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MNATS REV A |
REV A #101-125 |
REV AB #125-216 |
REV B #217-1078 |
NOTES |
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| GC AMP |
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| R37 |
470K |
560K |
470K |
470K |
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| R42 |
182K |
180K |
180K |
180K |
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| R43 |
38K3 |
47K |
47K |
47K |
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| R45 |
OMIT |
560K (Confirm) |
220K |
220K |
220K T&C Parallel
across R43 (47K), Combined value = 38K3 which is the value of MNATS R43. |
| R46 |
47K |
22K |
47K |
47K |
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| R47 |
44K2 |
47K |
47K |
47K |
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| R48 |
7K68 |
8K2 |
8K2 |
8K2 |
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| R51 |
4K7 |
8K2 |
4K7 |
4K7 |
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| ATTACK POT |
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| R54 |
470R |
620R |
1K2 |
470R |
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| C27 |
.022uF |
OMIT |
.012uF |
.022uF |
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| RATIO |
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| R58 |
180R |
3K9 |
180R |
180R |
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| R63 |
1K5 |
2K7 |
1K5 |
1K5 |
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| R22 |
56K |
56K |
47K |
47K |
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| R19 |
130K |
130K |
68K |
68K |
NOTE: If you're using the
great Hairball PCBs R19 is marked as R8 on the documentation |
| R78 |
JUMP |
JUMP |
47k |
47K |
NOTE: R78 is marked as R10
on Hairball PCBs |
| R64 |
2K2 |
1K2 |
2K2 |
1K5 |
Mnats listed 1K2 in PDF,
but is labeled 2K2 on board |
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| QBIAS |
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| R60 |
3K9 |
JUMP |
620R |
3K9 |
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| R85 |
JUMP |
JUMP |
1K |
620R |
To Rev B spec |
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| SIGNAL PRE-AMP |
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| R6 |
560K |
560K |
2M2 |
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Second
FET was dropped in REV B in favor of a 1 FET, 2 Transistor pre-amp |
| R7 |
560K |
560K |
2M2 |
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| R11 |
10K |
10K |
9K1 |
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| R12 |
1K |
1K |
2K2 |
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| C3 |
6.8uF |
6.8uF |
6.8uF |
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The schematic appears to
show 6.4uF here, 6.8uF is the nearest value |
| R16 |
47K |
47K |
100K |
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| C6 |
33pF |
35pF |
68pF (Parallel R7) |
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C22 was moved to R7 from
R16 on REV AB |
| R17 |
8K2 |
8K2 |
4K7 |
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| LINE AMP |
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| R31 |
OMIT |
OMIT |
3K9 |
10K (Confirm) |
This
mod adds a resistor (3.9k) in series with a capacitor (1000pF) and it should
be |
| C13 |
OMIT |
OMIT |
1000pF |
270pF |
connected from the (-) of
C9 to the junction of WHTRED - R32 (See Line Amp Mod
Diagram below) |
| C9 |
47uF |
6.8uF |
6.8uF |
OMIT |
Not sure where version 47uF
comes from, could be an oversite |
| C11 |
47pF |
47pF |
10pF |
10pF |
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| R30 |
120K |
120K |
150K |
150K + T&C Parallel |
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| GR METER NULL
ADJ |
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| R74 |
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1K |
1K |
JUMP |
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| R76 |
8K2 |
18K or 10K? |
18K or 10K? |
8K2 |
Need to verify 18K or 10K
for REV A,AB |
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Compiled by Mplancke
Dec/2009 |
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Modified Jan/2010, signal
pre-amp values added |
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Jan-09-10: Added Line Amp
values and more signal amp values per Neeno on Prodigy Pro |
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Jan-10-10: Added Rev A/AB
Ratio Board diagram, NULL ADJ Info revised |
| LINE AMP MOD |
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| RATIO BOARD
MOD |
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