Soldano slo100 AA electronics
- Thread starter Phil hodson
- Start date
Phil hodson
Well-known member
I ran AC1 and AC2 to the lamp and then took a feed from there for the heaters. For both pre and power tubes.
I’m guessing (and it’s only a guess!) That you would use AC1 and AC2 for the 6L6 and 12ax7 V3,V4 and V5, and then run the DC heater to the 12AX7 V1 and V2?? Proceeded with care
Most DC heaters I have seen have been running the pre-amp tubes only. So this might actually make sense.
I’m guessing (and it’s only a guess!) That you would use AC1 and AC2 for the 6L6 and 12ax7 V3,V4 and V5, and then run the DC heater to the 12AX7 V1 and V2?? Proceeded with care
Most DC heaters I have seen have been running the pre-amp tubes only. So this might actually make sense.
I think we're getting close. The only missing piece is a tag board to split AC1 and AC2. 2 lines to the DC mod pcb holes and 2 lines to the other v3, v4, v5, v6, etc.I ran AC1 and AC2 to the lamp and then took a feed from there for the heaters. For both pre and power tubes.
I’m guessing (and it’s only a guess!) That you would use AC1 and AC2 for the 6L6 and 12ax7 V3,V4 and V5, and then run the DC heater to the 12AX7 V1 and V2?? Proceeded with care
Most DC heaters I have seen have been running the pre-amp tubes only. So this might actually make sense.
Maybe run 3 of each, two to the board, and 2 each to run a parallel series for each set of tubes.
Just thinking out loud.
Phil hodson
Well-known member
Have a look at this pic. I think we are getting close too. Look at the green wires from the transformer and the lamp.
I ran the transformer AC1 and AC2 directly to the lamp. Then took a feed off this, one goes to V6,7,8 and 9 and then then another goes to V1,2,3,4 and 5. Linked with a bus wire between them.
I would think that wire it like this for V6,7,8 and 9 and also V3,4 and 5 and then run two wires from the PCB DC heater directly to V1 and V2 and link them together too.
I ran the transformer AC1 and AC2 directly to the lamp. Then took a feed off this, one goes to V6,7,8 and 9 and then then another goes to V1,2,3,4 and 5. Linked with a bus wire between them.
I would think that wire it like this for V6,7,8 and 9 and also V3,4 and 5 and then run two wires from the PCB DC heater directly to V1 and V2 and link them together too.
Phil hodson
Well-known member
Different pic.
Phil hodson
Well-known member
Check out some pics from
In the build section. There is a little description on some of them too. Helped me a lot.
C3 Amps - Soldano Kits, Transfomers, Chassis, Boards, Head Cabinets and Components
Soldano Amp Components: providing transformers - kits - chassis - boards and parts
www.c3amps.com
In the build section. There is a little description on some of them too. Helped me a lot.
I saw the build section. It does help. I'm pretty sure I could fake it till I make it, but I still wouldn't have understood it.
Now I understand and know what needs to be done. This is just as much an art project as it is an amp build. Now I have to figure out how to make it really pretty!
Thanks for posting your pictures.
Now I understand and know what needs to be done. This is just as much an art project as it is an amp build. Now I have to figure out how to make it really pretty!
Thanks for posting your pictures.
I see you grounded your heater wires at the pilot light. Is there a particular reason for the location? There is a lot of room so I can see why you might.
Also, I don't see any green wires to the power tubes. Where did you run that from and to?
Phil hodson
Well-known member
I did. That’s the Faux ground I needed. Kept it all neat. And no need for another bit of strip. I have also seen them done near the IEC too.
I ran a wire from the pre amp tubes down to the power tubes. I think you could do both though. One pair to the pre and one pair to the power.
I took a twisted wire from V5 under the board. To V7 and V8.
I ran a wire from the pre amp tubes down to the power tubes. I think you could do both though. One pair to the pre and one pair to the power.
I took a twisted wire from V5 under the board. To V7 and V8.
That's what I figured. I didn't see it in the pictures though. So you actually have 6 wires from the pilot. 2 to pre, 2 to power and 2 to the board, yes?
Edit: Now I understand, you have 4 wires, 2 to all the tubes in a series, routed under the board and 2 to the board.
Last edited:
Phil hodson
Well-known member
It’s 2 going to the pilot from the transformer.
Then 2 going to AC1 and AC 2 on the board. Then 2 going to V5 (pin 9 and pin 4/5)
They are all jumpers to the other pre amp valves. Then down to the power amp too.
So you would just connect V3,4,5 together.
And then the DC to V1/2.
Then 2 going to AC1 and AC 2 on the board. Then 2 going to V5 (pin 9 and pin 4/5)
They are all jumpers to the other pre amp valves. Then down to the power amp too.
So you would just connect V3,4,5 together.
And then the DC to V1/2.
devito
Member
Great work. You're correct that in the past year a lot of people built SLOs, I was one of them! Here's mine, the PCB was from Sirius Amplification in Australia. I absolutely love mine, probably my favorite amp of all time, I see why basically every high gain amp created after it was based on it! Cheers.
Phil hodson
Well-known member
Great work! Looks fantastic. That’s some dead straight wiring. Makes me want to re-do some of mine
devito
Member
Nah, yours is awesome!! I get solid wire straight like that by gripping one end with pliers and twisting the other end in a drill. Only a bit!Great work! Looks fantastic. That’s some dead straight wiring. Makes me want to re-do some of mine
owlexifry
Well-known member
Done!
Anyone who said this is not a good amp to build for a beginner was absolutely correct.
I did learn a lot and that was the point. Funny enough, it was the basics that got to me the most, proper solder technique, wire routing, etc.
Anyone solder 10 components perfectly. This had more than 600 solder points. Ugh!!
On another note, doing a pcb build with this many components is not quite as straight forward as doing a turret board build. Half the time I had no idea what the component I was working on was for. It's hard to look at the schematic and then figure out where that is on the pcb. Eventually I got the general layout in my head, but that was towards the end.
There were many other things I learned and the one that wasn't obvious to me was using aluminum anodized bolts and nuts.
Just don't do it. Looks cool, but not nearly robust enough, especially after removing them a couple times. It got to the point where if I had to unscrew something I automatically used a new nut and bolt.
Thanks to my new bro Phil Hodson for helping me out on this.
Gotta buy tubes and then break out the variac.
Anyone who said this is not a good amp to build for a beginner was absolutely correct.
I did learn a lot and that was the point. Funny enough, it was the basics that got to me the most, proper solder technique, wire routing, etc.
Anyone solder 10 components perfectly. This had more than 600 solder points. Ugh!!
On another note, doing a pcb build with this many components is not quite as straight forward as doing a turret board build. Half the time I had no idea what the component I was working on was for. It's hard to look at the schematic and then figure out where that is on the pcb. Eventually I got the general layout in my head, but that was towards the end.
There were many other things I learned and the one that wasn't obvious to me was using aluminum anodized bolts and nuts.
Just don't do it. Looks cool, but not nearly robust enough, especially after removing them a couple times. It got to the point where if I had to unscrew something I automatically used a new nut and bolt.
Thanks to my new bro Phil Hodson for helping me out on this.
Gotta buy tubes and then break out the variac.
