ODS Eyelet Boards

[martin manning]

In the .pdf's below are all-eyelet versions of the ODS PCB's and preamp eyelet board TAG member JBorders had made up for sale. The dimensions and mounting centers of those boards has become the "TAG standard" to which other members have had chassis fabricated for sale. They did not match any original Dumble ODS, and there were differences with respect to the (authentic) layout drawings posted on TAG by Tony Albany.

The original intent of the all-eyelet board drawings posted here was to enable a DIY replacement for the PCB and Preamp board set with the same overall dimensions and mounting centers. The preamp board closely matches Dumble's ODS component layout, so any important interactions will be preserved. The most notable differences are that all of the high voltage power supply filters are located on the main filter board, so the remotely mounted B+4 and B+5 filter capacitors seen in some layout drawings are not needed, and the bias supply circuit has two filters, as seen in later SN amps. Refer to the #183 layout drawing the for details of the B+ connections to the preamp board and the bias trimmer pot. The FET board layout required some rework for eyelet construction within the same dimensions as the PCB, but it has been proven to work well.

These eyelet boards can be configured for any ODS variant, including HRM and Bluesmaster using the small HRM EQ board. Note that OD and PAB relay connections for all variants are shown for OD "on" when the OD relay coil is energized. Some original amps were configured in the opposite way.

[xtian]

Very nice.

[dorrisant]

Yes... Very nice. Thank you Martin.

[Aaron]

Nice work Martin, thank you.

[M Fowler]

Thank you Martin.

[martin manning]

No trouble at all. A universal relay board has been added.

[dcribbs1412]

Thanks Martin

D

[stelligan]

Perfect timing. Thanks

[stiltamp]

Thank you very much for sharing the board layouts.

[martin manning]

Updated with relay connections for Skyliner OD/PAB, and corrected relay diode orientation. :^)

[alkuz1961]

[dcribbs1412]

Nicely done!
Thank you!

D

[stiltamp]

Thanks to all for sharing the eylet boards and the PCB-Layouts.

[amplifiednation]

Martin. Thank you for sharing this. The drawings are great.

[amplifiednation]

I draw up the eyelet boards in CAD. If anyone wants a set, let me know I'll get some made.