Messages

For 18 volts, just remove the charge pump, the 2 diodes in series offer protection and a slight voltage drop.

yeah awesome thanks for that -- yeah i thought that was right just to remove the 1054 looking at the schem, but wondering why it made an awful noise -- must have been the shitty power supply i was using.

i rigged up 2x 9v batteries to make an 18v plug and very happy to see absolutely no whine. now i just have to find a power supply that can give me clean 18v

thx again for you help

cheers

thanks for your replies

i didnt have a 33pf on my desk, but i did have a 27pf so i tried that, and it is a bit quiter, but it's still there.

i have an 18v psu from an old shaver -- when i remove the 1054 from the socket and plug in the 18 volts i get a really loud "meeerrrrrrr" so somethings not right -- maybe the 18v psu is rubbish. what brand psu do you guys like for 18v?

do i need to pull any other components from the baord if im going to use 18v?

cheers!

hi all,

just wondering what LT1054 you are using in the flintlock flanger??

the first one i tried had a really bad noise coming thru as a whine as the lfo sweep went thru (cant remember the brand as i binned it). the second one i tried was branded TI and much quieter, but now i'd like to get to much closer to 0.

ive got a ti branded lt1054 that says "TI(logo) 66L VFD LT1054CP" -- i guess it could be fake? or not the most ideal 1054?? ive seen there are 'analog devices' 1054 chips that are twice the price of the TI 1054 -- any chance this AD chip will be quieter?

alternately, can the charge pump be removed all together if we use the 3207? does the FF lose it's magic with the 3207?

cheers

thx again for your reply scruffie

yeah it was a faulty 4049

replaced it and we're flanging away.

thx for your assistance.

cheers, ulysses

thx scruffie

any chance you could send me a full voltages list?

CD4049UBE, pins 5+15 look low. maybe my 4049 is screwed.

you said my pin 12 on the CD4049UBE looks wrong -- did you mean pin 15?

thx

i did an audio probe on the MN3007

1. silence
2. a whining that modulates, presumably the oscillator. the front controls affect it's speed and depth etc
3. the sine wave i sent to "in" is heard
4. silence
5. silence
6. a whining that modulates, presumably the oscillator. the front controls affect it's speed and depth etc
7. silence
8. silence

are we sure the 1.3 board is verified? are there instructions specifically for the 1.3 board?

thanks

thx for your reply

i have soldered in the odd/even switch -- is that the one you mean? ive not boxed it up yet so no 3pdt switch yet.

i have the jack grounds wired up to one of the ground points on the board.

i have attached a pic of the board. C36 is on the underside of the board.

here are my voltages -- thx

PART SUBSTITUTIONS
3 diodes 1N5817 —> 1N5819

15V pad reads 13.6v when IC9 is socketed
15V pad reads 14.7v when IC9 is removed from the circuit

All Pots and Trimpots at 50% for IC voltage readings

IC1: NJM4558L
1: 6.55
2:6.55
3:6.00
4:0.00
5:7.96
6:8.02
7:8.02
8:13.05

IC2: NJM4558L
1:4.4
2:4.4
3:4.4
4:0
5:6.5
6:6.5
7:6.5
8:13.07

IC3: NJM4558L
1: 6.1~6.9
2:6.5
3:6.5
4:0.0
5:6.5
6:6.6
7:6.5
8:13.62

IC4: LM1458N
1: 2.14~12.7 (jumps between these two values — time between change 3 seconds)
2:7.33
3:3.5~11.0
4:0.0
5:6.5
6:6.5
7:3.5~11.0
8:13.55

IC5: CD4007UBE
1: 0.02
2:0.32
3:0.00
4:0.36
5:0.38
6:0.35
7:0.00
8:0.05
9:0.01
10:6.0~7.0
11:7.3~7.7
12:0.07
13:13.78
14:13.78

IC6: CD4047BE
1:13.73
2:0.08
3:7.2~7.6
4:13.78
5:13.78
6:13.78
7:0.00
8:0.00
9:0.00
10:6.86
11:6.87
12:0.0
13:13.72
14:13.79

IC7: 7815L
1:13.79
2:0.00
3:15.36

IC8: NJM4558L
1:5.48
2:3.7
3:3.7
4:0.00
5:6.66
6:6.67
7:6.2~7.1
8:13.74

IC9: CD4049UBE
1:14.12
2:5.8
3:7.08
4:7.07
5:7.04
6:7.00
7:7.06
8:0.00
9:7.00
10:7.03
11:7.01
12:7.02
13:0.00
14:7.08
15:5.87
16:0.00

IC10: MN3007 (SmallBear)
1:13.99
2:5.85
3:8.23
4:0.96
5:0.00
6:7.05
7:8.45
8:8.47

IC11: LT1054CP
1:4.47
2:3.9
3:0.00
4:0.00
5:0.00
6:5.0
7:4.4
8:8.96

IC12: NJM4558L
1:6.72
2:6.71
3:6.72
4:0.00
5:6.68
6:6.67
7:6.72
8:13.39

IC13: NJM4558L
1:5.4
2:6.71
3:6.69
4:0.00
5:6.65
6:6.71
7:6.71
8:13.37


Q1: 2N5457
G:5.4
S:6.7
D:6.7

hi all,

i built the flintlock flanger using the 1.2 instructions, but my board says v1.3.

i can't get it to flange al all. clean signal works fine. got my bbd from smallbear so should be fine.

anyone else built a v 1.3 board and have it work fine?

thanks, ulysses