tcdk

Well.. the amp ain't working. Will try to poll-twist some of the capacitors, think it could be one of them. I can see at pictures of other Ruby's, that the 100uF capacitor on pin 7, is a ceramic type. The one I use is a electrolytic. Not sure if that would do any different?

I now finished my ruby amp (I think) Drawed an board-layout instead of using a hole-board, got the size down on 40x30mm I tried to connect a 9V batteri and a small speaker - but can't realy seem to find anything I can use as input to se if it works ? Any suggestions?

Yeah - I also see it as 40 ohm .. The bobbin is also not near full. Think I will buy some VERIFIED wire tomorrow (on a role, saying 0,2mm) I tryed with another vernier caliper (bether quality) and it showed more 0,1mm then 0,2mm The shop where I usaly buy my stuff, has a older owner, who can be pretty special.. He dosen't care if the parts he sells is right. So I think this wire is 0,1mm.. The other place - they don't know a **** - Im a electronic noob, but seems to know more about it than they does (They always ask me to search on theire computer to find the right part etc.) Just took a 1.5K ohm resistor (5% tolerance) and measured - it said 1.48K. That should be more than fine. Another thing - A friend of mine is a bassplayer. Anyone tried to make this sustainer for bass? Should there be any differens other than a little in the "pickup" ? When I get my own working, I think I will build one to him as a present! Sweet me (blarh) Now I will try to find some of my components around the house - had a little rush this morning, so coulden't clean up before leaving for work. When I got home that cats has been playing with my stash! Why diden't I leave the power on even though 12V isen't very much.

Hmm, I mesuared the wired to be 0,2mm, but I can break it just like breaking a hair. I now wounded 112 rounds to test the winding (112 rounds from the pickup-wiring calculator) and measured the ohms. Here is the result: And a picture of the wire:

Ok, will try with the BFW11 instead. This thin 0,2mm wire sucks! It breaks! almost when im at 60-80 rounds I have glued some acrylic on the bobbin to make it 3mm height. What I was talking about with the height, was the "pins" on the pickup. Should the be even height?

A little update. Drove to the nearest electronic-shop. He diden't have the J201 Jfet, but sold me an BFW11 instead: http://pdf1.alldatasheet.co.kr/datasheet-p...ROLA/BFW11.html How the heck do I connect that one? Thats one old bastard! What comon part, can I use instead of J201 ? With the same quality (Edit: I got some 2N5551 - would that do it?)

Hi all! I just started on a Sustainer project, and have some questions! 1: I can only seem to find lacquered cobber wire in 0,2mm - Will that work? or should the wire be unisolated (without lacquer) Here is a picture of the wire: 2: Would any ~5w amplifier do the job? or will you suggest building one ecxactly like eg. JEM ? 3: My "bobbin" has varius "pickup" heights. Take a look at this picture: Does this matter? Or should I cut down the height, so they will be equal height? Thanks for this endless thread!