Search found 395 matches

by sergio
Wed May 29, 2024 6:30 am
Forum: Dumble Discussion
Topic: The balance trimmer this stranger
Replies: 8
Views: 429

Re: The balance trimmer this stranger

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!
by sergio
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
by sergio
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.
by sergio
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
by sergio
Wed Mar 13, 2024 2:39 pm
Forum: For Sale/Trade
Topic: Magnetic Component Output trafo
Replies: 1
Views: 151141

Re: Magnetic Component Output trafo

up
by sergio
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
by sergio
Tue Nov 28, 2023 10:31 am
Forum: For Sale/Trade
Topic: Magnetic Component Output trafo
Replies: 1
Views: 151141

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
by 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.
by sergio
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
by sergio
Wed May 10, 2023 7:23 am
Forum: Dumble Discussion
Topic: Wiring power transformer
Replies: 9
Views: 1577

Re: Wiring power transformer

Correct!, but what do you mean by POWER SWITCH GROUND?

S.
by sergio
Thu Apr 27, 2023 8:38 am
Forum: Dumble Discussion
Topic: 3rd Gen started
Replies: 93
Views: 9796

Re: 3rd Gen started

beautiful build!!, congratulations for all the components used, I assume that you have done a great research. very good!
Sergio
by sergio
Thu Mar 30, 2023 11:42 am
Forum: Dumble Discussion
Topic: UP Bassman Main Board Layout
Replies: 37
Views: 4962

Re: UP Bassman Main Board Layout

Nice work, very clean build! congrats :wink:
by sergio
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
by sergio
Tue Mar 21, 2023 8:58 am
Forum: Dumble Discussion
Topic: Transformer problem Dumble 50
Replies: 38
Views: 3744

Re: Transformer problem Dumble 50

Bassman PT / OT for a 50w :wink:
by sergio
Wed Mar 01, 2023 1:05 pm
Forum: Dumble Discussion
Topic: New 183 build
Replies: 363
Views: 589429

Re: New 183 build

Hi , nice build! congrats!

About the 50/100w switch , work fine?