Hi Sonny. I will take your and aboe's word for it and add 2 gain modules and a daughterboard to my existing order - might just as well go for it. So far I like very much what I have heard at aboe's place. I will send you 180 euro via Paypal.
Q Niels Grunnet
Q Niels Grunnet
Gain order
Oops. I think I got the pricing and the order wrong. I now understand, that the gain stages are instead of the discrete output stage, so I should also cancel my previous order and payment for a discrete output stage. That is, I need the DAC, 2 gain stages , 1 daughter board, 1 simple display --- does that sound correct?
If correct, how much do I owe you in addition to what I have prepaid so far. Sorry for the trouble. Niels
Oops. I think I got the pricing and the order wrong. I now understand, that the gain stages are instead of the discrete output stage, so I should also cancel my previous order and payment for a discrete output stage. That is, I need the DAC, 2 gain stages , 1 daughter board, 1 simple display --- does that sound correct?
If correct, how much do I owe you in addition to what I have prepaid so far. Sorry for the trouble. Niels
And me as well SonnyA, please reduce the to tal by the BAL discrete output stage I already paid for. I'll take the the XLR mode as well. Please send me a PayPal invoice as before. thanks...
SB
SB
Please also count me in for 4 gain modules and a daughterboard instead of the previously ordered 'normal' discrete output stage. Looking forward to try it out!
Naturally when I meant 'XLR mode', I meant the 4 gain modules and a daughterboard as well 😉
Thanks
Thanks
Comparison between Discrete output board V1.0 and Daughterboard with 4 gain modules
The filter setting on the Discrete output board V1.0 and the Daughterboard with 2/4 gainmodules are the same. The gain is the same, mute circuit also.
The only difference is the gain stages.
The discrete is a standard JFET input based amplifier running in class A in every stage. Output stage is a Singleended Class A with A current sink setting the Class A idle current.
The Gainmodules are JFET input based driving a folded cascode Transimpedance converter followed by a High quality buffer. So the gain is provided by the JFET only and therefore it is a true single gain stage design.
Distortion is very low despite the single gain stage.
I am not going to provide schematic or data on the modules, but if they break we will of course repair them.
The board has standard 2520 gain module pin out. So anyone want to use other modules than my design they can purchase the daughterboard for 126€/pcs. I know it is expensive but the sockets for the 2520 modules are not cheap.
BR
Sonny
The filter setting on the Discrete output board V1.0 and the Daughterboard with 2/4 gainmodules are the same. The gain is the same, mute circuit also.
The only difference is the gain stages.
The discrete is a standard JFET input based amplifier running in class A in every stage. Output stage is a Singleended Class A with A current sink setting the Class A idle current.
The Gainmodules are JFET input based driving a folded cascode Transimpedance converter followed by a High quality buffer. So the gain is provided by the JFET only and therefore it is a true single gain stage design.
Distortion is very low despite the single gain stage.
I am not going to provide schematic or data on the modules, but if they break we will of course repair them.
The board has standard 2520 gain module pin out. So anyone want to use other modules than my design they can purchase the daughterboard for 126€/pcs. I know it is expensive but the sockets for the 2520 modules are not cheap.
BR
Sonny
Sonny,
How much extra one needs to pay to switch gb/order from discrete to daughter card with gain modules?
How much extra one needs to pay to switch gb/order from discrete to daughter card with gain modules?
Hi Ravid
The difference is 195€ from discrete to daughter card with 4 x gain modules
And The difference is 55€ from discrete to daughter card with 2 x gain modules (SE)
The difference is 195€ from discrete to daughter card with 4 x gain modules
And The difference is 55€ from discrete to daughter card with 2 x gain modules (SE)
And what is the +/-15V analog supply requirement (current) for this new output stage. Previous switching AC-DC converter recommended was +5V, 3A, with dual +/-15V outputs at 500ma each. Is it still adequate?
Thanks
SB
Thanks
SB
Early bird
Including simple front panel + ADA4898 SE output board 326€ + shipping.
Including simple front panel + discrete XLR output board 425€ + shipping.
OleBull - Paid
Aboe (Mainboard with simple frontpanel and discrete outputstage)
Ryssen - Paid
Polytec (Mainboard with simple frontpanel and discrete outputstage)
CaféNoir (Mainboard with simple frontpanel and discrete outputstage) - Paid
Niels Grunnet (Mainboard with simple frontpanel and discrete outputstage)
Ravid
malarkey (Main board including simple front panel + ADA4898 SE output board) - Paid
Algar_emi (Main board including simple front panel + Daughterboard & 4 discrete modules output board) - Paid
Including simple front panel + ADA4898 SE output board 326€ + shipping.
Including simple front panel + discrete XLR output board 425€ + shipping.
OleBull - Paid
Aboe (Mainboard with simple frontpanel and discrete outputstage)
Ryssen - Paid
Polytec (Mainboard with simple frontpanel and discrete outputstage)
CaféNoir (Mainboard with simple frontpanel and discrete outputstage) - Paid
Niels Grunnet (Mainboard with simple frontpanel and discrete outputstage)
Ravid
malarkey (Main board including simple front panel + ADA4898 SE output board) - Paid
Algar_emi (Main board including simple front panel + Daughterboard & 4 discrete modules output board) - Paid
Early Bird
Inclusiv panoul frontal simplu + ADA4898 SE bord de ieșire 326 € + transport.
Inclusiv panoul frontal simplu + discret XLR de ieșire de bord 425 € + transport.
OleBull - Paid
Aboe (Mainboard cu panoul frontal simplu și outputstage discrete)
Ryssen - Paid
Polytec (Mainboard cu panoul frontal simplu și outputstage discrete)
CaféNoir (Mainboard cu panoul frontal simplu și outputstage discrete) - Paid
Niels Grunnet (Mainboard cu panoul frontal simplu și outputstage discrete)
Ravid
malarkey (placa principală inclusiv panoul frontal simplu + ADA4898 SE bord output) - Paid
Algar_emi (placa principală inclusiv panoul frontal simplu + daughterboard & 4 module discrete bord de ieșire) - Paid
Vitalica: placa principală + daughterboard & 4 module discrete bord de ieșire) - Paid
Inclusiv panoul frontal simplu + ADA4898 SE bord de ieșire 326 € + transport.
Inclusiv panoul frontal simplu + discret XLR de ieșire de bord 425 € + transport.
OleBull - Paid
Aboe (Mainboard cu panoul frontal simplu și outputstage discrete)
Ryssen - Paid
Polytec (Mainboard cu panoul frontal simplu și outputstage discrete)
CaféNoir (Mainboard cu panoul frontal simplu și outputstage discrete) - Paid
Niels Grunnet (Mainboard cu panoul frontal simplu și outputstage discrete)
Ravid
malarkey (placa principală inclusiv panoul frontal simplu + ADA4898 SE bord output) - Paid
Algar_emi (placa principală inclusiv panoul frontal simplu + daughterboard & 4 module discrete bord de ieșire) - Paid
Vitalica: placa principală + daughterboard & 4 module discrete bord de ieșire) - Paid
I got asked if i could provide discounts by selling more in 1 order on the Daughter-board for the Gain modules.
The Daughter-board is just as expensive for me to produce as the Discrete output board. I have made this board to be able to sell the gain modules.
So by providing the board at a of only 20€ with two gain modules and for free with 4 gain modules is already the discount I can give on the Daughter board + 2/4 gain modules.
BR
Sonny
The Daughter-board is just as expensive for me to produce as the Discrete output board. I have made this board to be able to sell the gain modules.
So by providing the board at a of only 20€ with two gain modules and for free with 4 gain modules is already the discount I can give on the Daughter board + 2/4 gain modules.
BR
Sonny