Search found 758 matches
- Sun Jan 08, 2023 12:32 am
- Forum: Fender Discussion
- Topic: Fender Reverb Values
- Replies: 12
- Views: 1684
Re: Fender Reverb Values
I would replace the 1meg grid leak on the driver tube with a 1meg pot, creating a send control. Then switch to 2 resistors after you determine the setting that sounds good. Also make sure the 500pf capacitor there is 500pf.
- Sun May 08, 2022 12:44 am
- Forum: Technical Discussion
- Topic: Trying mystery NOS tubes out - no tube tester nearby
- Replies: 11
- Views: 1449
Re: Trying mystery NOS tubes out - no tube tester nearby
That spread of idle results is not large to me. I allow 1 small pop, 1 time.
- Thu Apr 15, 2021 10:43 pm
- Forum: Technical Discussion
- Topic: Deluxe Reverb Buzzing
- Replies: 12
- Views: 1875
Re: Deluxe Reverb Buzzing
Some time after I removed the anti-oscillation caps (aka tone-suckers) from the 6v6 grids of my ’71 DR, a similar issue arose. I changed those grid wires to shielded resolving the issue. You could install the caps as a test. ~1200pf
- Mon May 11, 2020 2:11 am
- Forum: Fender Discussion
- Topic: Question about voltages on Dual Showman
- Replies: 5
- Views: 1053
Re: Question about voltages on Dual Showman
Scheme shows the plug in and switched on. We know it's oscillating so Fender must have shown an average figure for the voltage. Same behavior on my Fender.
- Sun Dec 29, 2019 10:13 pm
- Forum: Fender Discussion
- Topic: 5C2 princeton schematic
- Replies: 1
- Views: 2110
Re: 5C2 princeton schematic
Plugging in 2 instruments provides the ground reference thru each 75k then thru the instruments then to ground. Not normal practice nowadays for sure. You can use a 1 meg. Or 500k for increased peace of mind.
- Sun Dec 29, 2019 9:26 pm
- Forum: Trainwreck Discussion
- Topic: New Express build!!! Some troubleshooting required.
- Replies: 18
- Views: 5632
Re: New Express build!!! Some troubleshooting required.
Sounds like you may have touched both pins 2 & 3 simultaneously. This triggers an arc. I did it once and it blew the heater-to-ground virtual CT resistors. Sounds like your arc self perpetuated via the carbon.
- Mon Nov 11, 2019 2:03 am
- Forum: Technical Discussion
- Topic: Vibro Champ Reverb Amp?
- Replies: 22
- Views: 4547
Re: Vibro Champ Reverb Amp?
Trem before vs after reverb is important and a personal choice. Experimenting with pedals could be fruitful.
- Sun Sep 08, 2019 1:36 am
- Forum: Fender Discussion
- Topic: Jumpering Channels with Blackface Reverb Amp
- Replies: 7
- Views: 3091
Re: Jumpering Channels with Blackface Reverb Amp
Also the Vib channel has the secrete bright cap and the Normal does not.
- Sun Sep 08, 2019 1:23 am
- Forum: Technical Discussion
- Topic: Effect loop level
- Replies: 8
- Views: 2261
Re: Effect loop level
I recently checked my pedals that “should” be used in a loop. My Digiverb doesn’t clip until it sees 3.8Vp-p. Boss DM-3 at 3.6Vp-p. I then recalibrated my “send” which is actually a ‘wet” on mine since it is parallel. With the tube recovery stage, the wet side can now be stronger than the dry side i...
- Fri Jun 07, 2019 1:53 am
- Forum: Trainwreck Discussion
- Topic: FX Loop for Express; Two Rock?
- Replies: 10
- Views: 2849
Re: FX Loop for Express; Two Rock?
I went to assess the pedals’ input capacity and realized I should not assess by feeding them a clipped signal even if clipped only on one half. I injected a sign wave into each pedal directly from my Heathkit generator with a total load on the pedals' outputs of about 500k. Model.................Out...
- Sat Jun 01, 2019 4:05 pm
- Forum: Technical Discussion
- Topic: Series/parallel fx loop: really simple or what?
- Replies: 7
- Views: 691
Re: Series/parallel fx loop: really simple or what?
The way BF/SF reverb works in Fenders can be looked at as a parallel loop. However, they have reduced bass and a transformer in the "loop" path. And the spring tank itself which is the "effect" in the "loop."
- Thu May 23, 2019 3:31 am
- Forum: Trainwreck Discussion
- Topic: FX Loop for Express; Two Rock?
- Replies: 10
- Views: 2849
Re: FX Loop for Express; Two Rock?
All this loop talk got me thinking about mine and how it has been a little too weak in its ver 2 setup. All have been parallel and Ver 1 had a “blend” control going into the PI (with a phase flipping trans on the wet to preserve phase.) Although that allowed for very wet settings I did not want to g...
- Sun Mar 31, 2019 12:48 am
- Forum: Fender Discussion
- Topic: Vibrochamp insanity!
- Replies: 17
- Views: 3082
Re: Vibrochamp insanity!
The later VCs added a cap from the grid to the cathode of the 6v6. I removed mine since it was surely sucking tone. The result was a buzzy oscillation riding most notes. I changed the grid wire to that 6v6 to shielded and the buzz went away. Mine is 1974.
- Wed Dec 26, 2018 3:03 am
- Forum: Trainwreck Discussion
- Topic: Expression trouble, need help
- Replies: 34
- Views: 6327
Re: Expression trouble, need help
Is the chassis paint removed below all the ground-wire connections?
- Sun Dec 23, 2018 3:29 am
- Forum: Fender Discussion
- Topic: Blackface Princeton Reverb clone, el84 reverb driver mod
- Replies: 17
- Views: 2649
Re: Blackface Princeton Reverb clone, el84 reverb driver mod
The 135watt Twin shows 9ma thru the reverb driver on the schematic, doing the math. Same tranny sku as when under lower current from older generations. 12at7 can idle much more current than 12ax7. I also could not find a spec on the max dc current of that tranny when I was looking a few years ago.