Search found 528 matches
- Mon May 13, 2024 5:36 pm
- Forum: Technical Discussion
- Topic: Two 20 watt amps in one chassis - layout/grounding
- Replies: 17
- Views: 429
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: 15
- Views: 297
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: 285
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: 3246
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: 3246
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: 3246
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: 4348
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: 16681
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
- Fri Jun 02, 2023 9:38 pm
- Forum: Technical Discussion
- Topic: Switchable Output Transformer?
- Replies: 3
- Views: 309
Re: Switchable Output Transformer?
To give a look to your old TU
Franco
Franco
- Sat May 20, 2023 12:59 am
- Forum: Technical Discussion
- Topic: what transformers (made in Italy)?
- Replies: 3
- Views: 448
Re: what transformers (made in Italy)?
I just verified with some friends, they know Piemme Elektra and are very satisfied also for this brand
Franco
Franco
- Fri May 19, 2023 10:25 pm
- Forum: Technical Discussion
- Topic: what transformers (made in Italy)?
- Replies: 3
- Views: 448
Re: what transformers (made in Italy)?
I haven't direct experience with InMadOut but I've read lot of times good feedbak about those transformers
Franco
Franco
- Mon Apr 03, 2023 6:48 am
- Forum: Technical Discussion
- Topic: Dumble Preamp (for SE amp)
- Replies: 22
- Views: 1836
Re: Dumble Preamp (for SE amp)
There Is no problem
K
K
- Sun Apr 02, 2023 7:51 pm
- Forum: Technical Discussion
- Topic: Dumble Preamp (for SE amp)
- Replies: 22
- Views: 1836
Re: Dumble Preamp (for SE amp)
.... I think a traditional fixed resistor. Why switched? I mean that the pots on the schematic, that are swapped using a switch, are acting, one at a time, as grid leak resistor ... You mentioned 6Av6 before power tube. Is there a reason for choosing this over a 12AX7 or AT7 or AY7. I told 6AV6 bec...
- Sat Apr 01, 2023 10:17 pm
- Forum: Technical Discussion
- Topic: Dumble Preamp (for SE amp)
- Replies: 22
- Views: 1836
Re: Dumble Preamp (for SE amp)
Switched pots used as grid leak resistor ?
Franco
Franco
- Sat Apr 01, 2023 4:18 pm
- Forum: Technical Discussion
- Topic: Dumble Preamp (for SE amp)
- Replies: 22
- Views: 1836
Re: Dumble Preamp (for SE amp)
I'm quikly reading that thread and I've find something that is not favourable to me https://ampgarage.com/forum/viewtopic.php?p=120509#p120509 That preamp has not enough swing for a tube as 5881 and so I think the same for the GU50 or 1625 tubes EL84 is in the order of 11.3mA/V, 1625 is around 6mA/V...