Thank you for the info! I might have to try this on a future amp to hide screws. Not that I can afford Tangos
Hint: I got the tangos used at a very decent price from a japan auction site... The seller noted that they worked but they did not sound good. Poor bass was one thing they said.
I took a chance and bought them anyway - Indeed the cores were magnetized so I de-gaussed them. Superb bass now!
Ian
Hint: I got the tangos used at a very decent price from a japan auction site... The seller noted that they worked but they did not sound good. Poor bass was one thing they said.
I took a chance and bought them anyway - Indeed the cores were magnetized so I de-gaussed them. Superb bass now!
Ian
did you get inductance readings before and after degaussing?
can you tell us how you degaussed the traffo?
According to my classification, 2 stage pentode amp in A1 with nested feedbacks is called Edelweiss.
Gubernator should work in A2.
Here is one more, 5W per channel. Military sweep tubes, were classified.
Interesting tube. Elements look different from any tube I know (but my experience is admittedly limited). I'm enjoying all the work you're doing!
I've always been of the belief that 1 watt or less is flea power... So with that I give you a sneak peek at my flea power build, 6SN7 in push-pull for just around 1 watt out.
Here's a few fuzzy progress pics-
More details in the link to the thread in my signature.
Hey Wavebourn, I might have to drop it off to you to run some measurements once it's done!
Interesting amp. How does it sound?
Thank you!
They are similar to Mazda Pen46. I suppose Raytheon and Mullard used own tooling and parts to get tubes with given properties, while Soviet plant used original Mazda blueprints.
i can get degaussers from a junked crt color tv's and monitors,
i just want to know how soulmerchant actually did it...
The classic way is, to bring AC voltage up until it saturates, then bring it down. Fast enough to avoid too high temperature, but slow enough to avoid magnetizing. But it is what happens when you play bass on full volume, below the frequency of the saturation point. TV de-gaussing is too weak for transformers.
Dario Miniwatt E188CC + PX25 KR Audio, rectifiers - AZ1 Philips Mesh Plates.
Toroidal power transformers (heater/anode separate), 10 sectioned chokes on amorphous core, LCLC for anode supplies, LCRC for the bias. Output transformers - also on amorphous core (AMCC400).
Mundorf Mtubecap for the supplies (4x100uF/550V + 4x47uF/600V), Shinkoh TAF resistors, decoupling caps are V-Cap Elite Reference CuTF 0,22uF.
CCS/VCCS + shunt PSU for PX25.
Input tube - SRPP with battery (fixed) bias, output tube - also with fixed bias.
Wiring - Neotech UP-OCC monocrystal solid core copper, solderless where it is possible.
The best amp I have ever made!
Toroidal power transformers (heater/anode separate), 10 sectioned chokes on amorphous core, LCLC for anode supplies, LCRC for the bias. Output transformers - also on amorphous core (AMCC400).
Mundorf Mtubecap for the supplies (4x100uF/550V + 4x47uF/600V), Shinkoh TAF resistors, decoupling caps are V-Cap Elite Reference CuTF 0,22uF.
CCS/VCCS + shunt PSU for PX25.
Input tube - SRPP with battery (fixed) bias, output tube - also with fixed bias.
Wiring - Neotech UP-OCC monocrystal solid core copper, solderless where it is possible.
The best amp I have ever made!
Attachments
In Bulgaria they believe in magic, like no FB, no capacitors, no solder, etc...
New amp is playing: 10W/Ch triode PP, class A1. The result of an experiment with driving 6S19P tubes.
https://www.facebook.com/Wavebourn/videos/1380727271985570/?hc_ref=NEWSFEED
https://www.facebook.com/Wavebourn/videos/1380727271985570/?hc_ref=NEWSFEED
Attachments
The sound is so much more natural without that lead solder
Sent from my phone with Tapatalk. Please excuse any typpos.
New amp is playing: 10W/Ch triode PP, class A1. The result of an experiment with driving 6S19P tubes.
https://www.facebook.com/Wavebourn/videos/1380727271985570/?hc_ref=NEWSFEED
Very nice, I enjoy to listen...
no wonder... Transylvania is around the corner there... the vampires sucked all the... solder from their tube amps! The only working protection is the tubes by Sylvania.
Very nice, I enjoy to listen...
Unfortunately iPhone compresses, but there was no tone change when I increased loudness to maximum.