Phil from Cimmaron Technology sent me a list of approved Opamps for
respective positions on the board of the EE Minimax DAC Plus; prices
include the Brown Dog Adapters provided by Cimmaron. I have been using
in the U1/U2 position the OPA2604 and in the U6/U7 position the OPA827.
I have not Opamp rolled this unit much, as I have been busied with other
components for review. I attest that the DAC Plus in SS output with the
tube removed and these opamps is sensational.
(NOTE CAREFULLY the warning at the bottom NOT to use the AD 8620 in the U1/U2 positions!) Also note that the positioning of the opamps/adapter is always with the small square solder point on the topside of the Opamp at the upper right hand when the unit is facing the installer. Finally, it is recommended that an opamp extraction tool and an anti-static device be used when removing/installing Opamps.
Is it "worth it"? Yes, emphatically, YES! :)
RECOMMENDATIONS OF OPAMPS FROM CIMMARON TECHNOLOGY:
For U1/U2
Single-channel op-amps mounted on the 020302 SO8-to-DIP8 single-to-dual
channel adapter:
qty 2 each required
020302-OPA627 $48.00 x 2 = $96.00
020302-OPA827 $38.00 x 2 = $76.00
020302-AD797B $48.00 x 2 = $96.00
. . . also for U1/U2
Dual-channel op-amps mounted on the 970601A SO8-to-DIP8 adapter
qty 2 each required
970601A-AD8620 $23.00 x 2 = $46.00
970601A-OPA2604 $13.00 x 2 = $26.00
970601A-OPA2134 $10.00 x 2 = $20.00
For U6/U7
Single-channel op-amps mounted on the 970601A SO8-to-DIP8 adapter
qty 2 each required
970601A-OPA627 $28.00 x 2 = $56.00
970601A-OPA827 $23.00 x 2 = $46.00
970601A-AD797B $23.00 x 2 = $46.00
The AD 8620 should not be used in the DAC PLUS.
"On some forum there was a suggestion to use the AD8620. for positions U1
and U2. While this is a dual op-amp, it is only rated to use up to
plus/minus 13 volts. The circuit in the EE Mini Max DAC and DAC Plus is
plus/minus 15 volts."
This post is made possible by the generous support of people like you and our sponsors:
Topic - Listing of Opamps for Eastern Electric Minimax DAC Plus... - Doug Schroeder 11:26:39 01/24/12 (55)
- Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - CKKeung 02:05:43 01/28/12 (12)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - Ric Schultz 13:06:26 01/28/12 (2)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - CKKeung 16:16:28 01/28/12 (1)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - Ric Schultz 18:03:07 01/28/12 (0)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - Bob_C 09:34:14 01/28/12 (6)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - CKKeung 09:37:20 01/28/12 (5)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - CKKeung 09:40:51 01/28/12 (4)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - Bob_C 10:07:41 01/28/12 (3)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - CKKeung 16:08:05 01/28/12 (2)
- RE: Newclassd (Dexa) Discrete Opamps & my EE Minimax DAC Plus - Bob_C 19:56:39 01/31/12 (0)
- Thanks Peter nt - Bob_C 17:53:47 01/28/12 (0)
- Discrete Op-Amps Problems? - Jon L 09:00:37 01/28/12 (1)
- RE: Discrete Op-Amps Problems? - CKKeung 09:34:41 01/28/12 (0)
- Op amps are OK there are much better circuits you could use. - Ric Schultz 18:16:12 01/27/12 (1)
- RE: Op amps are OK there are much better circuits you could use. - Bob_C 18:34:50 01/27/12 (0)
- RE: Listing of Opamps for Eastern Electric Minimax DAC Plus... - Bob_C 19:33:33 01/24/12 (39)
- I Went to Phil at Cimmaron Technology... - Doug Schroeder 11:03:34 01/25/12 (38)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 11:46:34 01/25/12 (37)
- LME49990 - Jon L 08:54:04 01/28/12 (6)
- RE: LME49990 - Bill O'Connell 10:53:30 01/28/12 (1)
- Thanks - Jon L 11:46:56 01/28/12 (0)
- RE: LME49990 - DAVID 10:11:10 01/28/12 (1)
- RE: LME49990 - Bob_C 10:21:54 01/28/12 (0)
- RE: LME49990 - Bob_C 09:28:37 01/28/12 (1)
- RE: LME49990 - Bill O'Connell 10:57:18 01/28/12 (0)
- RE: I Went to Phil at Cimmaron Technology... - rick_m 19:06:44 01/26/12 (10)
- RE: I Went to Phil at Cimmaron Technology... - Tony Lauck 10:47:18 01/27/12 (6)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 14:28:40 01/27/12 (2)
- RE: I Went to Phil at Cimmaron Technology... - Tony Lauck 14:39:22 01/27/12 (1)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 14:52:38 01/27/12 (0)
- RE: I Went to Phil at Cimmaron Technology... - rick_m 14:12:09 01/27/12 (2)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 17:56:36 01/27/12 (0)
- RE: I Went to Phil at Cimmaron Technology... - Tony Lauck 14:33:42 01/27/12 (0)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 19:18:18 01/26/12 (2)
- RE: I Went to Phil at Cimmaron Technology... - rick_m 20:04:42 01/26/12 (1)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 20:22:06 01/26/12 (0)
- You have little - fmak 05:44:21 01/26/12 (1)
- RE: You have little - Bob_C 09:05:32 01/26/12 (0)
- You Are Welcome To Make Your Own List... - Doug Schroeder 18:49:59 01/25/12 (12)
- RE: You Are Welcome To Make Your Own List... - Bob_C 20:49:47 01/25/12 (0)
- RE: You Are Welcome To Make Your Own List... - Bob_C 20:04:16 01/25/12 (10)
- Bob, I'm Pretty Angry At the Moment... - Doug Schroeder 08:02:56 01/26/12 (8)
- RE: Bob, I'm Pretty Angry At the Moment... - Bob_C 19:55:15 01/26/12 (7)
- Seriously, Bob, It Sounds Like You Are Quite Knowledgeable... - Doug Schroeder 06:53:29 01/27/12 (6)
- RE: Seriously, Bob, It Sounds Like You Are Quite Knowledgeable... - Bob_C 14:42:29 01/28/12 (5)
- RE: Seriously, Bob, It Sounds Like You Are Quite Knowledgeable... - Bill O'Connell 08:31:52 01/29/12 (4)
- RE: Seriously, Bob, It Sounds Like You Are Quite Knowledgeable... - Bob_C 11:16:19 01/29/12 (3)
- RE: Seriously, Bob, It Sounds Like You Are Quite Knowledgeable... - Bill O'Connell 15:56:43 01/29/12 (2)
- Thanks Bill nt - Bob_C 16:08:04 01/29/12 (1)
- RE: Thanks Bill nt - Nancy 01:37:34 01/30/12 (0)
- RE: You Are Welcome To Make Your Own List... - Ozzy 07:37:05 01/26/12 (0)
- RE: I Went to Phil at Cimmaron Technology... - Bill O'Connell 13:36:52 01/25/12 (3)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 14:33:42 01/25/12 (2)
- RE: I Went to Phil at Cimmaron Technology... - Bill O'Connell 20:34:24 01/25/12 (1)
- RE: I Went to Phil at Cimmaron Technology... - Bob_C 21:07:04 01/25/12 (0)