Engineered as a replacement driver for the Dynaco Mark III & IV as well as your own DIY monoblock, the diytube Poseidon uses a 12AX7 and a 12AU7 for pure triode perfection allowing use of an almost limitless selection of NOS and new tubes. This driver uses the classic modified Mullard topology with constant current source in the tail of the phase splitter - a perfect mix of performance and warm tube sound.
It is a bare driver kit without components meant for experienced tube hobbyists, including:
* FR-4 fiberglass construction that will last a lifetime
* top & bottom silkscreen ensuring easy assembly and friendly modding
* a ruby red solder mask finish that will never make your amp look like a science fair project
* a drop-in replacement with no other changes needed
* detailed schematics & a parts list with Mouser.com part numbers and easy cut-n-paste Mouser BOM
* email support provided and Poseidon forum
Most parts can be purchased easily through Mouser, and vendors are suggested for the others (ie tubes and tube sockets).
New Mark III with Poseidon (no parts supplied with PCB):
Manual:
Poseidon Manual for Dynaco Mark III and Mark IV Monoblocks
Ned Carlson's tubezone Poseidon Manual
Cut-N-Paste BOM (Bill of Material):
Poseidon BOM for Dynaco Mark III
Extra Parts - Poseidon Page Two BOM for Dynaco Mark III
Poseidon BOM for Dynaco Mark IV
Extra Parts - Poseidon Page Two BOM for Dynaco Mark IV
or
Poseidon BOM for Dynaco Mark III Mouser Direct Link
Extra Parts - Poseidon Page Two BOM for Dynaco Mark III Mouser Direct Link
Poseidon BOM for Dynaco Mark IV Mouser Direct Link
Extra Parts - Poseidon Page Two BOM for Dynaco Mark IV Mouser Direct Link
The parts list strives to be 100% inclusive for those building from a bare chassis.
Instructions for using 6CG7-types as the LTP and rotating the 12AX7
New Additions:
Full Original Dynaco Mark III Manual hosted at Dynakitparts.com
Full Original Dynaco Mark IV Manual hosted at Dynakitparts.com
Rev History:
7/1/12 - Updated Mouser Direct links for PCB parts for a couple back-ordered items. These supersede the manual parts list.
4/6/09 - Added Mouser Direct Links.
7/19/08 - I updated the full parts lists in the manual to match the BOM. Also updated the Triode Electronics lists. Added BOM texts for the second page of supplemental parts.
7/15/08 - Switched the 500k pot to the Bourns model which seems to be in stock more often.
12/9/06 - Slight update to the BOM. Changes the plate resistors to 3W, as 2W is out of stock. Should fit fine.
11/21/06 - Sprague .1uF/600V caps are out of stock. I can supply these four caps for $4 extra with any Poseidon order. Also, these are available at most tube resellers when you get your sockets.
7/20/06 - BOM only changes:
-updated the 1M resistor to be compliant with the Mouser database
-subbed the LM234Z for the LM334Z (RoHS backorder)
4/19/06 - MKIII only: Changed CCS set resistor to 10 ohms. Changed long tail pair plate resistors to 68k.
3/16/06 - Minor schematic fix for ref numbers. New octal suggestion.