Hi Franco, It depends on how you want to proceed, IMHO to set the trimmer of the phase inverter, you should have the final outputs perfectly matched in terms of transconductance, and an excellently made output transformer! otherwise the adjustment makes no sense.
many guys here adjust it , by ear!
Search found 395 matches
- Wed May 29, 2024 6:30 am
- Forum: Dumble Discussion
- Topic: The balance trimmer this stranger
- Replies: 8
- Views: 435
- Wed Apr 24, 2024 9:17 am
- Forum: Dumble Discussion
- Topic: Two Rock Classic Reverb Signature Schematic (Current Version)
- Replies: 26
- Views: 2101
Re: Two Rock Classic Reverb Signature Schematic (Current Version)
I think among the first models produced, circa 2009/2010
- Tue Apr 23, 2024 11:16 am
- Forum: Dumble Discussion
- Topic: Two Rock Classic Reverb Signature Schematic (Current Version)
- Replies: 26
- Views: 2101
Re: Two Rock Classic Reverb Signature Schematic (Current Version)
I have the schematic of the signature reverb type 1 and it's a bit different.
- Thu Apr 18, 2024 11:38 am
- Forum: Dumble Discussion
- Topic: Ultraphonix NFB
- Replies: 1
- Views: 488
Ultraphonix NFB
The NFB 4k7/100K net res. what OT tap should it be connected to?
4 Ohm?
S
4 Ohm?
S
- Wed Mar 13, 2024 2:39 pm
- Forum: For Sale/Trade
- Topic: Magnetic Component Output trafo
- Replies: 1
- Views: 151145
- Wed Jan 31, 2024 2:48 pm
- Forum: Dumble Discussion
- Topic: NOS NTE metal film resistors
- Replies: 19
- Views: 26394
Re: NOS NTE metal film resistors
I have already contacted NTE support and they told me that the new productions (item on the right) are the same as those with the blue casing (on the left) but this does not seem to be the case!!
so I buyed MF resistors and received Mox
so I buyed MF resistors and received Mox
- Tue Nov 28, 2023 10:31 am
- Forum: For Sale/Trade
- Topic: Magnetic Component Output trafo
- Replies: 1
- Views: 151145
Magnetic Component Output trafo
A friend of mine sell this transformer :
Magnetic ComponentsClassic Tone : 40-18026
prim. 1750 ohm
sec. 0/4/8/16 ohm
price 250€ (shipping cost out)
I can ship inside European area also.
Shipping cost to calculate
Thanks
Sergio
Magnetic ComponentsClassic Tone : 40-18026
prim. 1750 ohm
sec. 0/4/8/16 ohm
price 250€ (shipping cost out)
I can ship inside European area also.
Shipping cost to calculate
Thanks
Sergio
- Tue Aug 15, 2023 1:16 pm
- Forum: Dumble Discussion
- Topic: Lowering power output
- Replies: 13
- Views: 3299
Re: Lowering power output
power scaler is the best solution! IMHO.
- Thu Jun 29, 2023 1:02 pm
- Forum: Dumble Discussion
- Topic: Adjust BIAS on Dumble amps
- Replies: 12
- Views: 1731
Re: Adjust BIAS on Dumble amps
At mouser you can found vishay resistor 1ohm 1% 3w
- Wed May 10, 2023 7:23 am
- Forum: Dumble Discussion
- Topic: Wiring power transformer
- Replies: 9
- Views: 1579
Re: Wiring power transformer
Correct!, but what do you mean by POWER SWITCH GROUND?
S.
S.
- Thu Apr 27, 2023 8:38 am
- Forum: Dumble Discussion
- Topic: 3rd Gen started
- Replies: 93
- Views: 9798
Re: 3rd Gen started
beautiful build!!, congratulations for all the components used, I assume that you have done a great research. very good!
Sergio
Sergio
- Thu Mar 30, 2023 11:42 am
- Forum: Dumble Discussion
- Topic: UP Bassman Main Board Layout
- Replies: 37
- Views: 4963
Re: UP Bassman Main Board Layout
Nice work, very clean build! congrats
- Tue Mar 28, 2023 8:11 am
- Forum: Fender Discussion
- Topic: fender faceplate searching!
- Replies: 5
- Views: 2836
fender faceplate searching!
Hi, I'm looking for faceplate and rearplate of Fender blackface or silverface era, Bassman or bandmaster.
There is someone who reproduces these plates, or if they can be purchased on some site.
Thanks in advance
Sergio
There is someone who reproduces these plates, or if they can be purchased on some site.
Thanks in advance
Sergio
- Tue Mar 21, 2023 8:58 am
- Forum: Dumble Discussion
- Topic: Transformer problem Dumble 50
- Replies: 38
- Views: 3745
Re: Transformer problem Dumble 50
Bassman PT / OT for a 50w
- Wed Mar 01, 2023 1:05 pm
- Forum: Dumble Discussion
- Topic: New 183 build
- Replies: 363
- Views: 589432
Re: New 183 build
Hi , nice build! congrats!
About the 50/100w switch , work fine?
About the 50/100w switch , work fine?