A Collection of #124 Information (Schematics, Layout, etc.)

[rfrakes331k]

Can I get similar sounds out of a D Lite if I were to build one of those comparing the D Lite to the ODS 124?

[ic-racer]

Can I get similar sounds out of a D Lite if I were to build one of those comparing the D Lite to the ODS 124?

If you copy the #124 power supply and output section (ie four 6L6) then maybe it would be close. There is a lot of experience on these boards tweaking D Lites, but I don't think they wind up with values similar to #124.

[Structo]

Yes, quite a difference from two to four 6L6 tubes warmed up.

[lexluthier]

Dumb question, but is there a bill of materials list for someone who wants to build a #124 clone? I was going to go through the schematic and write it all down, but if there is a list that would be great. I tried the search function but there were so many results I couldn't find it.

Dave

[ic-racer]

I don't think there is an exact #124 BOM, because it may not be of that much use, as there are many unobtainable parts. I built mine from the pictures and scattered notes.

There are, however, a number of similar BOM's out there.

In case you have trouble finding them, I have attached one. It is not accurate to #124, but it is similar and it could serve as a good starting point (ie check it against the schematic).

[lexluthier]

Thanks!

[collinsamps]

Great stuff for us newbies ic-racer, thanks.

[ampman1961]

Wow...
I never thought I would get so much mileage out of those pics when I de-gooped 124, and Gil took the pictures. Amazing. I had a visit with 124 recently and retubed her...sounds very nice. Keep up the good work guys.
Billy Yates

[Structo]

No thank you Billy.
The photos and details were priceless.

[ChrisM]

Comparing the layout to schem. Seems there is a mixup maybe with the ratio/level pots. They are reversed on the layout/schem. Shouldn't the ratio be first in the signal path then level? Also the values and tapers done correspond.


EDIT: Also the schem shows the FET section getting power from B+5 while I see on the layout it getting it from B+ 4. I am reading this wrong?

[odourboy]

Comparing the layout to schem. Seems there is a mixup maybe with the ratio/level pots. They are reversed on the layout/schem. Shouldn't the ratio be first in the signal path then level? Also the values and tapers done correspond.


EDIT: Also the schem shows the FET section getting power from B+5 while I see on the layout it getting it from B+ 4. I am reading this wrong?

Hmmm... Agreed. Seems to me the labels on the 'Level' and 'Ratio' pots got switched. The FET board power is messed up also - swapping the cap+ and V1 plate wires with the V2 plate wire on the terminal strip lugs would straighten this out I think.

[ic-racer]

Comparing the layout to schem. Seems there is a mixup maybe with the ratio/level pots. They are reversed on the layout/schem. Shouldn't the ratio be first in the signal path then level? Also the values and tapers done correspond.


EDIT: Also the schem shows the FET section getting power from B+5 while I see on the layout it getting it from B+ 4. I am reading this wrong?

Hmmm... Agreed. Seems to me the labels on the 'Level' and 'Ratio' pots got switched. The FET board power is messed up also - swapping the cap+ and V1 plate wires with the V2 plate wire on the terminal strip lugs would straighten this out I think.

Good pickup. I don't have the original Layout file, otherwise, I'd change it.

[ChrisM]

Comparing the layout to schem. Seems there is a mixup maybe with the ratio/level pots. They are reversed on the layout/schem. Shouldn't the ratio be first in the signal path then level? Also the values and tapers done correspond.


EDIT: Also the schem shows the FET section getting power from B+5 while I see on the layout it getting it from B+ 4. I am reading this wrong?

Hmmm... Agreed. Seems to me the labels on the 'Level' and 'Ratio' pots got switched. The FET board power is messed up also - swapping the cap+ and V1 plate wires with the V2 plate wire on the terminal strip lugs would straighten this out I think.

Good pickup. I don't have the original Layout file, otherwise, I'd change it.

Can the current one be edit, or does anyone else have the original?

[David Root]

I'm still trying to get this straight in my mind.

1) Ratio pot precedes Level pot, yes/no?

2) Ratio pot is 100K Lin, yes?

3) Level pot is 250 K Lin, yes? (Or audio taper if you prefer).

[David Root]

I'm still trying to get this straight in my mind.

1) Ratio pot precedes Level pot, yes/no?

2) Ratio pot is 100K Lin, yes?

3) Level pot is 250 K Lin, yes? (Or audio taper if you prefer).