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 Post subject: Bell Amplifier Restoration Begins - Page 3
PostPosted: Jan Mon 07, 2019 3:41 am 
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I picked up this Bell amplifier this weekend. It was something that I just could not pass up. I love the style and everything about it. i had to dig very deep to buy it, but in the end, i am extremely happy that i did.

it fit my criteria these days: mint condition both inside and out and something that i could just not live without.

this will be summer 2019's restoration project.

steve


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Last edited by Dutch Rabbit on Jul Sun 21, 2019 3:49 am, edited 3 times in total.
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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 3:55 am 
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Location: Jackson, TN
That is a beauty Steve!

Looking forward to the restoration thread.

How do the indicators connect to the pots?

Tim


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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 4:03 am 
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thanks

the indicators connect just like a radio tuning shaft, a wheel wheel, and with dial cord.

i absolutely love this thing. that dial with all the indicators just "makes" it. it is not the average "box / cage" amplifier. the rounded edges, hammertone finish, and again...THOSE DIALS !!! they illuminate so beautifully too !

it was not local and i had to pick it up. we enjoyed a nice day out all day long on saturday.

steve

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 5:30 am 
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Nice score, Steve! I bet it'll sound very good once you're done with it. Does it use 6V6's or 6L6's?

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 6:33 am 
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hi william and thanks

it uses the infamous 6L6g.

this thing is almost too nice to touch. i will restore it as pristine as possible with full-fledged prozac level OCD under the hood.

it very well could be one of those "don't touch it and let it be" type of things. it is *that* nice.

however, it will be restored b/c i use my stuff. it is going to look beautiful sitting up on a shelf in my audio room that i plan to complete this year.

they bring a niiiiice price on ebay even beat up, but the condition, and well worth it, allowed me to pay more :oops: , but i just could not resist.

this would have been one of those "i did not buy it REMORSE" issues, as in kick myself in the hind-end for decades if i did not buy it 8) .

steve

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 7:19 am 
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what's the model number and can you post a schematic?
Can you show the underside wiring too?

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 4:12 pm 
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Cool amp, is it PA sytle used with mics ? Maybe for band use ? I wonder how many watts it puts out ?

Skippy


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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 4:24 pm 
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I love the "instrument panel." Congrats! I agree that it should be restored and used. On something like this I would re-stuff the FP capacitors but I wouldn't go as far as re-stuffing the tubular ones -- I have no problem with modern components under-chassis.

-David


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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 7:44 pm 
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Maybe 25 watts, maybe as much as 50 if it uses a driver transformer. Postwar, has miniature tubes. If there's a Sams folder, I probably have it - model number?

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 7:50 pm 
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How much do you call "digging very deep" ?
It's nice.. that's for sure but it's not like a stereo HI-Fi ... so what value... ?

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Mon 07, 2019 9:52 pm 
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Pbpix wrote:
what's the model number and can you post a schematic?
Can you show the underside wiring too?

model 3725b

the only schematic info that i've found on a quick internet search is that it is found in Sams Photofact 244-3. i confirmed this by finding an original sams print on ebay. it will be here soon.

in the meantime, does anyone have a good schematic/serivce info from riders, sams, etc. in digital form ?

i will do an underside pic soon.

steve

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 12:58 am 
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Nice Bell Sound System 3725B PA Amp.

I have several pieces of Bell Sound System HiFi equipment (mono + mux) that I have restored and all of it is very well made!

GL,

Terry


Last edited by radioterry on Jan Tue 08, 2019 1:26 am, edited 1 time in total.

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 1:03 am 
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Too small, but the forum only let me attach 800 x 600:

Attachment:
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Bell_3725.gif [ 100.32 KiB | Viewed 1543 times ]

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 3:29 am 
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mine is a 3725 B. i believe the "B" makes quite a difference in what the insides are. is the schematic for a "B" ?

i have never used a 6N7 tube. also, my amp has two smaller transformers plus the large power transformer. i only see two transformers in the schematic ?

tom, i will PM you with my email address. could you please email me a much larger file of the data ?

thanks.

steve

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 4:29 am 
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This is the 'B' version. Third transformer is the choke in the power supply. Will rescan tomorrow - I only saved the smaller version...

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 4:44 am 
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aaah, the choke.

thanks.

i will post a pic of the underside hopefully tuesday.

steve

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 5:15 am 
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Skip-wave wrote:
Cool amp, is it PA sytle used with mics ? Maybe for band use ? I wonder how many watts it puts out ?

Skippy

PA amp w/3 microphone and one phono input @ 25 watts.

BR,

Terry


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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 5:18 am 
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DR

These amps were mine. They sounded unfreakingbelieveable with enough power to blow the house apart. The
power trans blew on one of them. NOT A HAPPY CAMPER. I sunk several hundred into them.


https://www.youtube.com/watch?v=8E-_e_1EuWI


https://www.youtube.com/watch?v=BdTTADb693s


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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 7:37 pm 
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Dutch Rabbit wrote:
Pbpix wrote:
what's the model number and can you post a schematic?
Can you show the underside wiring too?

model 3725b

the only schematic info that i've found on a quick internet search is that it is found in Sams Photofact 244-3. i confirmed this by finding an original sams print on ebay. it will be here soon.

in the meantime, does anyone have a good schematic/serivce info from riders, sams, etc. in digital form ?

i will do an underside pic soon.

steve

Go here:
https://www.google.com/search?hl=en&biw ... ELK386QB6U

Radio museum:
https://www.radiomuseum.org/r/bellsound_3725_b3725.html

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 Post subject: Re: On the 12th Day of Christmas An Amplifier Came to Me
PostPosted: Jan Tue 08, 2019 10:02 pm 
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hello Arc,

i bet those amps did blow the roof off.

Peter,

i have the complete sams coming probably by the weekend.

here is a pic of the underside.

steve


Attachments:
under.jpg
under.jpg [ 123.29 KiB | Viewed 1450 times ]

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