your wet/dry mix stage is wired wrong.... look at a Twin Reverb schematic for the correct wiring
TT
Search found 609 matches
- Sun May 26, 2019 9:09 pm
- Forum: Technical Discussion
- Topic: Pedal Steel Amp - Troubleshooting
- Replies: 10
- Views: 843
- Thu Dec 06, 2018 1:53 am
- Forum: Marshall Discussion
- Topic: Dsl5c schematic
- Replies: 5
- Views: 2610
- Mon Nov 26, 2018 3:40 am
- Forum: Dumble Discussion
- Topic: High Plate Sky w/ Individual Bias pots
- Replies: 18
- Views: 1982
Re: High Plate Sky w/ Individual Bias pots
All my amps have bias adjustment for each tube... it's not a new thing. My last ODS 100W had a rotary switch and jacks to plug your volt meter into. The rotary switch allows you to toggle between power tubes. Overkill maybe but convenient!
TT
TT
- Tue Oct 30, 2018 10:07 pm
- Forum: Dumble Discussion
- Topic: Steel String Singer+Overdrive Reverb+Post PI Cathode Follower Hybrid thread
- Replies: 6
- Views: 1565
Re: Steel String Singer+Overdrive Reverb+Post PI Cathode Follower Hybrid thread
The JM Sig schematic posted on TAG shows the reverb being tapped before the 2nd stage. We are talking about the TwoRock amp, correct?
TT
TT
- Mon Oct 29, 2018 4:22 am
- Forum: Dumble Discussion
- Topic: Steel String Singer+Overdrive Reverb+Post PI Cathode Follower Hybrid thread
- Replies: 6
- Views: 1565
Re: Steel String Singer+Overdrive Reverb+Post PI Cathode Follower Hybrid thread
Your reverb send could end up with too much gain since your feeding it after V1B (series) instead of before it (parallel) as Dumble does....
TT
TT
- Mon Oct 08, 2018 2:43 am
- Forum: Technical Discussion
- Topic: Montgomery Ward 35JDR8421
- Replies: 18
- Views: 3500
Re: Montgomery Ward 35JDR8421
FYI it looks like there's asbestos in the amp shown in these pics. If this material is in your amp you should seriously consider removing from the amp and properly disposing it.
TT
TT
- Thu Oct 04, 2018 10:39 pm
- Forum: PCB Design
- Topic: PCB for 12V Relay
- Replies: 4
- Views: 6999
Re: PCB for 12V Relay
This is what I'm looking for....
- Thu Oct 04, 2018 10:37 pm
- Forum: Dumble Discussion
- Topic: Dumble Clone Parts: Who's Selling?
- Replies: 7
- Views: 1217
Re: Dumble Clone Parts: Who's Selling?
This is what I'm looking for.....
- Thu Oct 04, 2018 10:29 pm
- Forum: Dumble Discussion
- Topic: Dumble Clone Parts: Who's Selling?
- Replies: 7
- Views: 1217
Re: Dumble Clone Parts: Who's Selling?
My PT has two 6.3VDC taps so I'll get my relay voltage from those and use 12V for the filaments too....
I'm looking for the relay boards without the relays
TT
I'm looking for the relay boards without the relays
TT
- Thu Oct 04, 2018 1:48 pm
- Forum: Dumble Discussion
- Topic: Dumble Clone Parts: Who's Selling?
- Replies: 7
- Views: 1217
Dumble Clone Parts: Who's Selling?
Sorry for my ignorance but can anyone direct me to who if anyone is selling parts for Dumble clones, Dumble-Lite, etc?
- Thu Oct 04, 2018 1:40 pm
- Forum: PCB Design
- Topic: PCB for 12V Relay
- Replies: 4
- Views: 6999
Re: PCB for 12V Relay
Thank, looks like those will work in a pinch....
- Tue Oct 02, 2018 6:24 pm
- Forum: PCB Design
- Topic: PCB for 12V Relay
- Replies: 4
- Views: 6999
PCB for 12V Relay
Hi,
does anyone know where I could buy a few pcb's for a single relay? I believe the Dumble guys have boards for dual relays but I need a pcb for just a single relay.
Any suggestions?
Thanks!
TT
does anyone know where I could buy a few pcb's for a single relay? I believe the Dumble guys have boards for dual relays but I need a pcb for just a single relay.
Any suggestions?
Thanks!
TT
- Sat Sep 15, 2018 10:24 pm
- Forum: Technical Discussion
- Topic: Popping when amp put on Standby....sometimes
- Replies: 7
- Views: 716
Re: Popping when amp put on Standby....sometimes
I read about rewiring the standby switch to switch the screen B+ supply on and off which puts less stress on the switch too. Tried it and it works like a charm! No popping noises and amp is silent when in standby.... Lots of stanby switch replacements could have been avoided if Fender had does it th...
- Tue Aug 07, 2018 4:18 pm
- Forum: Dumble Discussion
- Topic: Relays: Solder or Socket? What's best practice?
- Replies: 4
- Views: 749
Relays: Solder or Socket? What's best practice?
Figured Dumble builders would be the best for answering this question. I have the first set of pcb's I've ever ordered coming this week. It's a three channel affair with three relays. I've used sockets for mounting relays on past builds but the pins seem so skinny and fragile that I'm worried about ...
- Tue Jul 17, 2018 11:24 pm
- Forum: Marshall Discussion
- Topic: JVM-1 Marshall Schematic (50th Anniversary)
- Replies: 7
- Views: 3782
Re: JVM-1 Marshall Schematic (50th Anniversary)
Hi,
I have a question about D4, D5, and C25 in the bias supply / DC supply (that feeds the TL072)
Why are D4, D5, and C25 in this circuit? D3 should be able to supply all the rectification needed...
Please explain if you can....
Thanks,
DB
I have a question about D4, D5, and C25 in the bias supply / DC supply (that feeds the TL072)
Why are D4, D5, and C25 in this circuit? D3 should be able to supply all the rectification needed...
Please explain if you can....
Thanks,
DB