You duplicated the PI with a 12ax7?
CW
Search found 1085 matches
- Fri Apr 26, 2024 10:43 pm
- Forum: Dumble Discussion
- Topic: #54 (photos)
- Replies: 46
- Views: 11257
- Fri Apr 26, 2024 12:50 pm
- Forum: Dumble Discussion
- Topic: #54 (photos)
- Replies: 46
- Views: 11257
Re: #54 (photos)
Again, I didn’t see this question. Sorry. No pictures that actually show the written value but it is a different cap than what is on the FET board. It looks 1uf to me.
CW
CW
- Wed Apr 24, 2024 4:46 am
- Forum: Dumble Discussion
- Topic: Bonamassa new amp day
- Replies: 31
- Views: 1540
Re: Bonamassa new amp day
OK let me clarify my reaction to that initial post. First of all I HATE "woke", "cancel", and for the most part social media, this site being an exception. Joe is a great guitarist and I enjoy his music. What I didn't like was the "Why Not?!!" when talking about buying an amp that probably was close...
- Tue Apr 23, 2024 4:46 pm
- Forum: Dumble Discussion
- Topic: Bonamassa new amp day
- Replies: 31
- Views: 1540
Re: Bonamassa new amp day
Yeah well, I’m thinking someone who can’t just own one of something great and enjoy it but has to own everything and tell everybody about is….a creepy scumbag.
CW
CW
- Sun Apr 21, 2024 5:14 pm
- Forum: Dumble Discussion
- Topic: Bonamassa new amp day
- Replies: 31
- Views: 1540
Re: Bonamassa new amp day
This is Ripper #189, hmm or maybe not. Different grill material on the head cabinet.
CW
CW
- Wed Apr 17, 2024 10:58 pm
- Forum: Dumble Discussion
- Topic: #54 (photos)
- Replies: 46
- Views: 11257
Re: #54 (photos)
Yeah I think I just can make out Z5U,25M,1kV.
CW
CW
- Wed Apr 17, 2024 10:04 pm
- Forum: Dumble Discussion
- Topic: #54 (photos)
- Replies: 46
- Views: 11257
Re: #54 (photos)
Hey, sorry I missed seeing this. Give me a couple and I’ll take a look at my photos. I think it is a pretty small cap, maybe 25pf but I’ll double check.
CW
CW
- Tue Apr 16, 2024 11:49 pm
- Forum: Dumble Discussion
- Topic: Tweedle Dee on Carter
- Replies: 35
- Views: 1598
Re: Tweedle Dee on Carter
Probably should clarify what is going on with the trimmer. B+ rail comes from filter to bottom terminal of 10k trimmer at the 100k and continues on to V1 off the bottom terminal. The 56k is on the wiper. I don’t know if the wiper and top terminal are jumpered but either way a variable resistance 56k...
- Tue Apr 16, 2024 11:19 pm
- Forum: Dumble Discussion
- Topic: Tweedle Dee on Carter
- Replies: 35
- Views: 1598
Re: Tweedle Dee on Carter
Actually, the other way around. From what I can see, this is the same circuit as Tweedle Dee #1. So... .02 couplers all around, stock PI resistor values, 10meg/.002uf LNFB, trimmer on plates not cathode and stock 56k/100k plate values, 1k cathode resistors on V1 and the 22uf filter caps. I really th...
- Tue Apr 16, 2024 10:48 pm
- Forum: Dumble Discussion
- Topic: Tweedle Dee on Carter
- Replies: 35
- Views: 1598
Re: Tweedle Dee on Carter
Am I going to ruin the fun if I tell you what the component values are?
CW
CW
- Tue Apr 16, 2024 4:14 pm
- Forum: Dumble Discussion
- Topic: Tweedle Dee on Carter
- Replies: 35
- Views: 1598
Re: Tweedle Dee on Carter
Edge came out in 2016
CW
CW
- Wed Apr 10, 2024 2:50 am
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 1175
Re: Choke Selection Question-Dumble Reverb
So an update on this now that it is wired up. There is a 31mA current draw on the secondaries which is going past the limit on my transformer. The other issue is that the filaments are sagging a bit even though I have a 1A filament winding. Talked to Phil at Heyboer, I really want to use the same cu...
- Thu Mar 21, 2024 6:15 pm
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 1175
Re: Choke Selection Question
... how much more current draw does the voltage doubler circuit put on the transformer? I'd say at least four times the DC current, but the waveform is spiky and will peak at a much higher value depending upon the DC resistance and reservoir capacitors. For this case I'm getting 65 mA peak and 25mA...
- Mon Mar 18, 2024 2:09 am
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 1175
Re: Choke Selection Question-Dumble Reverb
Hey look at that, thanks. The only thing that I wonder about is the 300VDC rating.
CW
CW
- Sun Mar 17, 2024 3:20 am
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 1175
Re: Choke Selection Question-Dumble Reverb
Although not a choke question, another interesting thing about this device is the little Triad transformer used as the reverb driver. It is a S-13X which has a primary of 25k and a secondary of 3.2 ohms driven by a 5751 tube. So a mismatch with the 8 ohm input of the reverb pan. Not sure if he was t...