Jump to content

bancika

Established Member
  • Posts

    99
  • Joined

  • Last visited

  • Days Won

    1

Posts posted by bancika

  1. thanks guys :D

    I tried calculating it and get 113 windings...core is 60x6x3mm

    tweaking wire thickness for one 1/100th doesn't change anything important.

    It shouldn't make much of a difference anyway, speakers have always lower resistance than impedance (when I measured 8 ohm speaker it showed 7.2)

    Tomorrow I'll try to find some wire in local stores and get back to work.

    Cheers

  2. Thanks for replies.

    Can someone help with winding calculator. I'm not sure what are core dimensions and what are bobin dimensions? Also, what should I put for insulation diam?

    Here's pic of old pickup I cannibalized for the purpose :D I glued two L profiles on sides to make coil 3mm high.

    Link to photo

    Can I use universal transparent glue for potting coil? It's the only one I have here at the moment (except for super glue), it adheres to both metal and plastic.

  3. Hello,

    I've stripped one old single coil pickup for driver. Now is the time to wind it.

    one question: how should I determine when is enough with winding. Wire is lacquered so I can't measure resistance with DMM without stripping lacquer from it. Any suggestions?

    Tnx :D

  4. Yo!

    Another thought. What about using relays for switching? With three relays and only one DPDT on/off/on switch one could make switching sustainer on and off, phase switching and if you add another relay pickup switching (provided neck pickup exists). One pole would control DPDT relay for phase and second pole for other delay (either SPST or better) that will shut battery supply down when switch is in middle position. Pickup relay would be added in parallel with that relay.

    Relays aren't much more expensive than switches, but it's neat to have as few switches sticking out of pickuard as possible (at least to me) :D

    What do you think?

    Cheers

    PS Sorry if it has been discussed before :D

  5. Hello lads,

    Haven't started working on sustainer yet, I'm little short on $$ these days but I hopw it'll be soon. I begain quite interested in psw's driver/pickup combo. I could dissasemble (crappy) squier neck pickup and wind both driver and pickup there. My question is: pickup coil will be under driver coil. Does it affect pickup performace. Does magnet distance from string count or coil distance? Also, maybe it wouldn't be a bad idea to try dual coil design as psw suggested, with coils one below another. My question is, which winding direction should I follow for both coils?

    When I unwind pickup can I use same wire for winding pickup "part" of driver/pickup? Since pickup is crappy, can a wire be one of the reasons?

    As I understood, I'll need additional DPST switch for turning off pickup with sustainer is active, right? So it makes: one SPST for sustainer On/Off, one DPDT for polarity swap and DPST I mentioned?

    I'm beginer in electronics and utter beginer in sustainer theory, but I've been thinking a little about AGC "thing" and maybe someone can find it useful.

    In order to make string response more even maybe we could split whole frequency range on 6 zones and we'll assume that if tone of given frequency from zone 4 is played on 4th string. Zones could be determined statisticaly. I know that not all notes from one zone will be played on that note, but I consider that 50% hits is an improvement. With some combination of high pass/low pass filters input signals could be separated into 6 signals (one for each zone) and then set their level separately, mix them and then send to power amp. That way, we could amplify more notes that we assumed are played on thinner strings. What do you think about it?

    As for AGC and compression/inverting problem. What about one gain stage with trimmer that will amplify signal to, let's say, 1V. Trimmer will be there because pickup output range is between 80mV and 500mV so it should be able to amplify both weak single coil and some screamer hbucker to 1V. Then with some kind on hi tech mumbo-jumbo (maybe with clipping diodes, some of them clip at 250mV, some at 500mV etc) split signal into two or three signals: one below lower threshold that needs to be amplified, one above upper threshold that needs to be attenuated and maybe one in the middle that shouldn't be altered...after that just mix them and send to poweramp.

    I don't have a clue if any of this is possible, it's just how I see it :D And probably something like this has been discussed before.

    After all, this is "ideas" thread, little brainstorming can't hurt anyone.

    Btw, is 0.15mm wire ok for driver?

    Best regards,

    Branislav

  6. Hello,

    I joined "Tutorial" thread and was recommended to joint this monster thread B)

    I've tried to read last 10 or so pages, it's so hard to find stuff here :D

    Anyway, I've got a few questions:

    which is the last "official" circuit used to power driver. Is it still Fetzer/Ruby?

    I'm reading (mostly good stuff) about AGC but can't find what is it exactly?

    If I understood correctly, iron (Fe) does shield from EMI, so does shielding driver pickup help? I'll try to make one inside single coil cover, so I guess there will be space to insert iron cover around that won't be visible. If that's the case should I connect shield it to sustainter ground or guitar ground?

    What's the deal with split design. Is it just two separate coils? If yes, how should I drive them, using stereo amp or wire them in series/parallel and use them with mono amp?

    Thanks guys! :D

  7. Hello,

    I know there isn't enough space because I made guitar, control cavity is made just to fit guitar electronics, nothing else. Here's image of unpainter body.

    As for surface mounting, I don't hink its a problem. When testing it I can use shims to determine optimal height difference and just make it with slope afterwards.

    Because it's 24 fret guitar and I have neck humbucker I'm afraid it will be too far from middle of strings to be effective. I plan to keep neck pickup. When you say "completely remove neck pickup", I guess you are not just reffering to "use pickup combination that doesn't include neck pickup", aren't you?

    I was trying to read monster thread but it's very hard to dig through data there :D

    I've read build tutorial, but I'm still uncertain about one thing: can I use magnet core instead of iron core with magnet below?

    Thanks,

    Branislav

  8. Hello,

    I'm new to this forum and I'd like to try to make a sustainer. I think I have enough expirience making "things", I made electric guitar, tube amp, tube preamp and few stompboxes (if anyone is interested here's my site)

    Now I've got a few questions:

    I wouldn't drill through my guitar, instead I'd like to make it as external unit. It would have input from guitar (with short patch cable) and output for amp. Maybe it can be fixed to strap (but then I'd need longer wires to driver) or below driver (not so pretty). What do you think is better?

    If I make it surface mount to pickguard it should be very thin (about 4mm), could it be a problem for performace?

    And finally, the best place for mounting it without messing with pickups is next to my neck pickup, but towards bridge. Isn't that too far?

    Thank you all for making this possible!

    Cheers,

    Bane :D

×
×
  • Create New...