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ADA Preamps => Original MP-1 => Topic started by: Zsoli on February 27, 2014, 06:00:03 AM

Title: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on February 27, 2014, 06:00:03 AM

Resistors:
Stock

R1 ?
R2 ? ...

Capacitors
Stock

C1 ?
C2 ?  ...

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on February 27, 2014, 06:09:48 AM

resistors:      
      
R   1   10k 1/4w carbon film resistor
R   2   100k 1/4w carbon film resistor
R   3   100k 1/4w carbon film resistor
R   4   10k 1/4w carbon film resistor
R   5   100k 1/4w carbon film resistor
R   6   100k 1/4w carbon film resistor
R   7   100k 1/4w carbon film resistor
R   8   10k 1/4w carbon film resistor
R   9   240k 1/4w carbon film resistor
R   10   3.3k 1/4w carbon film resistor
R   11   620k 1/4w carbon film resistor
R   12   620k 1/4w carbon film resistor
R   13   750k 1/4w carbon film resistor
R   14   270k 750k 1/4w carbon film resistor
R   15   1.1k 750k 1/4w carbon film resistor
R   16   1.1k 1/4w carbon film resistor
R   17   430k 1/4w carbon film resistor
R   18   1M 1/4w carbon film resistor
R   19   510k 1/4w carbon film resistor
R   20   750k 1/4w carbon film resistor
R   21   270k 1/4w carbon film resistor
R   22   16k 1/4w carbon film resistor
R   23   100k 1/4w carbon film resistor
R   24   4.7k 1/4w carbon film resistor
R   25   16k 1/4w carbon film resistor
R   26   3.9k 1/4w carbon film resistor
:)

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on February 27, 2014, 06:10:44 AM

capacitors:      
      
C   1   10µF/450V (Radial electrolytic)
C   2   10µF/250V (Radial electrolytic)
C   3   0.0068µF/200V (polypropylene film)
C   4   100pF/1kV (polypropylene film)
C   5   0.015µF/200V
C   6   33µF/50V (Radial electrolytic)
C   7   33µF/50V (Radial electrolytic)
C   8   10µF/250V (Radial electrolytic)
C   9   0.0068µF/200V (polypropylene film)
C   10   0.0068µF/200V (polypropylene film)
C   11   100pF/1kV (polypropylene film)
C   12   33µF50V (Radial electrolytic)
C   13   33µF50V (Radial electrolytic)
C   14   2700pF(0.0027µF) 100V
C   15   0.01µF/100V
C   16   33µF/50V (Radial electrolytic)

:)

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: MarshallJMP on February 27, 2014, 01:31:29 PM

I attached the schematic

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on February 28, 2014, 03:00:16 AM

Thank You :)

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on March 26, 2014, 09:54:44 AM

Resistors
1/4 w? 1/2w? 1w?
 :banana-upsidedown:

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: MarshallJMP on March 26, 2014, 11:44:27 AM

1/4W

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on March 28, 2014, 05:49:11 AM

????????? :???:

mp-1 V1.xx pcb layout2.jpg:
R13 = 150k
R20 = 150k
C14 = 0,01µf
C2 = 10µf/450
C3 = 10µf/450

ADAMP1tub3of7.jpg:
R13 = 750k
R20 = 750k
C14 = 2700pf
C2 = 10µf/250
C3 = 10µf/250

????? :???:

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: MarshallJMP on March 28, 2014, 08:09:38 AM

R13 and R20 have always been 750k,never saw a unit with 150k.
C2 and C3 in the early units were 450V caps.Later they changed it to 250V

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Zsoli on March 28, 2014, 08:42:17 AM

Bad http://www.marshalljmpmodshop.net/mp-1%20V1.xx%20pcb%20layout.zip ?

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: MarshallJMP on March 28, 2014, 02:32:13 PM

seems that way.Altough these are scans from original ADA papers Jurrie collected over the years.

Title: Re: MP-1 Resistors Stock, Capacitors Stock (no mod)
Post by: Dna^Yay on May 10, 2014, 06:55:43 AM

R   14   270k 750k 1/4w carbon film resistor
R   15   1.1k 750k 1/4w carbon film resistor

so is it 270k or 750k for R14
1.1k or 750k for R15