Amp Internals 2 |
Post Reply | Page <1 158159160161162 260> |
Author | |
michel29
Registered User Joined: 04 November 2014 Location: france brittany Status: Offline Points: 55 |
Post Options
Thanks(0)
|
Oh
it's Melodium tranformers on his back ? used as " microphone transformers" ? i've find similar transformers with an old PA 100V amplifier a Bouyer ST30 i've recycled the tranformers in "direct-input boxes" there transformers souds great http://www.hostingpics.net - http://www.hostingpics.net - http://www.hostingpics.net - http://www.hostingpics.net - Edited by michel29 - 08 December 2014 at 11:23pm |
|
michel29
Registered User Joined: 04 November 2014 Location: france brittany Status: Offline Points: 55 |
Post Options
Thanks(0)
|
for the PHD PD3600
i use it vith the 11 program , dsp bypassed not really the amplifier introduce 1,5 mS delay into the signal and cut about at 20 Khz presets 1, 2 and 3 was programmed no programs at other presets a clone of DAP ? dap software compatible ? edit: i'm viewed DAP xtreme700 users manual dsp seems identically in "offline" mode no briged operation for PHD Edited by michel29 - 08 December 2014 at 11:44pm |
|
Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
Post Options
Thanks(0)
|
"Oh
it's Melodium tranformers on his back ? used as " microphone transformers" ?" Yes, those are the ones. There there to match low impedence mics to high impedence input of the valves - similar to a DI, just the other way around. |
|
Earplugs Are For Wimps!
|
|
burningbush
Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897 |
Post Options
Thanks(0)
|
Love the wooden housing, one piece tub with lid. Get some oil on it.
|
|
music is the message
|
|
michel29
Registered User Joined: 04 November 2014 Location: france brittany Status: Offline Points: 55 |
Post Options
Thanks(0)
|
wooden Di ?
a pratical choise machined holes in wooden with a router to make cases machined lit also with router asembled XLR ant jack sockets on lit soldered transformers wire on sockets gluted lit on cases machined sides with joiner and separated the Di boxes i've used 2 types of Melodium transformers fisrt , 1:20 , ideal for a Di box second 1:2 i use it for machines with low output level |
|
Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
Post Options
Thanks(0)
|
BTW, how many cables do your transformers actually have? It´s a bit difficult to tell from the photos. The ones I have on the amp only use 4, ie balanced side is floating and so has to be tied to earth to work properly. That would make them difficult to use for (fully flexible) DI as you can´t lift the earth. Have you had any problem with that?
|
|
Earplugs Are For Wimps!
|
|
michel29
Registered User Joined: 04 November 2014 Location: france brittany Status: Offline Points: 55 |
Post Options
Thanks(0)
|
ground lift ?
it's lifted only one problem vith a keybord fited vith SMPS power adapter , no ground on this SMPS : small hum the 20:1 have 4 wires pimary , secondary , sield is connected to can high impedance winding measured about at 3500 ohm with a mulitmeter 2:1 is a 1:1:1 with 2 windings serial coupled 6 wires 3 wires for primary ( 1:1 ) 2 wires > seconary and shield on the valve amplifier , hum with a balanced microphone ? Edited by michel29 - 10 December 2014 at 7:07pm |
|
Parkend10
Registered User Joined: 04 January 2009 Location: Aberdeen, UK Status: Offline Points: 69 |
Post Options
Thanks(0)
|
Anybody here seen inside one of the new HH Scalar amps yet? There's a more than passing resemblance to the 500D externally. Be interested to know if there's any heritage architecture remaining internally.
|
|
Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7199 |
Post Options
Thanks(0)
|
"the 20:1 have 4 wires
pimary , secondary , sield is connected to can high impedance winding measured about at 3500 ohm with a mulitmeter" Yes, that sounds like the one on the amp. Balanced mic properly connected doesn´t hum, no. And what I meant is that you can´t isolate the low-impedence/balanced side earth as it has to be connected to the common earth point, otherwise it will hum. I´ve built plenty of DI´s and always used transformers with a centre tap for the extra flexibility. Eg: http://www.thomann.de/es/neutrik_nte_103_audio_uebertrager.htm |
|
Earplugs Are For Wimps!
|
|
burningbush
Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897 |
Post Options
Thanks(0)
|
"Class 2H circuit with switch-mode power supply" - so probably just a passing resemblance. |
|
music is the message
|
|
burningbush
Old Croc Joined: 25 May 2009 Location: Pictland Status: Offline Points: 5897 |
Post Options
Thanks(0)
|
Found this????
|
|
music is the message
|
|
jbl_man
Moderator Group Joined: 12 January 2005 Location: London. Status: Offline Points: 11154 |
Post Options
Thanks(0)
|
Bigger one. HH scalar SR2000
|
|
Be seeing you.
|
|
Post Reply | Page <1 158159160161162 260> |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |