Search found 995 matches
- Mon Apr 09, 2012 4:17 am
- Forum: Technical Discussion
- Topic: +9V/0V/-9V DC power supply
- Replies: 18
- Views: 4104
Re: +9V/0V/-9V DC power supply
I knew you guys would come up with the goods! Thanks for the tips. I'll look around a bit at the solutions you are suggesting.
- Sun Apr 08, 2012 3:21 pm
- Forum: Technical Discussion
- Topic: +9V/0V/-9V DC power supply
- Replies: 18
- Views: 4104
+9V/0V/-9V DC power supply
Hi, all, This is likely beneath most of you, but I can't think of a group I'd rather send this question out to. I have an old Raven Labs preamp, and the power supply finally died. I can use batteries in it, but I'd rather use a power supply if possible. The supply has a 300ma rating, but it doesn't ...
- Mon Mar 19, 2012 9:32 pm
- Forum: Dumble Discussion
- Topic: EVM-12S?
- Replies: 10
- Views: 4372
Re: EVM-12S?
I have both speakers. The 12L wins out a little on clean tones to my ears, particularly in the high end. The 12S wins out overall.
...but then I'm really leaning more toward G12-65's anyway.
...but then I'm really leaning more toward G12-65's anyway.
- Sun Mar 11, 2012 6:02 am
- Forum: Dumble Discussion
- Topic: 102 Feedback City
- Replies: 264
- Views: 37214
Re: 102 Feedback City
I swear I remember somebody suggesting that Tony plug the pre output into a different amp to see if the amp still behaved the same way, which I thought was a really interesting idea. I just skimmed this thread again for the first time in 2 weeks, and didn't see...Tony, did you do that?
- Thu Jan 26, 2012 4:57 am
- Forum: Technical Discussion
- Topic: Homemade power tube retainers?
- Replies: 14
- Views: 3759
Re: Homemade power tube retainers?
...here's a pic of a Hot Cat with a shock-insulated clamp. Looks a lot like the clamp for a multi-section canister cap -- a variation of the hose clamp idea above. My Bad Cat had these, too. I think you're right about them being the clamps for caps. The red part on mine was a layer of felt. Not ver...
- Sat Jan 21, 2012 8:06 pm
- Forum: Dumble Discussion
- Topic: Quinn goes PCB
- Replies: 104
- Views: 13927
Re: Quinn goes PCB
I own a Glaswerks Zingaro now. PCB-based. Man, this is a nice amp and a killer value. Done right, I guess there's absolutely nothing wrong with using PCB's. But I bet you've got to have the technical know-how to pull it off, not just look for the easiest layout and go for it. Thanks for the nice co...
- Thu Jan 19, 2012 5:57 pm
- Forum: Dumble Discussion
- Topic: Quinn goes PCB
- Replies: 104
- Views: 13927
Re: Quinn goes PCB
I own a Glaswerks Zingaro now. PCB-based. Man, this is a nice amp and a killer value. Done right, I guess there's absolutely nothing wrong with using PCB's. But I bet you've got to have the technical know-how to pull it off, not just look for the easiest layout and go for it.
- Tue Dec 20, 2011 9:57 pm
- Forum: Technical Discussion
- Topic: Best compromise screen R for 6L6 and EL-34 operation
- Replies: 15
- Views: 4202
Re: Best compromise screen R for 6L6 and EL-34 operation
I've got 1K in mine and have swapped back and forth with 6L6 and EL34s. They both sound great. I haven't noticed any loose low end. My experience is that you may not notice it until you try. Then all of a sudden you think "Wow, that's been giving me some problems in some venues." It's not dramatic,...
- Tue Dec 20, 2011 8:44 pm
- Forum: Technical Discussion
- Topic: Best compromise screen R for 6L6 and EL-34 operation
- Replies: 15
- Views: 4202
Re: Best compromise screen R for 6L6 and EL-34 operation
measure the voltage drop over the screen resistors More importantly, what is the screen voltage compared to the plate ? If it's a 'high plate' D-style where there's a large difference between then screens and plates, then yes you can get away with very small screen resistors. If the screens are at ...
- Tue Dec 20, 2011 3:40 pm
- Forum: Technical Discussion
- Topic: Best compromise screen R for 6L6 and EL-34 operation
- Replies: 15
- Views: 4202
Re: Best compromise screen R for 6L6 and EL-34 operation
Thanks, all, I'll try a couple of the lower values and see if anything catastrophic happens.
- Sun Dec 18, 2011 8:48 pm
- Forum: Technical Discussion
- Topic: Best compromise screen R for 6L6 and EL-34 operation
- Replies: 15
- Views: 4202
Re: Best compromise screen R for 6L6 and EL-34 operation
Heh, it does beg. But the mean is not always the best compromise, hence the question.mhuss wrote:This begs the obvious question: did you try 1k?
--mark
I'm basically looking for the "how low can I go" question, since to my ear that sounds better for the 6L6 types.
- Sat Dec 17, 2011 9:01 pm
- Forum: Technical Discussion
- Topic: Best compromise screen R for 6L6 and EL-34 operation
- Replies: 15
- Views: 4202
Best compromise screen R for 6L6 and EL-34 operation
I have a fixed bias D-style amp that is currently wired for 6L6s using 470ohm screen resistors. I'm interested in making it also able to run EL-34s. Trouble is that putting 1.5k in there is fine for the EL-34s, but seems to make the 6L6s sound kind of poorly-defined in the bass. Anyone had good luck...
- Sat Dec 17, 2011 6:59 pm
- Forum: Technical Discussion
- Topic: 2-conductor shielded with teflon?
- Replies: 4
- Views: 1384
2-conductor shielded with teflon?
Anyone have a good source for low capacitance teflon shielded with two conductors in it? Looking for something that can stand up to soldering better and can do there-and-back runs from controls to the board.
Thanks!
Thanks!
- Tue Dec 13, 2011 3:37 pm
- Forum: Dumble Discussion
- Topic: PAB comparisons
- Replies: 27
- Views: 5914
Re: PAB comparisons
Thanks for the suggestions. I have a Glaswerks Zingaro in the house, and I was surprised at how little I care for the PAB as implemented there (it's not Gary's design, it's Dr. D's). But it's a little trickier to experiment on a PCB-based amp.
- Tue Dec 13, 2011 2:08 am
- Forum: Dumble Discussion
- Topic: PAB comparisons
- Replies: 27
- Views: 5914
Re: PAB comparisons
Resurrecting this thread...because I'm interested in the feedback, too.
In particular, trying to see if the way the D'Lite does it with half of a relay is about the same as the way #183 does it, which sounds nasal and not all that useful to me.
In particular, trying to see if the way the D'Lite does it with half of a relay is about the same as the way #183 does it, which sounds nasal and not all that useful to me.