Search found 535 matches
- Wed May 22, 2024 11:23 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
The added neon Spy lamp with an in series High Value Resistor and Trimmer (in kohm order) will act as a warning 2 x Mosfet VVR w Neon Spy.png Lampada Spia Neon.png if the lamp lights all is fine if the lamp is dark the first mosfet is gone and must be subbed Resistor and Trimmer values must be find ...
- Tue May 21, 2024 7:17 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
Something like the dissipation of the single triode within the same envelope of a dual triode tube
Franco
Franco
- Fri May 17, 2024 8:32 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
Thanks Ten Over & martin manning
Previously I understand exactly this but was not sure you were saying that
With my post of in series mosfet I was trying to say the same thing
Franco
Previously I understand exactly this but was not sure you were saying that
With my post of in series mosfet I was trying to say the same thing
Franco
- Thu May 16, 2024 7:22 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
With the voltage split equally between two MOSFET's in series, the voltages on the X-axis will be one-half and the power at each step will be one-half. The power will still peak at the mid-point, but it will be half the single MOSFET power. English isn't my language, please can you explain this thi...
- Thu May 16, 2024 9:01 am
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
They had said it was actually easier for them closer to full voltage as well as the more extreme bottom 1/3 voltage setting. Can someone verify or explain this? As far as I can know the mosfet are used in this application as Linear redoucers (something like a rheostat) I can agree that if you reduc...
- Tue May 14, 2024 7:13 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
One other way, less simple but I think working, will be to build a pair of complete VVR and to connect it in seires then adjust the first pot as the first VVR lower the voltage by 1/2 of what you require and the second one to reduce the remaining excess of voltage this way you are sure the power dis...
- Mon May 13, 2024 6:50 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
Unfortunately no till the second one don't blast
Franco
Franco
- Mon May 13, 2024 5:36 pm
- Forum: Technical Discussion
- Topic: Two 20 watt amps in one chassis - layout/grounding
- Replies: 17
- Views: 882
Re: Two 20 watt amps in one chassis - layout/grounding
It is some time I'm working to a stereo amp based on a pair of VOX AC4 circuits (two different versions of the VOX AC4) in the same cabinet as to try to prevent ground problems I tried to read here and there and to collect a bit of documentation I ended with the intention to incorporate on each amp ...
- Mon May 13, 2024 5:15 pm
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1528
Re: Can I Parallel 2 Mosfets in VVR?
Just for knowledge At the begin I didn't understand well why you want to use a pair of Mosfet in parallel for VVR for the same reason .... I can't imagine a tube amp needing parallel MOSFETs for VVR. however reading your post I remembered a circuit a friend sent to me some years ago Double Mosfet VV...
- Sat Apr 20, 2024 7:11 pm
- Forum: Dumble Discussion
- Topic: Looking for HRM Schematic of the attached Layout
- Replies: 0
- Views: 924
Looking for HRM Schematic of the attached Layout
Does someone has the schematic corresponding to this HRM Layout ?
Thanks
Franco
Thanks
Franco
- Sun Jan 14, 2024 5:51 pm
- Forum: Technical Discussion
- Topic: Schematic for oddball Sano amp
- Replies: 15
- Views: 3475
Re: Schematic for oddball Sano amp
Thanks again Steve
Franco
Franco
- Sat Jan 13, 2024 11:55 am
- Forum: Technical Discussion
- Topic: Schematic for oddball Sano amp
- Replies: 15
- Views: 3475
Re: Schematic for oddball Sano amp
.... The schematic is not imho showing the jfet correctly .... I agree with you, the simbol that was used is the simbol of an SCR Diode As I'm not confident with Jfet and other Solid State components, if someone can put on the actual schematic where are placed the Source - Drain - Gate connections ...
- Thu Jan 11, 2024 2:04 am
- Forum: Technical Discussion
- Topic: Schematic for oddball Sano amp
- Replies: 15
- Views: 3475
Re: Schematic for oddball Sano amp
p.s.:I aplogize, when I posted I linked a wrong version of the file, now it is correct
- Wed Oct 25, 2023 7:15 am
- Forum: Technical Discussion
- Topic: How to Determine if a Tube is Microphonic?
- Replies: 9
- Views: 4542
Re: How to Determine if a Tube is Microphonic?
Ciao GAStan
May be you are interested on this
Franco
May be you are interested on this
Franco
- Tue Oct 24, 2023 3:53 am
- Forum: Technical Discussion
- Topic: Visio stencil/shapes library
- Replies: 11
- Views: 17967
Re: Visio stencil/shapes library
I decided to revise my 2W and 3W (Metal Film) Power Resistor Stencil using bot Color Bands and Numeric Values on each resistor
If you are interested here attached you can find the .vss Stencil file
Franco
If you are interested here attached you can find the .vss Stencil file
Franco