So a year and a half later, after one failed attempt to have the preamp checked over I finally had someone from Audiokarma give it the once over. He fixed up some soldering issues and replaced a few dying capacitors.
He also sketched a circuit diagram for me which I wanted to post here for feedback and thoughts about possible improvements.
Thanks.
He also sketched a circuit diagram for me which I wanted to post here for feedback and thoughts about possible improvements.
Thanks.
Well I guess that 110 views and no suggestions means it is pretty much as good as it gets. 
That's cool, I'm just doing the usual "Isn't there something that would make it just a little bit better?" audiophile thing lol
I would even appreciate "Why the hell did they design it like that?" comments if those of you who have viewed were thinking that.
Anyway, Happy New Year everyone.
That's cool, I'm just doing the usual "Isn't there something that would make it just a little bit better?" audiophile thing lol
I would even appreciate "Why the hell did they design it like that?" comments if those of you who have viewed were thinking that.
Anyway, Happy New Year everyone.
The diagram don't make much sense to me..Well I guess that 110 views and no suggestions means it is pretty much as good as it gets.
Example: The cathode of V1-1 is floating at 108V via a 0.1u cap to a floating grid of V1-2 at 0V
Your chosen schematic is just written out poorly......we can see "he" started running out of room on the paper & started jamming on the remaining paper. Myself had I have run out of room....I would have started over.
It is not written up in the "classic" style of schematics....thus it is very hard to read.......a rewrite will clear things up immensely.
__________________________________________________Rick..........
It is not written up in the "classic" style of schematics....thus it is very hard to read.......a rewrite will clear things up immensely.
__________________________________________________Rick..........
That schematic was one provided by the company but that didn't seem to match what was inside the case at all.
You are correct that it has 6F2 and it also has 6N6.
I'm afraid I don't really get schematics (I have tried but my attempts were just not correct) so it may be that I can't give you guys enough to make your efforts worthwhile; sorry about that.
The schematic was a favor and honestly much better than I could ever have managed. The Ak'er spent a lot of time working on the unit to get it to work and did the schematic at the last minute so I cannot fault him for that.
Maybe it's just time for me to sit back and enjoy it and stop trying to understand and improve it
No worries, so the guy worked on the amp drew the pencil version based on what he saw in the preamp and that's what he came up with?! As drawn, the circuit does not work... but the one from the company does. Curious that's all...
I was the one that brought up the headphone amp before I saw the company's schematic, so please disregard it
Looking at the company's schematic, the P46 is a fully balanced design, from the input transformer to the push-pull 6C19 output stage. It employs GNFB (global negative feedback) to reduce distortion and improve linearity. Of course, this is just a generic description of the circuit, which probably does not mean much, anyway, how does it sound, and why do you want to "improve" it?
Always looking to improve, right? I mean, what's the point of living
It sounds fine, adds bass which was missing and seems to add almost no distortion to the system. It makes the CD worth listening to now.
I know, sit back, relax and be happy. I'm trying
Oh, apparently the balanced output isn't actually hooked up to anything, just the RCA's.
It sounds fine, adds bass which was missing and seems to add almost no distortion to the system. It makes the CD worth listening to now.
I know, sit back, relax and be happy. I'm trying
Oh, apparently the balanced output isn't actually hooked up to anything, just the RCA's.
Always looking to improve, right? I mean, what's the point of living
It sounds fine, adds bass which was missing and seems to add almost no distortion to the system. It makes the CD worth listening to now.
I know, sit back, relax and be happy. I'm trying
Oh, apparently the balanced output isn't actually hooked up to anything, just the RCA's.
You are right, we can't never leave well enough alone
I can't offer much help, since I had no hands-on experience with these tubes, the 6C19 in particular seems to be rather uncommon, and to use it in a preamp makes it even rarer.
Perhaps one of the experts will offer some advise, but it seems to me that this preamp was designed to drive very large power tube amps, that require a lot of power. And the fact, that the topology went from fully balanced to single end at the output is also a bit puzzling (at least to me), wonder what was the intention of the designer.
Jaz
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.