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Post by wlinart on Aug 9, 2018 14:39:31 GMT -6
Great, indeed. May i ask if edcor came back at you with a price qoute? Because shipping the transformers and pcb's together would be easier/cheaper. But of course i would also understand if you would just sell the pcb's.
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Post by svart on Aug 10, 2018 6:52:38 GMT -6
Great, indeed. May i ask if edcor came back at you with a price qoute? Because shipping the transformers and pcb's together would be easier/cheaper. But of course i would also understand if you would just sell the pcb's. I haven't received anything from them. I used their "contact us" link since it was one of their days off. I'll try again using their support ticket option. I also don't see a direct choice for the output transformer from edcor. I do see a PCB mounted transformer that might work if wired backwards. I'll ask about that too. |
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Post by wlinart on Aug 10, 2018 8:20:01 GMT -6
Great, indeed. May i ask if edcor came back at you with a price qoute? Because shipping the transformers and pcb's together would be easier/cheaper. But of course i would also understand if you would just sell the pcb's. I haven't received anything from them. I used their "contact us" link since it was one of their days off. I'll try again using their support ticket option. I also don't see a direct choice for the output transformer from edcor. I do see a PCB mounted transformer that might work if wired backwards. I'll ask about that too. Thank you! |
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Post by svart on Aug 12, 2018 9:50:20 GMT -6
I haven't received anything from them. I used their "contact us" link since it was one of their days off. I'll try again using their support ticket option. I also don't see a direct choice for the output transformer from edcor. I do see a PCB mounted transformer that might work if wired backwards. I'll ask about that too. Thank you! So edcor will not make the transformers they said. Hairball still has the set for the sa3a, which will work just fine here, except my boards have to provision for PCB mounted transformers. |
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Post by wlinart on Aug 12, 2018 11:24:53 GMT -6
So edcor will not make the transformers they said. Hairball still has the set for the sa3a, which will work just fine here, except my boards have to provision for PCB mounted transformers. Too bad. Strange that they made it before, but don't offer it anymore. Hairball it is then.
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Post by Blackdawg on Aug 13, 2018 14:29:56 GMT -6
Subbed.
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Post by kevinnyc on Aug 16, 2018 7:37:39 GMT -6
I’d like to get in on this as well if there’s a PCB or two that could make it my way...
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Post by svart on Aug 16, 2018 8:25:56 GMT -6
I’d like to get in on this as well if there’s a PCB or two that could make it my way... There's a few left. I've been stupid busy, so I'm behind on the documents. If anyone wants to go ahead and get boards now though, I can start shipping them. |
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Post by amaziad on Aug 17, 2018 7:57:28 GMT -6
I’d be interested in a pair of boards if they’re available. Thanks!
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Post by svart on Aug 17, 2018 9:04:31 GMT -6
So right now I have these members and quantities from this thread and PM's:
winetree x2
jeromemason x1
dogears x2
johneppstein x2
bram x2
wlinart x2
KevinnyC x2
Amaziad x2
avgatzeblouz x2
That's 17 boards!
All gone!
I'll start hitting you guys up for payment monday.
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Post by svart on Aug 23, 2018 8:56:38 GMT -6
The working BOM and preliminary build/info document are attached below! Those who are on the list, please read through these and please ask any questions. I'll start PM'ing you for payment and shipping info next monday (Aug 27). LA3A.xlsx (16.28 KB) Care and feeding of your LA3A PCB.docx (1.1 MB) It also looks like if you do the bare minimum build, you can do this around 275$ with a VU meter and doing your own front panel (stickers, waterslide, etc). VU is not included in the BOM since new ones are expensive, and I suggest folks try used ones to keep costs down. |
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Post by wlinart on Aug 25, 2018 1:31:18 GMT -6
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Post by svart on Aug 31, 2018 7:55:13 GMT -6
Sorry folks, this week has been a real drag with work and I'm running behind on everything. I should be caught up over the long weekend though.
Thanks for the patience!
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Post by svart on Sept 12, 2018 6:49:34 GMT -6
I haven't heard from anyone about the BOM or project in general. Does this mean everyone is OK with it as is?
I can start invoicing folks right away, but I kinda wanted feedback to see if there were any questions or anything first. I don't want to stick anyone with a project they aren't ready for.
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Post by wlinart on Sept 12, 2018 10:01:40 GMT -6
Didn't realise you were waiting for feedback, sorry. For me personally it's all very clear (right now, wait till i start building it  ). The only thing which isn't 100% clear to me in the info document, is the transformer wiring. But that will probably clear up once i got a closer look at the pcb and the transformers, which is also why i haven't asked anything about it yet. It looks like a great project, not too many components. Everything which could make it difficult (like calibration and metering and things) is very clearly explained. |
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Post by svart on Sept 12, 2018 13:27:16 GMT -6
Didn't realise you were waiting for feedback, sorry. For me personally it's all very clear (right now, wait till i start building it ). The only thing which isn't 100% clear to me in the info document, is the transformer wiring. But that will probably clear up once i got a closer look at the pcb and the transformers, which is also why i haven't asked anything about it yet. It looks like a great project, not too many components. Everything which could make it difficult (like calibration and metering and things) is very clearly explained. The wiring is color coded based on the original transformer wire colors. The Hairball transformer uses the same color code, so it shouldn't be difficult! if you plan on using a different transformer, I can try to help, but it should be easy. |
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Post by bram on Sept 12, 2018 22:41:26 GMT -6
Svart, the directions and BOM you provided look clear to me so far - no feedback to offer at this point. Happy to move forward with payment when you're ready.
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Post by wlinart on Sept 13, 2018 5:36:56 GMT -6
Didn't realise you were waiting for feedback, sorry. For me personally it's all very clear (right now, wait till i start building it ). The only thing which isn't 100% clear to me in the info document, is the transformer wiring. But that will probably clear up once i got a closer look at the pcb and the transformers, which is also why i haven't asked anything about it yet. It looks like a great project, not too many components. Everything which could make it difficult (like calibration and metering and things) is very clearly explained. The wiring is color coded based on the original transformer wire colors. The Hairball transformer uses the same color code, so it shouldn't be difficult! if you plan on using a different transformer, I can try to help, but it should be easy. I thought so, which is why it probably will become clear once i have the transformers at hand |
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Post by jeromemason on Sept 18, 2018 23:07:11 GMT -6
Just let me know Chris when you're ready to ship these out. I hadn't been following the thread and haven't heard from you threatening to break my legs so I figured you were not ready to ship them out yet, but, I really want mine I've been itching to run my electrics through LA3A's for a long time now. Also, and it's probably been mentioned, but will you either give a schematic or info on the transformers setup? I'm going to go with Carnhill's, maybe even Sowters. |
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Post by svart on Sept 19, 2018 8:24:58 GMT -6
Just let me know Chris when you're ready to ship these out. I hadn't been following the thread and haven't heard from you threatening to break my legs so I figured you were not ready to ship them out yet, but, I really want mine I've been itching to run my electrics through LA3A's for a long time now. Also, and it's probably been mentioned, but will you either give a schematic or info on the transformers setup? I'm going to go with Carnhill's, maybe even Sowters. Well OK! I've been slacking on this, but I should just go ahead and start sending messages to folks about these. I've been using my dual LA3A for a couple weeks now and it seems to work exactly as it should. If you know which carnhills or sowters, I can tell you which leads go where. I do know that the hairball output transformers were faithfully recreated from the originals, so if you want it to sound like an LA3A and also save a few dollars, I'd highly suggest using those. I don't think the input transformer matters much in this design since it's line level fed, but the output transformer will matter more since it has a second primary winding carrying DC. As you know, transformers react differently with the inclusion of DC, so I can't say how sowter and carnhill will react, or if it will null out any advantages to using them. I'll update the build document in a few minutes with some more info on transformer wiring, etc. |
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Post by jeromemason on Sept 19, 2018 11:31:55 GMT -6
Well, Carnhill is supposed to be winding bobbins to be exactly like Neve, and that's what makes Neve so special is DC flowing and gapping of the core. One cool thing I might do and probably will do is get the Hairball transformers and also get a pair of Carnhills that are contrast of the Hairballs and put them on a switch..... Just being able to get a different flavor if I want it.
I was looking at most La3a schematics and the input transformers are just there to keep the impedance in check and to mate the comp with whatever you throw at it. I know that Lundahl makes a 1:4 line level tranny, I bet it would give the comp a little more definition..... This intrigues me because I'd never thought about messing with this when you first mentioned these, I just know I loved how La3a's sound on electric and acoustic guitars..... But, it'd be cool to build a little circuit off to the side that takes the wet comp before the output trannies, runs that through the Sowters (to me Sowters make anything sound BIG) with some level, saturating the hell out of them, maybe build in an air component on that side board as well and finally just take all that and put it on a mix knob to lay over the original La3a sound.
Maybe not air, but having a sub circuit that treats guitars well, maybe helps to smooth them out and boost's the freq's associated generally with where guitars are happy to mix in over the pre tranny output..... I know when I'm mixing the one thing I'm always having to do, and it's on every single mix I get, is I have to put JST's Clip on the electrics. I hate using EQ and would rather just use filters, so I use Clip to give me that power and saturating top end to help my electrics cut and sit without having to crank eq knobs. So I think what I'll do is build myself a little sub circuit on this that does all that for me and I can mix it over the La3a's pre tranny output. Should be fun!
And sorry if that post sounds like I'm rambling because I'm in a hurry and I'm just typing what's coming out of my head. Let me know where to send the money and thanks again!
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Post by svart on Sept 19, 2018 11:52:52 GMT -6
Ok, document updated.
I'll start sending people messages now.
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Post by svart on Sept 19, 2018 12:15:27 GMT -6
All PM's sent to those who expressed interest in the PCBs in this thread and through PM's. So far 17 boards are spoken for, which leaves a single board left, which I think I'll save as a spare just in case something happens and someone needs one.
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Post by svart on Sept 21, 2018 14:06:15 GMT -6
OK! Just about everyone has paid, and I've been making labels and such. I was hoping to get everyone paid so I can get to the post office and do one big transaction since the post offices around here are just terrible with long lines, etc..
Anyway, I'll finish getting everything packaged up and send it all on monday!
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Post by svart on Sept 24, 2018 19:04:10 GMT -6
All folks in the USA who've paid, your orders shipped today.
Waiting for an address for one more person in the USA.
International folks, I'll ship your orders tomorrow. I didn't have the right customs form, so I had to pick some up from the post office today when I shipped the other packages.
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).
