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 Post subject: Magnavox Astro Sonic Restore
PostPosted: Jun Mon 04, 2018 2:29 am 
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this found me. i did not ask or want it to come to my QTH.

this is the most powerful Magnavox consoles i have ever heard. it will blow you out of the room. it is all stock, original, and completely untouched.

anyone have a good scan of a Magnavox console model 3RP658 perhaps from sams with all the alignment info, parts lists, and the usuals ?

does anyone have the 1965 to 1967 catalog that this appeared in ? some of the "chassis stickers" are dated 1965 and 1966.

although the model number of the whole unit is definitely 3RP658, I would like to know what it was called in the catalog as in "provincial" ; "imperial" ; etc.

any info, including (or where to locate) the schematic/alignment stuff will be appreciated.

the turntable model number is: W620 01-00 ; part number: 523698-1

thanks,

steve

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Last edited by Dutch Rabbit on Jun Thu 21, 2018 3:59 am, edited 11 times in total.

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 Post subject: Re: Magnavox Schematic Needed
PostPosted: Jun Tue 05, 2018 2:41 am 
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the sticker on the amplifier unit says Chassis #: A57502 AC ; 01/66 (date, I presume)

the number stamped on the tuner chassis in ink on the metal says: R207-01-20

steve


Attachments:
amp.JPG
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tuner-preamp.JPG
tuner-preamp.JPG [ 109.06 KiB | Viewed 4773 times ]

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 Post subject: Re: Magnavox Schematic & Info Needed
PostPosted: Jun Tue 05, 2018 3:19 am 
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pics


Attachments:
Magnavox  Stereo 3RP658 (1).JPG
Magnavox Stereo 3RP658 (1).JPG [ 145.74 KiB | Viewed 4770 times ]
Magnavox  Stereo 3RP658 (2).JPG
Magnavox Stereo 3RP658 (2).JPG [ 129.75 KiB | Viewed 4770 times ]
3RP658 (2).JPG
3RP658 (2).JPG [ 134.4 KiB | Viewed 4770 times ]
3RP658 (3).JPG
3RP658 (3).JPG [ 129.75 KiB | Viewed 4770 times ]
SAM_3411.JPG
SAM_3411.JPG [ 128.54 KiB | Viewed 4769 times ]
SAM_3401.JPG
SAM_3401.JPG [ 137.75 KiB | Viewed 4768 times ]

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 4:30 am 
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The 658 Sorrento was rated at 100 watts and with those big woofers it'll push some air. It dates to abt 1966. Yours is the Fruitwood finish. Nice find, luv those Maggies. :)
Here's the 2RP from the 1965 catalog. Note the difference in the turntable. The switch was made 1966/67 hence your 3RP version.

Image

Image

Larry

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 6:09 am 
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power ratings were often very inflated in that era, good bet its only abour 25 WPC RMS. Ive seen one console with single ended 7591's that claimed 40w per channel. The tubes would have melted if that was RMS. Although its not as bad as some car stereo speakers I recenly saw at Mall Wart that claimed 2000 watts, maybe for a millisecond.


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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 6:11 am 
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the key phrase is "music power' that meant it might hit 100 watts on very brief waveform peaks. And thats 50 per channel for a total of 100. still 15" woofers will move a lot of air, and it will get loud if the speakers are efficient. With efficient speakers only a few watts are needed.


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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 9:23 am 
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Your amplifier, thanks to Bill J.
viewtopic.php?p=2133729#p2133729

Tuner was covered by Sams Set-852 Folder-6 published in 1966
nothing on-line except for this 1964 factory manual for R207 series
https://www.ebay.com/sch/i.html?_from=R ... 1&_sacat=0

1. https://i.ebayimg.com/images/g/PBYAAOSw ... -l1600.jpg
2. https://i.ebayimg.com/images/g/XsgAAOSw ... -l1600.jpg
3. https://i.ebayimg.com/images/g/pKAAAOSw ... -l1600.jpg
4. https://i.ebayimg.com/images/g/fqUAAOSw ... -l1600.jpg
5. https://i.ebayimg.com/images/g/e~cAAOSw ... -l1600.jpg

https://www.samswebsite.com/en/photofac ... msid/852_6

Greg.


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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 12:15 pm 
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Olorin67 wrote:
power ratings were often very inflated in that era, good bet its only abour 25 WPC RMS.

Go back and read the spec sheet posted above. Maggies were not rated on peak power. The real over inflation took place in the 1970's causing the FTC to intervene, not the mid 60's.

Larry

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 4:22 pm 
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That console is a classic. Hopefully Magnavox switched to silicon transistors by that time---the ones that were all-germanium often have blown-up transistors

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 8:45 pm 
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egg wrote:


i got the amp sams from billj on the link, THANKS ! however, the amp shown in the schematic from billj has three electrolytic cans, my amp only has two.

so, that ebay manual is the one for my tuner ?

the knob and chassis diagrams in the book look the same as my chassis.

anyone have a copy of Sams Set-852 Folder-6 published in 1966 for the tuner ?

steve

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Last edited by Dutch Rabbit on Jun Tue 05, 2018 8:56 pm, edited 2 times in total.

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Tue 05, 2018 8:53 pm 
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tubes4life wrote:
That console is a classic. Hopefully Magnavox switched to silicon transistors by that time---the ones that were all-germanium often have blown-up transistors

what very little time i powered it up, and for being original untouched stock, it pounds like a drum.

and fresh capacitors will make it better ? :) i don't know how that can be, it is already a fantastic beast :!:

steve

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 Post subject: Re: Big Magnavox Restore, Motor Questions
PostPosted: Jun Sat 09, 2018 5:54 pm 
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i have the motor torn down and all the old oil has been removed from both bearings.

shall i use Zoom Spout as i did with my Alliance in the 1956 RCA SHF-5 that has been going strong since 2013 with no speed issues ?

any other suggestions for restoring this motor ?

also, the turntable model number is: W620 01-00 ; part number: 523698-1

anyone have/know where to get the TT service info for reference ?

the internet tells me it is in sams 848-5.

anyone have a pdf ?

shall I use lithium grease where the old was for the sliding clutches and such ?

thanks.

steve

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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Sun 10, 2018 12:25 pm 
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It's available on the Vintage Hi-Fi website. You have to join to download but it's free and there's quite a bit of Magnavox stuff on there. Once you join go to Downloads and then Magnavox. Scroll to the bottom and click on Turntables to find what you need.

http://vintagehifi.net/index.php

Larry

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 Post subject: Re: Magnavox Found Me, Any Info & Schematic Needed
PostPosted: Jun Sun 10, 2018 4:08 pm 
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Olorin67 wrote:
power ratings were often very inflated in that era, good bet its only abour 25 WPC RMS. Ive seen one console with single ended 7591's that claimed 40w per channel. The tubes would have melted if that was RMS. Although its not as bad as some car stereo speakers I recenly saw at Mall Wart that claimed 2000 watts, maybe for a millisecond.


That Maggie's rating is accurate, it is 100 watts per channel.


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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Sun 10, 2018 4:24 pm 
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With power rails of +/- 32 volts, 8 ohm speakers, and no output transformer, that would not be remotely possible.

-David


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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Sun 10, 2018 9:57 pm 
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rocketeer wrote:
It's available on the Vintage Hi-Fi website. You have to join to download but it's free and there's quite a bit of Magnavox stuff on there. Once you join go to Downloads and then Magnavox. Scroll to the bottom and click on Turntables to find what you need.

http://vintagehifi.net/index.php

Larry


great, i joined there years ago. i just got it.

thanks.

--100 watts, i'm sure it is at least 50, i did not measure it. i have only powered it a little bit and it shook the shop.

steve

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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Sun 10, 2018 10:52 pm 
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It's 50wpc, 100w total. I believe one of your pics above shows the output transformers?

Larry

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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Mon 11, 2018 1:47 am 
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yes, there are xformers on the amp board.

i too believed that when i saw the "B+" voltage of 32v on the collectors, it would be around 50 wpc.

solid state is not the standard part of my hobby, but i have restored and repaired enough vintage SS stuff to see 32v and it being around 40-50 watts.

steve

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 Post subject: Re: Magnavox Astro Sonic Restore, Turntable Help Needed
PostPosted: Jun Mon 11, 2018 2:36 am 
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I tore down the TT yesterday and cleaned all the gears.

today, I put it back together with new grease and oil.

it runs like a clock.

life is good.

now to order some capacitors in the near future and get on with the electronics.

steve


Attachments:
SAM_3461.JPG
SAM_3461.JPG [ 140.94 KiB | Viewed 4515 times ]

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 Post subject: Re: Massive Magnavox Astro Sonic Restore
PostPosted: Jun Mon 11, 2018 7:25 am 
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32 volts can indeed net you an honest 50 watts per channel. Nice to see you got the Micromatic going, and I'm glad you didn't have to replace the idler wheel

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