Rick Vito Dumble ODR

[Duble]

Rick Vito Dumble Overdrive Reverb

This is the only inside pic I have. Late double digit serial number.

[lovetone]

Wow, thats great thanks

I bet those tube bases's where difficult to solder in, do you have an image logging from the top?

Thanks again for posting

[Structo]

Do you know the serial number?

[martin manning]

Yes, very interesting. This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

[Aaron]

I've heard rumours about a point to point ODRS. Now that this has appeared it can be discussed.
Are those tantalums on the cathodes?

Aaron

[Structo]

Look like they could be.

Don't suppose he ever used the Soviet PIO caps did he?

[glasman]

Look like they could be.

Don't suppose he ever used the Soviet PIO caps did he?

Don't ever bet that he has not tried them. Its all about tone with him. I built a 100W tweed bassman-plexi amp with NOS US PIOs. Liked it so much I spent about 500 bux on the Soviet PIO's for future products.

I want to build a Tweedle Dum Dum with PIO's. It just might be like the breath of angels.

Gary

[glasman]

I've heard rumours about a point to point ODRS. Now that this has appeared it can be discussed.
Are those tantalums on the cathodes?

Aaron

Yup, those are tants.

[glasman]

Yes, very interesting. This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

You have to wonder if Alexander did the this method to further obfiscate the chassis to thwart cloners. Or if it simply had to due with picking up some more chassis area.

Sure would be a PITA to work on.

[glasman]

I've heard rumours about a point to point ODRS. Now that this has appeared it can be discussed.
Are those tantalums on the cathodes?

Aaron

Yup, those are tants.

[martin manning]

Yes, very interesting. This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

You have to wonder if Alexander did the this method to further obfiscate the chassis to thwart cloners. Or if it simply had to due with picking up some more chassis area.

Sure would be a PITA to work on.

Having built a couple of amps that way I like it from a component layout perspective, but you don't want to have to lift the board for repair. Looking at the other D photos showing separate boards for each tube that gets easier, and it seems HAD was going for a modular approach where he could mix and match the sections. It's interesting to see how his thinking has evolved from the now well-trodden ODS path. Modern two-sided through-plated pcb's can replace eyelet boards wrt easy component swapping so that is not lost.

[glasman]

Yes, very interesting. This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

You have to wonder if Alexander did the this method to further obfiscate the chassis to thwart cloners. Or if it simply had to due with picking up some more chassis area.

Sure would be a PITA to work on.

Having built a couple of amps that way I like it from a component layout perspective, but you don't want to have to lift the board for repair. Looking at the other D photos showing separate boards for each tube that gets easier, and it seems HAD was going for a modular approach where he could mix and match the sections. It's interesting to see how his thinking has evolved from the now well-trodden ODS path. Modern two-sided through-plated pcb's can replace eyelet boards wrt easy component swapping so that is not lost.

Remember the old Duncan Amps with the removable modules. Along the same idea.

The only issue when designing a PCB amp that I have found is designing in servicability. Best to make the through holes Wire Diameter x2, this way you can remove the part and be able to replace it with out having to remove the whole board. But I always socket the relays, they are electro-mechanical and WILL fail in time. In 12 years of building D- style amps I have seen exactly 3 relay failures. And that's enough to tell me a socket is important.

So in the end, if Dumble used PCB's, they must be ok. Anyway, the better quality components these days are designed for SMT or Through Hole PCB applications.

[Max]

This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

I've attached a picture of a DL 150W with holes in the preamp board.

And AFAIR the layout of the printed circuit boards used for the preamps of the Singers shown in some threads here at TAG it's an individual layout for every single Singer and isn't a result of a "modular approach".

Cheers,

Max

[martin manning]

This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

I've attached a picture of a DL 150W with holes in the preamp board.

And AFAIR the layout of the printed circuit boards used for the preamps of the Singers shown in some threads here at TAG it's an individual layout for every single Singer and isn't a result of a "modular approach".

Singers, yes, but I'm referring to this example: https://tubeamparchive.com/viewtopic.ph ... 985#352985

[hitchcaster]

This type of construction with the tube sockets accessed through large holes in the boards has only been seen in SSS amps here on TAG.

I've attached a picture of a DL 150W with holes in the preamp board.

And AFAIR the layout of the printed circuit boards used for the preamps of the Singers shown in some threads here at TAG it's an individual layout for every single Singer and isn't a result of a "modular approach".

Singers, yes, but I'm referring to this example: https://tubeamparchive.com/viewtopic.ph ... 985#352985

100uf filters on a 100w amp.... that's interesting 😎