Hello and happy new year ! I own a KOSS/Drop ESP 95X and, as the Koss amp can originaly work with a simple battery pack (6x1.5V batteries), I was wondering if it could nicely work with a powerbank like this one that can deliver the 9V ? I guess voltage is ok but I was wondering if the bank...

Yesss ! You're right ! Comparing to my previous schematic, I reversed the R3/R9 and the opposite path connexions to the IRFs

There is no led on my version, here is my circuit drawing and photos of both sides : It's a double sided PCB with a ground plane on one side, 10x10 cm IRFs and tube sockets are mounted on the opposite side from the components side

Hello everyone I'm building another SS with a slightly redesigned PCB, basicaly a little smaller, and it doesn't work, the tubes don't glow and no sound or any noise comes from the headphones : the power supply delivers 48V, I checked resistor values, shorts, I checked and rechecked my circuit...

Hi I had the components in a drawer since 2009, the confinement gave me some time to complete this project ! So here are some pictures of the finished product The sound is nice but not impressive due to my old Sony CD1700 headphones : lack a bit of bass and too much highs, I tried with some...

Well, after a few thoughts, I remembered my iPhone's headphones were still in their box, so I sacrificed them :   by curiosity I cut the Apple monitors in half, the cable makes a knot inside it, so I cut the cable a little before to get a not twisted cable end   dismounted the Phonak...

Hi   I own PFE 112 since years, but the cable hardened during time and provoqued a bad connexion, a well known problem from first series I believe.   I contacted a few days ago Phonak at this email adress : Operations.Audeoworld@phonak.com, asking how to get a replacement cable, they replied...

Hi Here is my "system" on the shelf over my desk and monitors, simple, effective and costless as I already have some in stock since years :

Thanks for the answer. I will make photos and post a schematic of my SS. OK I wasn't aware that tube microphonics were such a « fatality », even if this tingling sound is beautiful in itself, I could just listen to it as I spent time listening to small bells hanging from budhist temples...

Hello everybody Finaly my first Starving Student is there ! It's based on the last evolution of the SS, with some changes due to the stock I had : C1-C6 : 2000 µF 50V C2-C4-C3a-C5a : 0.22 µF 100 V R14-R16 & R15-R17 : each pair replaced by a 56.2 K all resistors are metal 1%...

Have you tried Farnell ? Looks like they sell in Australia too…

Hello from Paris I usually buy my components from Farnell (they have a swedish site), Reichelt (only in german, but I manage to find what I want and order without speaking german) and Radiospares (swedish version too, in France, due to some law, they are restricted to professionnal customers...

Thanks for the infos Oops, good eye Dsavitsk, hum it seems I made some other mistakes… Still work to do… It seems ok now, maybe not very elegant design, but if it does work, I'm fine with it…

Hello I've received 10 identical tubes from TheTubeCenter, here is a picture : On the box : Pro/Comm Industrial grade electron tube Electron Tubes International Inc. On the tube : "19J6" in white near the top of the tube, in red around the tube : "CBS" "Made in USA" "DD"...

Hello everyone I'm drawing (on Adobe Illustrator) a PCB based on Millet's first schematic as shown on his site. I'd like to make the smallest circuit to insert in my preamp, so I don't need volume pot, headphone jack won't be mounted on the board, and the power for the SS will be integrated...