Search found 950 matches
- Mon Mar 25, 2024 6:58 pm
- Forum: Dumble Discussion
- Topic: New Project
- Replies: 26
- Views: 890
Re: New Project
Hello -- My project is a single ended amp, so no PI. I don't know if I'll miss it since the Dumble power amp is pretty much a clean Hi-Fi type. It's a bit of an experiment, so I'll just have to see how it turns out. The preamp is a copy of my 100W low-plate, so it will be interesting to see how much...
- Thu Mar 21, 2024 1:54 pm
- Forum: Fender Discussion
- Topic: Can I use a Bassman 70watts PT and OT for a Deluxe reverb?
- Replies: 12
- Views: 476
Re: Can I use a Bassman 70watts PT and OT for a Deluxe reverb?
Hello — The simple answer to your question should be clear by now. Nope. Looking for a not-too-loud and early break-up sound. Buy a Deluxe or Princeton transformer set, plus a Princeton or Deluxe chassis; and follow more or less directly Martin Manning’s Deluxe build thread. Depending on goals and f...
- Tue Mar 19, 2024 9:29 pm
- Forum: Technical Discussion
- Topic: Heater Wires - Elevate or Twist?
- Replies: 18
- Views: 745
Re: Heater Wires - Elevate or Twist?
Series connected pairs run well on 12.6V.
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- Tue Mar 19, 2024 6:37 pm
- Forum: Technical Discussion
- Topic: ADA MP-1 schematic question
- Replies: 2
- Views: 129
- Tue Mar 19, 2024 1:21 pm
- Forum: Technical Discussion
- Topic: Flash seen from bottom of 12AT7 PI socket
- Replies: 22
- Views: 586
Re: Flash seen from bottom of 12AT7 PI socket
Do a search on “mullard triode flash” and read up about the wide observations that this is typical and believed benign.
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- Mon Mar 18, 2024 6:06 pm
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 827
Re: Choke Selection Question-Dumble Reverb
Don’t put too much into that particular spec ..
- Mon Mar 18, 2024 4:33 pm
- Forum: Fender Discussion
- Topic: Restoring a 1974 Deluxe Reverb - Seeking Advice
- Replies: 69
- Views: 2861
- Mon Mar 18, 2024 1:16 am
- Forum: Dumble Discussion
- Topic: Choke Selection Question-Dumble Reverb
- Replies: 16
- Views: 827
- Sun Mar 17, 2024 1:12 pm
- Forum: Fender Discussion
- Topic: Restoring a 1974 Deluxe Reverb - Seeking Advice
- Replies: 69
- Views: 2861
Re: Restoring a 1974 Deluxe Reverb - Seeking Advice
What is the ‘D’ node voltage with V1/V2 & V4 pulled? While sockets are empty can you add a static load temporarily to ‘D’ with 5W resistor at reasonable value (Ohm’s law) to hit a current target of ~10mA? What’s the voltage loaded? The goal being, 100% confirm "load" weakness somewhere in and around...
- Sat Mar 16, 2024 12:41 am
- Forum: Garage Talk
- Topic: What's for supper?
- Replies: 67
- Views: 2634
- Fri Mar 15, 2024 6:00 pm
- Forum: Technical Discussion
- Topic: Lowering B+ on Single ended amp with Choke input
- Replies: 9
- Views: 339
Re: Lowering B+ on Single ended amp with Choke input
Hello Guy -- Recommend you get set up to run simulation using http://www.duncanamps.com/psud2/ . A bit of learning effort. However, in my experience quite accurate and much easier to learn than Spice or other similar general tools. And yes, it's possible to both reduce voltage and improve B+ stabili...
- Thu Mar 14, 2024 9:55 pm
- Forum: Garage Talk
- Topic: What're you listening to right now??
- Replies: 1182
- Views: 346441
Re: What're you listening to right now??
Doubtless touch and go off topic for this spot, but no other alternative seemed obviously better.
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- Wed Mar 13, 2024 6:00 pm
- Forum: Fender Discussion
- Topic: Deluxe Reverb power transformer change?
- Replies: 16
- Views: 1163
- Tue Mar 12, 2024 12:32 pm
- Forum: Fender Discussion
- Topic: Restoring a 1974 Deluxe Reverb - Seeking Advice
- Replies: 69
- Views: 2861
Re: Restoring a 1974 Deluxe Reverb - Seeking Advice
Exactly so ..martin manning wrote: ↑Tue Mar 12, 2024 8:59 am Still don't understand why the preamp voltages are so high when the OT C voltage is pretty much spot-on. Is the value of the dropping resistor between B and C ok? C is also quite a bit high.
- Mon Mar 11, 2024 11:48 pm
- Forum: Fender Discussion
- Topic: Restoring a 1974 Deluxe Reverb - Seeking Advice
- Replies: 69
- Views: 2861
Re: Restoring a 1974 Deluxe Reverb - Seeking Advice
What’s the story between B & C? Seems the elevated potential begins there ..