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Magnavox A9304 amplifier project

I did a skirt on my scott that uses similar legs.
They elevate it and I measured and planned well enough that they Also use the factory screw holes. They run "front to back instead of side to side but otherwise same concept.
20210120_112846.jpg 20210120_112859.jpg

It looks better after finishing sanding and several coats of linseed oil. But you get the idea...
 
I think to be honest I probably boogered a cut and dealt with it by putting the taper on the legs. If I had it to do over I'd do the taper on the sides too.
So it would look-


\/_________\/

From the front.
Have fun, that's the important part.
 
trainbuftony said:
I think to be honest I probably boogered a cut and dealt with it by putting the taper on the legs. If I had it to do over I'd do the taper on the sides too.
So it would look-


\/_________\/

From the front.
Have fun, that's the important part.
Click to expand...

I have to be very careful with tapered cuts and angles it's hard enough just to get clean square cuts on my old blades ...

I did a shopping trip this morning for feed parts groceries and fuel I'm having total fit over the Sticker Shock everything was up again from last month...

I'm paying almost a 40% increase in animal feed costs compared to last year...

This is when feed costs should be lower not higher

The Fed says 8% inflation but obviously they aren't counting the same things I am...

At least I found the perfect handles @ Lowe's and not just more empty shelves...

IMG_20220613_120633.jpg

I'm thinking I should reduce my mad money budget for the foreseeable future...
 
trainbuftony said:
I did a skirt on my scott that uses similar legs.
They elevate it and I measured and planned well enough that they Also use the factory screw holes. They run "front to back instead of side to side but otherwise same concept.
View attachment 2591428 View attachment 2591429

It looks better after finishing sanding and several coats of linseed oil. But you get the idea...
Click to expand...
I gotta remember those legs when I make a new base for the 93xx Maggie.
I orginally used pine and stained ot since that's what I had on hand.
 
guitargrump said:
I made a little more seeable progress... The handles are on and the skirt is on permanently... Funny how much the skirt and handles change the appearance of the module... I like the results....
Click to expand...
Don, that looks great! I used the same style handles on my most recent amp build. Found 'em at the local junk store. They're bronze finish though, not silver.

I wish I had your woodworking skills. Of course, then I'd need an addition to my house make room for a wood shop.
guitargrump said:
you have a much better grasp of this stuff than I do... being able to combine multiple designs into something else is a skill I set I don't really have yet...

Fixing a circuit yes... copying a circuit yes... Adding the necessities to modify a amplifier to stand alone yes... More than that I'm still struggling...
Click to expand...
I wouldn't be so sure about that. My technical knowledge is quite limited and my "design" skills are negligible. I'm mostly just a copy and paste builder.

If you can copy one circuit, you can copy part of one and part of another and throw them together. If nobody has been crazy enough, or stupid enough, to try the combination before then you end up with something that's a bit different, that's all. No real "design" skills necessary.
 
yeah I'm not much good at "white sheet" builds either. Whenever I fool with stuff its a bit of this and a bit of that, usually leaning heavily on what it started with unless whatever it started as was completely useless. When I do have to make up something new, its pretty much just straight out of the tube datasheets for typical operating conditions.

the other reason I tend to not do much for scratch builds is I don't enjoy the layout process. I'm better at working within an existing chassis and basic layout to do what I need done. At least that way if its somewhat sloppy I can claim my hands were tied, rather than I completely forgot to consider something and had to jam it in as an afterthought.
 
Lavane said:
I gotta remember those legs when I make a new base for the 93xx Maggie.
I orginally used pine and stained ot since that's what I had on hand.
Click to expand...

Nothing wrong with pine. It's a good wood bug and weather resistant strong and flexible at the same time it takes stains well is affordable... I like pine...

The legs will allow bottom heat to escape is their other non structural design purpose...

@FlaCharlie
I believe that you are being a little modest and conservative about your talents... Knowing when and where to join two circuits is a very educated set of decisions... Having it works afterwards isn't just luck it's skills too... :)

Thank you... Dabbling in wood is something I enjoy I'm still trying to build a acoustic guitar that's actually playable... My skills with wood are more strong building house frames than precision instruments... But I keep trying to improve them there's always more stuff to learn... I am trying to get a actual wood shop together...

Don
 
gadget73 said:
yeah I'm not much good at "white sheet" builds either. Whenever I fool with stuff its a bit of this and a bit of that, usually leaning heavily on what it started with unless whatever it started as was completely useless. When I do have to make up something new, its pretty much just straight out of the tube datasheets for typical operating conditions.

the other reason I tend to not do much for scratch builds is I don't enjoy the layout process. I'm better at working within an existing chassis and basic layout to do what I need done. At least that way if its somewhat sloppy I can claim my hands were tied, rather than I completely forgot to consider something and had to jam it in as an afterthought.
Click to expand...

I still admire these skills of yours jamming everything in as a afterthought is my current main method still...

This rebuild was alot easier than the last one...

I'm putting the last one back on the bench and doing a few more things to it like a skirt and moving RCA jacks to the back panel...

There's always room for growth and improvement here...
 
Your discussion about handles on amps made me recall what a friend did for grabs on his amp a few years ago. I though it was clever. He used some pro type cabinet style grabs and cut them off. The installed the saved bit under and inside the ends of his wood wraps so he could grab under the ends but have fingers shielded from the electrical threats.

He used Penn-Elcom H1024 handles and cut the top half away. His post about it is here:
https://audiokarma.org/forums/index.php?threads/some-of-my-diy.397210/page-4#post-7052930

Thanks for sharing your project.
John
 
nerdorama said:
Your discussion about handles on amps made me recall what a friend did for grabs on his amp a few years ago. I though it was clever. He used some pro type cabinet style grabs and cut them off. The installed the saved bit under and inside the ends of his wood wraps so he could grab under the ends but have fingers shielded from the electrical threats.

He used Penn-Elcom H1024 handles and cut the top half away. His post about it is here:
https://audiokarma.org/forums/index.php?threads/some-of-my-diy.397210/page-4#post-7052930

Thanks for sharing your project.
John
Click to expand...
I remember that thread. I though that was a pretty clever way to keep fingers out of the exposed bits.
 
I finished the circuit checks earlier and am giving it it's first try...

So far so good everything is about as expected as long as I'm not pushing the top end too much the amplifier really sounds awesome...

Got some Freddy King playing via Bluetooth and he's sounding awesome...

Quiet no humm so I guess that I did okay...

No matter how many times I fix stuff the first time I turn on a newly repaired whatever... I'm a nervous wreck...

IMG_20220616_193602.jpg
 
thats kind of the down side to these things, they run out of power with less efficient speakers. I've got mine hooked up to my shop JBLs at the moment, sounds good, just cannot get loud or you find out where the power output stops.


Friend of mine had/has that same Maytag washer. It was the family backup for decades, whenever their automatic washer died, out came the old Maytag wringer washer. Not sure if he's still got it or not, he's moved a few times and its possible it got lost somewhere along the way.
 
gadget73 said:
thats kind of the down side to these things, they run out of power with less efficient speakers. I've got mine hooked up to my shop JBLs at the moment, sounds good, just cannot get loud or you find out where the power output stops.


Friend of mine had/has that same Maytag washer. It was the family backup for decades, whenever their automatic washer died, out came the old Maytag wringer washer. Not sure if he's still got it or not, he's moved a few times and its possible it got lost somewhere along the way.
Click to expand...

Ya I was deliberately pushing the amp to it's top end something I hardly ever do...

The speakers I used are the matching Magnavox console set that came with the amplifier so it was really loud I had to sit in a different room...

The Maytag washing machine is something I rescued from the scrapyard... My mom used one just like it... Good Memories...

The whole porch shop room is full of antiques that I'm using and or restoring the table is a Sears Silvertone console... There's a shuttle type singer treadle sewing machine... It's a mess of old treasures I do a little of everything...

IMG_20220617_121524.jpgIMG_20220617_121512.jpg

I managed to get the Maytag running it still holds water but the washer has since become a catch all full of shop scrap wire to be reused or recycled...
 
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