plan to pull the deck completely apart, service the motor (I've done this to two L75 motors), and get a metal idler wheel with new rubber. There are a few options there, but I have to decide how much I'm willing to spend on this table. I have no interest in swapping out the platter or main bearing and if the tonearm can be brought back to good condition, I'll keep it. I like the idea of keeping this original, but with new wiring, new paint job (or powdercoat), and custom plinth.

The seller doesn't know anything about the table, which leads me to believe they inherited the unit, or found at a garage sale. Who knows. But I can see a couple of things, including the broken power lever, which I'll want to replace, and I can't tell if the speed selector is supposed to have a handle on it.

Some of you saw my High Desert Goldring Lenco GL75 which turned out nice. I love playing records on a rock solid foundation. As some of you know, these B50's are more like toys in comparison. But I did have a B55 that was really a fantastic deck in stock form. I expect this will be a fun way to listen to the few mono LPs I have, and possibly push me to look for some more mono jazz LPs. I have some modern reissues in mono, but I'm not sure how much I might play those (pricey) copies on this table. It will depend on the cartridge/stylus I end up going with.

I can promise this project will be much simpler than my first Lenco build, and I hope to get this done within a month. It will depend on where I get the idler wheel and how I chose to finish the platter/top plate.

One question about the tonearm. I don't see any parts for sale online, other than the bakelite headshell (mine is broken). Jeff did a bang up job of that hot rod cherry red with Rek-o-kut arm swap, but if possible, I'd love to keep this as original as possible.

I have a nice Lenco L70/75 platter mat I may use. I need to see. That original mat would be nice, but I'm guessing it will be hard and brittle.

So my first question is proactive, considering I don't have the table yet. Does anyone have parts I may be interested in for this turntable they are willing to sell? Like the power selector switch? I'd be looking for excellent condition parts. Thanks!  

I did a partial clean to the top plate, but haven't touched the underside. You can see there is dirt and grime to be cleaned, but I think overall, the table is in better condition than I thought. For this reason, I am planning on NOT repainting it. I should be able to clean up the paint enough for it to be enjoyed as a piece of history. Plus, paint doesn't effect the sound quality.













The bakelite plug that screws into the headshell and plugs into the bakelite headshell is snapped in half. I would think this part can only come off a tonearm nobody wants.



Is it possible to refinish/polish the bakelite headshell? Mine has "stains" or spots all over it.



Messed up springs ... not that I need them ...

« Last Edit: March 12, 2024, 08:23:39 PM by kenwood61 » Logged

Matt

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« Reply #1 on: May 25, 2020, 08:58:43 PM »

That capacitor is a piece of art in itself cool
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kenwood61
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« Reply #2 on: May 25, 2020, 09:05:19 PM »

That will get pulled, tested, and "cleaned" ... I'm sure it's fine. I have never run across a capacitor like this that needed to be replaced, other than getting a modern smaller cap.
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Matt

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analogadikt
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« Reply #3 on: May 26, 2020, 03:09:31 AM »

No knob on the speed selector.

Pics for reference.

https://reverb.com/item/32656910-lenco-bogen-vp17-vp17x-turntable-alnico-5-speaker-w-ge-vr-ii-cartridge

Enjoy your new project smiley

Regards,
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« Reply #4 on: May 26, 2020, 03:41:41 AM »

That will get pulled, tested, and "cleaned" ... I'm sure it's fine. I have never run across a capacitor like this that needed to be replaced, other than getting a modern smaller cap.

Should be replaced with a modern safety rated capacitor. Not doing so is at your own risk.
https://www.lencoheaven.net/forum/index.php?topic=1927.0

A recent thread on the subject: https://www.lencoheaven.net/forum/index.php?topic=34342.0
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Chris

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kenwood61
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« Reply #5 on: May 26, 2020, 06:15:33 AM »

Thanks for the info guys! Very helpful.
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« Reply #6 on: May 26, 2020, 08:37:08 AM »

Hello Matt,

Quote
and I can't tell if the speed selector is supposed to have a handle on it.

The B 50-16 and former F 50-8 did not have a handle on the speed selector, that changed with the B 51, B 61 B 62 and L 70.

The platter mat might be glued on the platter.....

About the platter bearing leaking - there was no plastic cap yet and I believe the former owner just did not a 'good job' in filling the bearing with oil. I have several F 50-8 , B 50-16 and B 51 none of them do have problems with leaking bearings - proper maintenance will solve this....

If you need detail photographs of parts just tell me !

Kind regards
Max
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kenwood61
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« Reply #7 on: May 26, 2020, 04:00:28 PM »

Thanks Max, I just might ask. 
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Matt

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kenwood61
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« Reply #8 on: May 26, 2020, 04:07:26 PM »

Should be replaced with a modern safety rated capacitor. Not doing so is at your own risk.
https://www.lencoheaven.net/forum/index.php?topic=1927.0

A recent thread on the subject: https://www.lencoheaven.net/forum/index.php?topic=34342.0

I'm going to order caps today. I have an AR XA to finish up for my brother in law that needs a couple. For the B50, there are two caps, one at switch and one at motor. Now that I know I need a 3900 o r 4700pF (250 VAC/VDC or more, X2) for the switch. What size is on that motor? I think I see ".047  600" ...

Got it on the speed selector, thanks!

Power switch looks to be bakelite and have a lever coming off it, which looks broken on mine. I'll want to source a new lever on that if I can find one in really good shape. I had thought of sourcing some other switch, but I think I want to keep all the visual parts stock.
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« Reply #9 on: May 26, 2020, 05:12:09 PM »

Hello Matt,

one capacitor is enough. I remember seeing European B 50-16 have the capacitor on the switch while the US/Canadian ones have it on the motor. If I were you I would take a 4700 pF X2 type and if you install it on the switch use isolationg tape underneath the capacitor to have an additional protection against the metal part of the chassis - make sure to put it on the chassis, not on the capacitor.

Kind regards
Max
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« Reply #10 on: May 26, 2020, 05:22:04 PM »

I need to see what the power switch looks like, but it's easy enough to put on the motor ....

---

This is what I plan to order, unless you say different:  https://www.mouser.com/ProductDetail/Vishay-BC-Components/VY2472M49Y5US63V7?qs=YhDfSRCt1jRE3Sn2Z7aXgA%3D%3D

From what I can find, a ceramic disc capacitor is a "safety capacitor" and what Lenco used back in the day is a standard electrolytic, correct? Since these caps don't cost much (cheaper than shipping), I don't mind buying a few, but just want to make sure I'm picking the best. Mouser is where I buy my devices here in the States.
« Last Edit: May 26, 2020, 05:42:50 PM by kenwood61 » Logged

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« Reply #11 on: May 26, 2020, 06:04:04 PM »

Hello Matt,

Quote
what Lenco used back in the day is a standard electrolytic, correct?

Not really, in the 'olden' times capacitors looked different and some even looked like electrolytic capacitors but they are not.
What is clear that with the time the standard changed and so the used capacitors changed as well.

The one you selected is perfect !

Kind regards
Max
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« Reply #12 on: May 26, 2020, 06:11:40 PM »

Sweet! Good to know, thanks Max 
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Matt

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« Reply #13 on: May 27, 2020, 12:36:45 AM »

From what I can find, a ceramic disc capacitor is a "safety capacitor" and what Lenco used back in the day is a standard electrolytic, correct?
Not all ceramic disc capacitors are safety rated capacitors. The safety rating depends on the design & construction of the capacitor.
But yes, good choice for the one you selected.
The original looks like it could be a paper/wax style capacitor encased in plastic. They have a reputation for going 'bad' & a simple capacitance measurement doesn't tell you anything about how it will behave. Only a true high voltage capacitor tester will measure how good or bad it is.
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kenwood61
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« Reply #14 on: May 27, 2020, 12:59:04 AM »

Thanks Chris. I did a little research on the X vs Y safety caps and used the filter on Mouser to narrow down my choices.  afro
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