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Messages - Motorola Minion

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1
RCA / Re: RCA console - lower and upper speaker enclosure
« on: August 18, 2017, 07:34:37 PM »
I just brought it home and teh model is 3VF516 - Sams 649, which I do not have but similar to a 1V646 in sams 632, that I have.  It was in a farmhouse basement addition and in perfect shape, no sign of dampness. Even the record player had a replacement needle with it but no paperwork. The original owner (deceased) had it in a daylight basement rec room and at least one neighbor recalls playing pool there and listening to it just a few years ago.

The folks who were holding it after the estate sale told me the radio worked good. It goes to show that a dry, stable environment and occasional usage seems to postpone capacitor failure. Never mind, Ill test tubes and replace caps before I power up ;), who needs to tempt fate.

2
RCA / RCA console - lower and upper speaker enclosure
« on: August 16, 2017, 02:18:57 PM »
Has anyone seen one like this? I bet Larry has. It is of the 1963-64 style, as opposed to the earlier non-multiplex FM sets. Its great to see the other variations posted in this forum.

I am picking this up Friday and cannot wait to see what's inside. Are there high-frequency speakers or horns in the upper part? I'll have to move some out and maybe donate others to make room.




3
Sightings / Re: CL 1966 Magnavox Imperial - Healdsburg /Windsor, CA
« on: August 11, 2017, 06:53:14 AM »
Somebody get this one - just the preamp capacitors is ll it needs.

4
Music / Re: Modern music and vintage consoles
« on: August 08, 2017, 02:45:49 PM »
Its great to have record knowledge here Ken. The Doors LP is tan, Elecktra label. Though played on Dual 1009 and 1019 using Pickering V15-III carts, it is worn out.

I may drop by my local record shop and pick up a new copy. It will cost over $20 but its worth it. I am reluctant to play my other long-time favorite LP's as they too are worn from the "record party" tours, mostly from the previous owners.

My newest restored '63 Motorola has its original Sonotone cartridge on the tone arm. A fairly clean Rhino re-issue of Todd Rungren's Hermit of Mink Hollow sounded just fine on it.

I use the vibrasonic sparingly with anything later than 1967 8), as the effect seems unnatural on later recordings.   

5
Magnificent Magnavox / Re: Grounding/Fuse-Link??
« on: August 08, 2017, 05:49:25 AM »
On second thought, if you use a grounded plug with MOVs from neutral and from line to ground inside your console's power supply - that is a great start. I am leery of cheap import surge-protecting power strips and the like. An electrical distributor is the source of commercial specification grade receptacles and breaker panel-mounted devices.

Anytime I restore an old tube radio, I add a grounded cord, Y2-rated safety caps from each side of line to ground and doubly caution the customer to disconnect the outdoor wire antenna.

Most of lightning issues on the TV bench were due to the 120 volt supply having an impulse looking for ground impressed on it. One sure path to ground was a shielded coax cable that is grounded, as required by NEC code, where it enters the premesis.

When applying SPD's (surge protection devices), the active component is an MOV (metal oxide varistor) that "clamps" high voltage impulses to less than 150 volts. And because current of said impulses is not sufficient to trip circuit breakers or open fuses, the MOV under extreme conditions, will short and destroy itself. The MOV in failure mode "shorts" and opens the fuse included in all SPD's, instead of allowing the full impulse to continue downstream to fry a diode or transistor.


6
Magnificent Magnavox / Re: Grounding/Fuse-Link??
« on: August 07, 2017, 04:03:02 PM »
I could not agree more with Greg.
Take it from a former TV repairman here, lightning can do some strange stuff and all the junk claiming surge protection is just that.

Just pull the plug or install a commercial-grade surge protector on your service panel and install a receptacle, also made for that purpose.

7
Console Tales / Re: There's Gold in Them There Hills
« on: August 07, 2017, 03:58:47 PM »
If you think Chet Atkins sounds great on that nice Astrosonic, try listening on an older tube console.  8)  Good luck, I hope you find an Imperial or Concert Grand next!

8
Magnificent Magnavox / Re: Magnavox Chassis R207-01
« on: August 07, 2017, 12:24:52 PM »
See newest download, Do you know what amp chassis you have? Id like to add that if I have it.

9
Magnificent Magnavox / Re: Magnavox Chassis R207-01
« on: August 03, 2017, 02:23:46 PM »
I has the Sams :D  It is not much like R204/211/215s I have been working on either. Look for it in downloads once I get it scanned.

10
Chat / Re: Gratitude for civility
« on: August 03, 2017, 02:20:57 PM »
I can't stand some of the snark on other forums. We all started somewhere and its a long journey down this rabbit hole.

If you have a junky unit and are a beginner, reality checks are in order but there is no room for boasting here.

11
Chat / Re: Thrift store finds
« on: August 03, 2017, 02:17:12 PM »
That's a great deal. I would have picked that up also. Its funny how "breadboarding" evolved later into those little white things we had in tech school. Maybe it was the sudden popularity of IC's. ???

About the right era for me but I never got one of those, oddly enough.  I only had the AM transmitter, much smaller "board" but with same spring terminals and symbols printed. Also had that little red perf-hole box kit with the crystal radio. Those predated these mid-70s 130-in-1 kits a bit.

12
Sightings / Re: eBay: Concert Grand Auction -- Medina Ohio
« on: August 03, 2017, 08:38:18 AM »
I would have been there already had it been closer. Lets hope it goes to one who appreciates it as is.

13
Wanted / Re: Magnavox Stereo Theater
« on: August 02, 2017, 02:05:39 PM »
Seeing something like you described Electra, I thought Id post this. I know its far away but maybe its "the one"

I'm pretty sure the Astrosonic receiver is a 30-watt with 6 speakers but the TV is COLOR ;D

Another forum I frequent is Videokarma. A long-time member from Idaho has a 1964 model Stereo Theatre. He is a TV tech, so the RCA-based color TV chassis is rock-solid. he says only the FM is a bit funky

14
You get A for effort on that record player, that is what SELLS consoles for me. These receivers are so easy to get the amps sounding like new, its a natural entry-level re-cap project. All you need to do next is change out the 16 caps vital to good sound. I have done three of these receivers to date and all came alive. I have a spare R204 receiver chassis, an it looks nearly the same as yours, top and bottom.

Attached you will find marked sketches you need to target relevant capacitors. Stay off the top of the chassis for now, everything to make the records sound awesome is underneath. The two C19 tag and C27 tag (output-to-speaker) coupling caps are MANDATORY replacements. If these have not failed yet, they will after the horns get pounded with the likes of Al Hirt's Trumpet, 'specially after its been sleeping. These are hard-wired underneath. Unless you have power supply hum or lacking on bass reserve power, don't bother with C1, 2, 3 and the others. Watch out, they are positive (can) ground.

Two non-polarized speaker crossover caps C20 and C28, are located at or near the horns. Non-polar caps are selected entirely by value and mostly, personal taste. Many audio guys will seek out special caps here. Madisound.com has a great website. You can go nuts on price with these with ClarityCap and Mundorf but Bennic Polypropylene and Carli mylar are just fine for the horn application here IMHO.

The most effort will be to unscrew and lift up the pre-amp/driver PCB. Use solder wick or other de-soldering tool and do one at a time, until all 12 are replaced. The PC board is well-marked and I advise taking a picture first to make sure polarity can be confirmed when done.

 

15
Magnificent Magnavox / Re: Magnavox Chassis R207-01
« on: August 01, 2017, 02:11:45 PM »
Ill check that number in my sets and upload to "downloads" - any Mag schemo is vital info and should be shared! :P

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