Magnovox Phono Console

[gadget73]

Both of those schematics are about the same. Neither has tone controls though, so its possible neither are correct. Thats what I was looking at without thinking about those tone controls.


Are those caps from the schematic, or verified in the unit?

33uf 35v should be fine for a 30uf 25v. The values on these things aren't super critical. The original tolerances were pretty wide.

 

[cademan]

The schematic above shows c7 and c10 as 10000mmf ?

Those will be the .1 @ 600 volt that you ordered.

 

[thaxman]

Beaknik, what are you going to do with the cab?

 

[Beatnik]

All the caps I ordered are from the unit, not the diagram. Hopefully my eyes saw everything correct now, didn't see that . in front of the 1. For some reason I was thinking 10000mmf was .01uf

thaxman, the cabinet is sitting in the garage. You want it ? I'm thinking if the amp turns out well I might pull the table.

 

[gadget73]

For some reason I was thinking 10000mmf was .01uf

It is.

 

[Beatnik]

I'm still searching, can't get the file to load.

 

[thaxman]

thaxman, the cabinet is sitting in the garage. You want it ? I'm thinking if the amp turns out well I might pull the table.

I have a SS Maggie amp & table. I have no use for them b/c the AUX are mono. But the cab they came out of is being transformed into a mid-level stereo/5.1/htpc all-in-one. If I like how it turns out, I plan to transform other unloved cabs here and there & see if I can make a buck.
I like the Maggies b/c the side-firing woofers free up room inside the cab. I have a friend who brings cars back from East Coast auctions. I'll have to ask if he likes to make detours.

 

[Beatnik]

Let me know and I'll hang on to it.

 

[Beatnik]

I'll get it loaded this way.

 

[Beatnik]

Just got back from radio shack, picked up an led 120v set up and also a 6v bulb (clearanced at .49) to mess with. They had 0.1uf 250v metalized-film caps so I grabbed a couple and am going to go ahead and solder in the coupling caps.

I guess these are ok ?
http://www.radioshack.com/0-1-uf-me...-capacitor/2721053.html#.VHdfG3W9_74&tab=tab1

Is a 6 amp switch ok for this ?

 

[wa2ise]

This is how I'd modify it, changes marked in green. I'd put a coupling cap between the input and the triode, and a 1 meg resistor to ground to bias the triode. If I recall correctly, you plan on using a set of volume and tone controls you already have anyway. So you can remove the ones in the amp. The balance pot is replaced by 22K resistors to ground.

 

[Arkay]

Looks like you're in good hands regarding the amp, so I'm just going to swoop in out of left-field blue skies to suggest...

Please don't just trash that Micromatic record player. I know it is hardly world-renowned hi-fi quality, but it's a good example of an era in audio history, and with a little TLC not the complete record-destroying hideous monster some might have you believe. Cleaned up and nicely mounted, even if it ends up more a vintage decoration than a piece of hi-fi, it should have a chance to live on.

Just a thought.

 

[Beatnik]

I'm keeping the tone controls right now.

As for the Micromatic, it has not been discarded and won't be. I haven't even drilled holes in the amp chassis or chopped wires, trying not to. Attempting to add pilot light and switch now without enlarging or adding holes.

 

[janikphoto]

This tube stuff is not real straight forward. I'm going to lose tone control if I take them out ?

Don't get overwhelmed... it's easier than solid state. Just rebuild it as-is and you can always modify it later.

 

[Beatnik]

Its like spaghetti.

It's also very low volume unless I have balance completely to left or right ? How do you clean the tube sockets ? I think I blew a tube jiggling it in the socket trying to get the one spot it sounded okay.

 

[Beatnik]

If I turn it off, swap out tubes turn it back on, sound follows the good tube. I don't understand the low volume unless balance pot is pegged to either side thing.

 

[Beatnik]

Also, the bass control does nothing audible to me ?

 

[wa2ise]

Also, the bass control does nothing audible to me ?

If your audio source is low impedance, it won't. What was the impedance of a ceramic pickup anyway? One could insert a pair of resistors of the equivalent resistance to simulate that impedance, and then the bass control should have an audible effect.

 

[cubdog]

Beat, can you tell me what you used to polish the chassis? Did you leave it mostly intact just covering the sockets or do something else? I need to clean my Maggie but I don't want to completely disassemble it.

cubdog

 

[knockbill]

Cub,
I think he posted the stuff he used earlier,,, I just did the same thing on a little RCA amp I'm working on and just used silver polish,,, It came out like his...

Regards,
John