Search found 716 matches
- Thu May 09, 2024 2:46 am
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 6
- Views: 191
Re: ODS 102 with 2x KT88s and built-in Dumbleator
Not sure if I'd ever need to switch it in or out mid-song, great question to consider if it's worth putting on a pedal. The relay was used primarily to keep the wire runs shorter. My goal was to keep it as close to 102 as possible when the Dumbleator was not in use. The possibility of putting it on...
- Thu May 09, 2024 2:41 am
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 6
- Views: 191
Re: ODS 102 with 2x KT88s and built-in Dumbleator
I've used the dumbleator in both my Skyliner and the Delta amps I've documented here. The cap values are a little different than standard for modified filtering but the basics are very similar. They don't have relay switching but that can be easily designed in. Check out the Delta (183) for the mat...
- Wed May 08, 2024 1:15 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 6
- Views: 191
Re: ODS 102 with 2x KT88s and built-in Dumbleator
bcmatt I did a very similar build, if I were to put together a schematic of my build it would look nearly identical to what you pieced together. On mine the switch to select or bypass the Dumbleator is actually a relay. I did this mainly to avoid long signal wire runs to a switch. Where I was able ...
- Tue May 07, 2024 5:59 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 2
- Views: 80
Re: Can I Parallel 2 Mosfets in VVR?
So, like this?FUCHSAUDIO wrote: ↑Tue May 07, 2024 4:31 pm No reason you can't. I would add a 100 ohm series gate resistor on each, and also keep the 10 ohm source resistors on each, the input drain leads can simply tie to the same point.
- Tue May 07, 2024 3:43 pm
- Forum: Dumble Discussion
- Topic: ODS 102 with 2x KT88s and built-in Dumbleator
- Replies: 6
- Views: 191
ODS 102 with 2x KT88s and built-in Dumbleator
I'd like to convert another Traynor YGL-3a that I have to a #102 High-Plate Skyliner. It's already been modded a bit to take a couple KT88s. This is it currently: 20240504_140745.jpg YGL with KT88 screen VVR.jpg I'm first trying to theorize what a built-in Dumbleator in a #102 would look like and I ...
- Tue May 07, 2024 2:42 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 2
- Views: 80
Can I Parallel 2 Mosfets in VVR?
So, this is the regular VVR I use in Cathode biased amps: VVR.jpg If power handling is a worry and I'm worried about that MosFET, can I just add a second MosFET in parallel? Like this?: Parallel MosFET VVR.jpg Do MosFETs work like that, or does that screw up the circuit? I imagine that the heat diss...
- Tue May 07, 2024 12:27 pm
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Re: Traynor Biasing Questions and Pulling 2 tubes
Pretty similar to ODS. A branch from B+2 before the VVR could be used to supply the D'lator... I guess that's what you're thinking, and that's a proven approach. Since I'm not really sure what model I should use for a 2x KT88 ODS power section. I'll start by making a schematic with the current powe...
- Tue May 07, 2024 3:01 am
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Re: Traynor Biasing Questions and Pulling 2 tubes
Since this is going to be some sort of ODS conversion, I think it would be appropriate that I start a thread with my plan in the Dumble Discussion. This is beginning to become the wrong section for such talk.
- Mon May 06, 2024 10:30 pm
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Re: Traynor Biasing Questions and Pulling 2 tubes
Just looking at the actual power section of this YGL:
- Mon May 06, 2024 7:38 pm
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Re: Traynor Biasing Questions and Pulling 2 tubes
I want to forget about adding reverb for now... but am still obsessing about trying to build in a Dumbleator. I am maybe redoing someone's work, but I haven't found it exactly... so I messed around with Paint to theorize how one would add a dumbleator to a 102 circuit: 102 with Dumbleator Theorized....
- Mon May 06, 2024 4:27 pm
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Re: Time to Convert this amp more fully to an ODS
Since KT8K8 are beam tubes like 6L6, and the power amp is a clean Hi-Fi type, I don't think it would matter. That's what I figured. Mostly it's something like the 183 or HRM that get a little different. I'm getting a little mixed up keeping track of all the different models and trying to hear the d...
- Mon May 06, 2024 3:55 am
- Forum: Technical Discussion
- Topic: Traynor Biasing Questions and Pulling 2 tubes
- Replies: 44
- Views: 3355
Time to Convert this amp more fully to an ODS
I'm becoming quite happy with my other YGL-3a that was completely gutted and converted to an SSS... I'm feeling like this YGL-3a finally deserves a proper conversion to an ODS circuit. I'm thinking I'd like to keep it running these 2 KT-88s. It seems to be working well, with this VVR for the screen ...
- Fri Apr 26, 2024 5:57 pm
- Forum: Dumble Discussion
- Topic: SSS CF Driver Compression Questions
- Replies: 37
- Views: 1691
Re: SSS CF Driver Compression Questions
I just installed a slightly less comical looking 20k 5 watt dropping resister instead of these 2 in series.
I'm looking forward to running this all through its paces in a variety of settings to see if it's hype-worthy yet.- Thu Apr 25, 2024 4:37 pm
- Forum: Trainwreck Discussion
- Topic: Why did it take me 15 years to try a 12ay7 in my Liverpool?
- Replies: 8
- Views: 1192
Re: Why did it take me 15 years to try a 12ay7 in my Liverpool?
In the diagram the switch is set to fast ( higher gain) mode. https://ampgarage.com/forum/files/Express_pre_amp_variation.jpg OK, thanks. So I guess since I'm wired to the plate load being split, I'm in the lower gain mode as far as the plate is concerned. But mine's not that circuit otherwise, bec...
- Thu Apr 25, 2024 4:35 am
- Forum: Trainwreck Discussion
- Topic: Why did it take me 15 years to try a 12ay7 in my Liverpool?
- Replies: 8
- Views: 1192
Re: Why did it take me 15 years to try a 12ay7 in my Liverpool?
The resistor values are 82K and 22K. Yes, that's the values I currently have in there.. with no switch.. just hardwired in with a 0.005uF cap and a 150K resister to ground. The 82k is not visible in the picture because it is wired over the edge of the board right to the tube socket. 20240424_221042...