Hi! I finished my first diy some months ago and was happy just to hear my G7 working, sounding really nice and musical. Its got a strong bass, which i liked from the beginning (and still like), but I now think it lacks higher freq, which makes it sound a little dull. A friend of mine who also has built a g7 said that his had much more higher freq. (We couldn´t compare side by side because his was broken.) I have read the metas and only found problems regarding lack of bass. Which of these suggested problems, if any, do you think is the most probable reason for the lack of HF, or do you think it is something else? (I´m using Gustavs boards and akg ck12 capsule.)
1. The tube (using an NOS telefunken ef86, and I got no more ef86 to compare with). But from what I understand it is usually the bass that dissapears when a tube is bad. Or?
2. I used a Black gate bi-polar Nx-series 680/35v electrolytic cap instead of a 100u/35 v, first without the parallell 1u cap, and then I put in a 1u polypropylene cap, but high end still lacking. This is of course something I could test myself by putting in a 100u/1u, but I thought I could ask first if this could matter at all since I had a REALLY hard time to make those big caps fit.
3. The power outlet here in sweden has 230v but i used a 220:9v transformer into a 230:15v transformer, instead of what I guess should have been 230:9 into 220:15. I have with no mic connected 180v for the HT, which I guess is a little high(?).
Thank you for any help in pointing me in the right direction where to start. While I wait for your answers i go back to my first full range speaker diy!
//Martin
1. The tube (using an NOS telefunken ef86, and I got no more ef86 to compare with). But from what I understand it is usually the bass that dissapears when a tube is bad. Or?
2. I used a Black gate bi-polar Nx-series 680/35v electrolytic cap instead of a 100u/35 v, first without the parallell 1u cap, and then I put in a 1u polypropylene cap, but high end still lacking. This is of course something I could test myself by putting in a 100u/1u, but I thought I could ask first if this could matter at all since I had a REALLY hard time to make those big caps fit.
3. The power outlet here in sweden has 230v but i used a 220:9v transformer into a 230:15v transformer, instead of what I guess should have been 230:9 into 220:15. I have with no mic connected 180v for the HT, which I guess is a little high(?).
Thank you for any help in pointing me in the right direction where to start. While I wait for your answers i go back to my first full range speaker diy!
//Martin
