tag:blogger.com,1999:blog-3033460626772757790.post1377533720760945249..comments2024-03-25T18:41:36.946+00:00Comments on Paul In The Lab: Brian May Deacy Amplifier Stripboard Veroboard LayoutDrStevensonhttp://www.blogger.com/profile/13901235832359203061noreply@blogger.comBlogger41125tag:blogger.com,1999:blog-3033460626772757790.post-15475292938997679592023-03-05T21:26:40.291+00:002023-03-05T21:26:40.291+00:00Made this twice and I am getting oscillation on bo...Made this twice and I am getting oscillation on both boards. If I pull Q3, it is fine but as soon as I put back Q3 - wild oscillation. Tried loads of germ. transistors but no luck. Anyone have any ideas? CheersIanhttps://www.blogger.com/profile/15254004060035345343noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-85217783160589030582023-02-26T00:19:21.974+00:002023-02-26T00:19:21.974+00:00This comment has been removed by the author.Ianhttps://www.blogger.com/profile/15254004060035345343noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-79194450458050048962021-12-16T06:40:44.821+00:002021-12-16T06:40:44.821+00:00Did you build it?Did you build it?Cristianhttps://www.blogger.com/profile/12636466164695467383noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-83985700731799049312021-11-24T22:25:13.234+00:002021-11-24T22:25:13.234+00:00I did it. And I love it. Thanks for your work Paul...I did it. And I love it. Thanks for your work Paul.Cristianhttps://www.blogger.com/profile/12636466164695467383noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-13441177604482374262020-08-30T21:35:18.719+01:002020-08-30T21:35:18.719+01:00I've built one using your schematics and instr...I've built one using your schematics and instructions. It sounds amazing ! Thanks a lot sachanoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-91963895581875021432020-08-25T11:38:21.941+01:002020-08-25T11:38:21.941+01:00Hello,
I try to make a deacy amp with an old Reali...Hello,<br />I try to make a deacy amp with an old Realistic speaker. But I have some problem vith the transformers. Is it very important to use LT44 and LT700 ? Or, others in and out audio transformers are good enough ? I have some transformers in and out audio from an old Science Fair toys kit...<br />(Sorry for my bad english).<br /><br />EricwEricwhttps://www.blogger.com/profile/01023789085338857499noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-89313966980874933042019-07-22T19:44:06.229+01:002019-07-22T19:44:06.229+01:00The circuit for the original SuperSonic model P.R....The circuit for the original SuperSonic model P.R. 80 shows a simple tone control: https://www.pinterest.com/pin/844776842581864022/visual-search/?x=16&y=16&w=530&h=671 That circuit is quite similar to the one posted here with some minor differences in resistor and capacitor values as well as calling out 7.5V specifically, in a few places. I'm in the middle of building my own Deacy using Paul's circuit, a voltage inverter with a "sag" control, and an attenuator with a 6-way rotary switch using small, precise resistors to reduce the output volume in -3db steps. I will post images and sound clips, when I have finished building it...resansomhttps://www.blogger.com/profile/17341577716154285930noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-77425790365815379642019-06-18T09:56:54.556+01:002019-06-18T09:56:54.556+01:00Hi, Paul, not sure you'll spot this comment as...Hi, Paul, not sure you'll spot this comment as all of this was years ago. I built this a couple of years back and it sounds like it should, kudos to you, my friend. But I was wondering if there is anywhere in the curuit that a passive tone board could be placed?Mark A. L.https://www.blogger.com/profile/11138812132641714382noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-89257605156181617302016-12-08T20:30:29.981+00:002016-12-08T20:30:29.981+00:00Hi there. Can you advise me as to which way the ca...Hi there. Can you advise me as to which way the caps should be facing? I'm new to this and struggling a bit and really don't want to blow anything up. <br /><br />GavAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-27912181713799894352016-09-29T11:10:50.009+01:002016-09-29T11:10:50.009+01:00Hi Paul,
I recently purchased the Xicon transform...Hi Paul,<br /><br />I recently purchased the Xicon transformers, which are a bit beefier than the Eagle trannys but still significantly less power than the 1w in KATs Deacy.<br /><br />Would the same cap and resistor values specified here work with the substituted transformers? Anonymoushttps://www.blogger.com/profile/13983617658976150755noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-10909401004012889432016-09-29T11:07:38.533+01:002016-09-29T11:07:38.533+01:00Hi,
Do you happen to have a .brd file so I could ...Hi,<br /><br />Do you happen to have a .brd file so I could have a PCB fabricated?Anonymoushttps://www.blogger.com/profile/13983617658976150755noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-33425524484910454892016-06-25T03:30:50.729+01:002016-06-25T03:30:50.729+01:00Hey Paul, thanks so much for posting this circuit....Hey Paul, thanks so much for posting this circuit. I just recently built it and it sounds great! One little problem though, as the note decays the distortion fizzles out fairly quickly. Also if I strum the strings lightly no sound gets through at all. Do you have any suggestions for adjustments I could make to mitigate the problem?Mattnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-70686232702291528512016-03-11T10:07:50.130+00:002016-03-11T10:07:50.130+00:00Hello,
What is the gain (Hfe) of each transistor? ...Hello,<br />What is the gain (Hfe) of each transistor? I can not find information about it.<br />ThankBorishttps://www.blogger.com/profile/11979330645070884243noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-48211796561141542702015-02-13T10:49:09.271+00:002015-02-13T10:49:09.271+00:00Hi Paul. I'm finally moving onto my next build...Hi Paul. I'm finally moving onto my next build after building the treble boosters you have on your site (all great) as well as some others, and the Deacy amp is the choice. So I'm now sourcing the components and one modification I would like to make to the Deacy is a DI output. Do you have any suggestions how this could be achieved? Could the schematic be modified to be a Deacy sim in a pedal or as I read earlier, the speaker is a big part of the sound?Nick Jameshttp://www.dirtmonkey.orgnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-65017960204759036982014-06-23T21:33:28.936+01:002014-06-23T21:33:28.936+01:00Can you use a regular 9volt battery? or do you nee...Can you use a regular 9volt battery? or do you need the large pp9 9volt? I am confused with this part, I see that the real Deacy uses a pp9, but I am using your schematic so could you please verify this info for me? And thanks for posting this vero layout, I am now Deacy obsessed!gonzobiafrahttps://www.blogger.com/profile/08776163469268686441noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-9376646633216344762014-05-14T18:27:39.871+01:002014-05-14T18:27:39.871+01:00PCB some pictures for those who wish to print and ...PCB some pictures for those who wish to print and use sensible picture.<br />sorry for my English language.<br />Thank you.<br />http://s27.postimg.org/cjijoua4j/PCB.pngLADPhttps://www.blogger.com/profile/14847492770561026032noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-38549321358595121782013-10-08T06:32:42.087+01:002013-10-08T06:32:42.087+01:00The circuit you used differs in some respects from...The circuit you used differs in some respects from the circuit posted on the Knight Audio site (http://www.deacyamp.com/download/KAT_Projects/KAT%20Deacy-Style%20Amplifier%20Unit%20Project/KAT%20Project%201%20Watt%20Deacy-Style%20Amplifier%20Unit.pdf), though that one doesn't propose to be the true Deacy circuit.<br /><br />Where did you get the circuit you used, and is it closer to the real Deacy circuit (or maybe even THE Deacy circuit)?Mike Brownnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-6847183645937592642013-01-06T20:13:06.148+00:002013-01-06T20:13:06.148+00:00yes yes Paul, it's ok he contacted me !I'l...yes yes Paul, it's ok he contacted me !I'll see it with him directly :). I'll try to see how Eagle looks thank you !Alainhttp://www.brianmay.fr/noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-52611941321375134112013-01-06T19:12:10.323+00:002013-01-06T19:12:10.323+00:00I use EAGLE for PCB design and the schematic layou...<br /><br />I use EAGLE for PCB design and the schematic layouts (when I don't hand draw them)<br />your deacy documentation looks cool, I'm happy that people are building stuff from my site <br />someone called Chris May (^up there)was trying to get in contact with you because he had a little trouble with english. did he get through to you?DrStevensonhttps://www.blogger.com/profile/13901235832359203061noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-41697992639619210302013-01-06T19:01:41.300+00:002013-01-06T19:01:41.300+00:00Hi Paul !
I hope you are fine.
I come back to you ...Hi Paul !<br />I hope you are fine.<br />I come back to you in order to give you news about my Deacy amp .<br />I finished my Original Model !!!<br />You'll have all details and pics here : <br />http://www.brianmay.fr/deacy-amp-la-mise-en-boite/<br />I'm very glad regarding the result , the look and sound !<br /><br />Thanx again for your help.<br />Do you know is a software exists in order to create a PCB from the original schema ?<br />Thank you very much !Alainhttp://www.brianmay.fr/noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-87115759320651839052012-12-06T10:54:06.796+00:002012-12-06T10:54:06.796+00:00bonjour Alain
j'ai fabriqué mon deacy home ma...bonjour Alain<br /><br />j'ai fabriqué mon deacy home made et quand je connecte la pile 9V sur le circuit, mon enceinte bourdonne ( buzz )<br />J'ai vérifier le code couleur des resistances et sens des condensateurs et polarité des 4 transistors et tout est bon.<br />Je compte sur vous pour pouvoir m'aider<br />je passe des journée entière dessus mais je ne trouve pas pourquoi.<br />Au niveau des soudures il n'y a pas de pont<br />encore merci pour votre aideAnonymoushttps://www.blogger.com/profile/14319554379382686730noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-43787875795617272282012-11-28T10:46:22.066+00:002012-11-28T10:46:22.066+00:00ahhh, thank you for the info I'm ready to buil...ahhh, thank you for the info I'm ready to build this one.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-46515765291598078192012-11-06T08:35:19.463+00:002012-11-06T08:35:19.463+00:00yes,the guideline is pretty much the name of the t...yes,the guideline is pretty much the name of the transistor<br />it doesn't need to be matched or anything like that, they just need to be workingDrStevensonhttps://www.blogger.com/profile/13901235832359203061noreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-31316189899526131332012-11-06T03:43:58.656+00:002012-11-06T03:43:58.656+00:00ok, so I can put transistors with random hfe in th...ok, so I can put transistors with random hfe in this circuit an it will works fine? <br />or maybe there is some guideline regarding transistors selection?<br /><br />thx & God bless!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-3033460626772757790.post-43248665719709496982012-11-01T10:53:48.257+00:002012-11-01T10:53:48.257+00:00not at allnot at allDrStevensonhttps://www.blogger.com/profile/13901235832359203061noreply@blogger.com