SSS #2 Started

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dreric
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Re: SSS #2 Started

Post by dreric »

Last of the lot:
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Eric
1949 Zenith, Zenith Toggle Recoil, Zenith 55 & 440
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aflynt
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Re: SSS #2 Started

Post by aflynt »

Amazing job!

-Aaron
Chad
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Re: SSS #2 Started

Post by Chad »

Fantastic job Eric,Hope she sounds better than it looks. Again wonderful job its been very educational to follow your work. Thanks, Chad
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Structo
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Re: SSS #2 Started

Post by Structo »

Looking better and better!

I've been curious about the circuit board over the tubes like that.

Is it tedious to solder the links from the socket pins to the board eyelets?

Also I wondered about having sensitive preamp components over the heater wires?
Tom

Don't let that smoke out!
talbany
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Re: SSS #2 Started

Post by talbany »

Structo wrote:Looking better and better!

I've been curious about the circuit board over the tubes like that.

Is it tedious to solder the links from the socket pins to the board eyelets?

Also I wondered about having sensitive preamp components over the heater wires?
Tom
As long as the heaters are run down near the chassis and the PCB board is stout enough to absorb the pressure applied by pushing and pulling tubes in and out it should be fine..
Dumble obviously prefered the sound (efficancy)of a PCB layout in the SSS model

Tony
" The psychics on my bench is the same as Dumble'"
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martin manning
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Re: SSS #2 Started

Post by martin manning »

Those are eyelet boards, Tony, and the tube sockets are mounted to the chassis. This construction is not unlike the non-traditional Express layout here: http://ampgarage.com/forum/viewtopic.ph ... 948#205948 No problems with hum in the two amps I have built with this type of layout.

Great project, BTW, Eric!
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dreric
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Re: SSS #2 Started

Post by dreric »

Structo wrote:Looking better and better!

I've been curious about the circuit board over the tubes like that.

Is it tedious to solder the links from the socket pins to the board eyelets?

Also I wondered about having sensitive preamp components over the heater wires?
Tedious ............... yeah but once I figured out the system it went pretty fast. I posted a series of photos on how I did it, the key thing was to keep the wire straight as you thread it through the hole then reach in with the needle nose and bend the wire just enough to get through the socket hole.

The one picture of the real #2 doesn't give much clue as to how HAD wired the heaters. I kept mine as close to the chassis as possible and tired to cross them on the perpendicular.

As to noise................ it will be a day or so before I'm ready to fire test. My fingers are definitely crossed on this one.

Eric
Eric
1949 Zenith, Zenith Toggle Recoil, Zenith 55 & 440
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dreric
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Re: SSS #2 Started

Post by dreric »

talbany wrote:
Structo wrote:Looking better and better!

I've been curious about the circuit board over the tubes like that.

Is it tedious to solder the links from the socket pins to the board eyelets?

Also I wondered about having sensitive preamp components over the heater wires?
Tom
As long as the heaters are run down near the chassis and the PCB board is stout enough to absorb the pressure applied by pushing and pulling tubes in and out it should be fine..
Dumble obviously prefered the sound (efficancy)of a PCB layout in the SSS model

Tony
Tony, Tom

I've spent a lot of time trying to figure out why HAD would build this amp with the methods he choose.

A builder famous for his tweaks................ fixed and hard to modify circuit board.

Size of the amp. While the ODS is tight the SSS is huge. I'm no expert on circuit board design but to my eye there seems to be a lot of wasted space in the SSS boards. The wire runs on the reverb are over a foot.........? Maybe I'm missing the logic.

It's just wild speculation but with the SSS and the Manzamp, I think HAD was playing around with designing comcercial products. But, what do I know..........

Eric
Eric
1949 Zenith, Zenith Toggle Recoil, Zenith 55 & 440
grtamp
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Re: SSS #2 Started

Post by grtamp »

Hi Dreric , your amp goes on very well , very clean wiring!
What type of reverb tank you will use?
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Colossal
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Re: SSS #2 Started

Post by Colossal »

Really great work Eric! A beauty to behold. Hope your power up goes smoothly.
talbany
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Re: SSS #2 Started

Post by talbany »

dreric wrote:
talbany wrote:
Structo wrote:Looking better and better!

I've been curious about the circuit board over the tubes like that.

Is it tedious to solder the links from the socket pins to the board eyelets?

Also I wondered about having sensitive preamp components over the heater wires?
Tom
As long as the heaters are run down near the chassis and the PCB board is stout enough to absorb the pressure applied by pushing and pulling tubes in and out it should be fine..
Dumble obviously prefered the sound (efficancy)of a PCB layout in the SSS model

Tony
Tony, Tom

I've spent a lot of time trying to figure out why HAD would build this amp with the methods he choose.

A builder famous for his tweaks................ fixed and hard to modify circuit board.

Size of the amp. While the ODS is tight the SSS is huge. I'm no expert on circuit board design but to my eye there seems to be a lot of wasted space in the SSS boards. The wire runs on the reverb are over a foot.........? Maybe I'm missing the logic.

It's just wild speculation but with the SSS and the Manzamp, I think HAD was playing around with designing comcercial products. But, what do I know..........

Eric
Eric
Who knows why HAD went this route on the SSS??..
Since he always used a PCB style layout on all his SSS's AFAIK my guess would be he preferred the sound of the more efficient PCB style layout and never looked back!!

IMO..Going from a standard eyelet board design to a PCB will have a more drastic effect on tone in an OD amp vs a clean amp..Not so drastic!!

Tony
" The psychics on my bench is the same as Dumble'"
CHIP
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Re: SSS #2 Started

Post by CHIP »

Supurb work Eric. Great documentation. Hoping your power up goes well.
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dreric
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Re: SSS #2 Started

Post by dreric »

Well ........................ passed the smoke test!

But........................ no sound :(

Weird.....................High pitched between a squeal and a hum barely audible but changes pitch as you move the master / level pot. Also changes pitch as you manipulate the bias pot.

I know that the squealing, loudly, can be reversed secondaries on the OT, could this be happening?? Thought as to where to start looking first?

Eric
Eric
1949 Zenith, Zenith Toggle Recoil, Zenith 55 & 440
talbany
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Re: SSS #2 Started

Post by talbany »

Ahh!! Now the fun stuff starts..

Eric PM me if you want!

Tony
" The psychics on my bench is the same as Dumble'"
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ic-racer
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Re: SSS #2 Started

Post by ic-racer »

dreric wrote:Well ........................ passed the smoke test!

But........................ no sound :(

Weird.....................High pitched between a squeal and a hum barely audible but changes pitch as you move the master / level pot. Also changes pitch as you manipulate the bias pot.

I know that the squealing, loudly, can be reversed secondaries on the OT, could this be happening?? Thought as to where to start looking first?

Eric
This is where I find it nice to have the in/out jacks so you can isolate the problem to either the preamp or the power amp.
"You feel like you're floating on a football field filled with marshmallows." -Dumble
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