No way Jose, that any type of AI wouldn't implode, trying to summarize what we are doing here for 20-ish years
And, that's good - even if any sort of human related progress isn't possible without continual and steady work, it's certainly not possible without some leap of faith moments, in many cases not at all justified in technical context
that sole fact is, for me, hard to believe that any type of AI will ever understand
And, that's good - even if any sort of human related progress isn't possible without continual and steady work, it's certainly not possible without some leap of faith moments, in many cases not at all justified in technical context
that sole fact is, for me, hard to believe that any type of AI will ever understand
So I happened to get a hold of some 2SJ201/SK1530 mosfets. I was wondering if the F5m is pretty much the intended stripped down version of the F5 that would bode well with these mosfets. From what I can gather with a quick search, these mosfets respond well to low source resistance.
https://www.diyaudio.com/community/...our-toshiba-2sj201-sk1530.313569/#post5215161
https://www.diyaudio.com/community/...our-toshiba-2sj201-sk1530.313569/#post5215161
I received my 2 F5m kits including the power boards! I'll be ordering transformers/PSUs soon. Any suggestions on brands for various types of good quality wiring I should stock up on? What gauges should I have, and should I use stranded or solid core wire? I know sometimes the holes on the PCBs are a bit too small if the wrong gauge/type of wire is used.
I ordered these long time is this good to use dor the power supply?
https://www.mouser.ph/ProductDetail/871-B57237S0509M000
https://www.mouser.ph/ProductDetail/871-B57237S0509M000
robonDNA,
16 AWG should be good enough - please find comments made by 6L6:
https://www.diyaudio.com/community/threads/f5m-kit.408290/page-22#post-7616668
16 AWG should be good enough - please find comments made by 6L6:
https://www.diyaudio.com/community/threads/f5m-kit.408290/page-22#post-7616668
There is no formal F5m build guide (yet).
Everything you need should be in the article and/or in this thread. If you run into any issues, helpful folks will chime in.
That's not a broken link... it's a page (as it says) that you found that is not intended to be viewed directly. Click the link / button at the bottom to go to the main store page.
Everything you need should be in the article and/or in this thread. If you run into any issues, helpful folks will chime in.
That's not a broken link... it's a page (as it says) that you found that is not intended to be viewed directly. Click the link / button at the bottom to go to the main store page.
I believe I read earlier that the F6 build guide can be used instead? Is it available as a pdf download?
https://www.diyaudio.com/community/threads/f6-illustrated-build-guide.277850/
https://www.diyaudio.com/community/threads/f6-illustrated-build-guide.277850/
No
You can create a .pdf yourself from the web page, if that's your thing.
Nelson Pass mentions a build guide, and I am basing my inquiry on this info. I purchased the kit assuming the guide was ready, but I can work without one.. Also, I do appreciate this thread quite a bit, but at the same time I notice many of the posts are not related to building the f5m kit. It's difficult to decipher a build guide from these posts. I did suggest we use AI to summarize posts/comments into something more digestible but was asked to remove it due to being too much off-topic. Although I do agree my post was a bit off topic ( I started the post stating so ), the thread seems to have been 'polluted' with side-info. Perhaps there could be a new 'F5m Build Guide' thread and we can start it there? ( specially seeing it is not out yet... )
Also, the build guide could be very simple. Just some simple steps on where to start. Over time, we can add more detail to each step. Step 1 could be ordering tools and wire. ( recommended tools and wire type, ie 16AWG silicone tinned stranded ) . Step 2 could be build the case, leaving screws loose until fitting all parts. I would now be on step 3. Ordering the transformer with some recommendations. I guess step 4 is building the power boards, step 5 amp boards, with special care to line up mosfets to heatsinks before soldering? Maybe having a link to another guide to start would help too.
https://www.diyaudio.com/community/threads/aleph-jzm-kit-build-support.412501/
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@roboDNA, I'll buy the F5m kit from you in whatever condition it currently exists: built, half-built, or not-built. I'll pay whatever you paid, plus extra for shipping from Canada to San Francisco. This will let allow you to break even with zero financial loss, and I'll get an F5m kit to play with. Your pocketbook is made whole, and I receive a project to work on.
Of course, at some unknown time in the future, you might possibly decide to purchase a second F5m kit. That is, if a Build Guide is ever written. And furthermore if you review the Build Guide thoroughly & find it satisfactory in every respect. Before then, you have no fiscal commitment and no dismay.
Who knows, you may even offer to buy back my fully built, carefully tested, and thoroughly burned-in F5m. Your decision of course.
Send price and PayPal userID in Private Message "Conversation" please.
-- Mark Johnson
Of course, at some unknown time in the future, you might possibly decide to purchase a second F5m kit. That is, if a Build Guide is ever written. And furthermore if you review the Build Guide thoroughly & find it satisfactory in every respect. Before then, you have no fiscal commitment and no dismay.
Who knows, you may even offer to buy back my fully built, carefully tested, and thoroughly burned-in F5m. Your decision of course.
Send price and PayPal userID in Private Message "Conversation" please.
-- Mark Johnson
You can still purchase them. You must have misunderstood my inquiry about the guide... I'm looking to build my 2 kits and not sell them sorry. ( why would you not purchase them from the diyAudio store? )
uh.. looking at your post again, I'm seeing sarcasm... I guess I don't get it. I did mention I am very happy with everything I have including this thread so no worries. There is no guide, can we move forward and start one? I'm willing to do a guide but need some guidance on where to start and also why I joined this awesome group of folks who have the best design/build ideas. I've actually made some very good headway with this group so far.
uh.. looking at your post again, I'm seeing sarcasm... I guess I don't get it. I did mention I am very happy with everything I have including this thread so no worries. There is no guide, can we move forward and start one? I'm willing to do a guide but need some guidance on where to start and also why I joined this awesome group of folks who have the best design/build ideas. I've actually made some very good headway with this group so far.
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^ @roboDNA - There definitely will be a formal build guide. Agreed, many threads veer off-topic. Nature of the beast I suppose.
What you could do (and many might appreciate it) is to start a thread specifically for your build and document it along the way. That's what Jim (6L6) did for a number of projects and started the wonderful build guide trend. If folks veer too far off topic, you can report the posts (per forum rules) and have them removed / moved if you like.
In the interim (knowing that it's tough to gauge just exactly how much guidance you may need) or how many similar projects you've built in the past ... As it notes, this project is intended for "Intermediate" builders, but IMO, if you're careful and ask questions along the way when you run into any obstacles... it shouldn't give anyone issues.
A basic build sequence may be:
Build and test your PSU. Validate that you have roughly +- 24VDC (it will likely be a little higher with no load). A dim bulb tester and/or Variable transformer are wonderful to have. I didn't build the exact PSU included with the kit, so any pics I'd show may add to confusion vs. help.
Stuff the amp PCBs minus the output MOSFETs. Some folks also like to connect / solder their DC supply wiring and I/O wiring to the amp boards before they're mounted to the heatsinks. My advice is to leave the wiring bit long if you do. There are a number of completed board pics in the thread to show some examples.
Mount the amp PCBs / solder the output MOSFETs.
Connect and test one amp channel at a time. Rough in the bias and offset. A number of people have mentioned various ways they prefer to set the bias and offset. Again, a variable transformer and/or dim bulb tester may be nice to have. Make sure to watch the bias closely at first power up and ensure you don't have it cranked all they way to the "max". As many have noted, the single-turn pots make dialing it in a little "sensitive". Go easy. Nelson's article does a really nice job, IMO.
Button it up in the chassis. Set final bias and offset at temp equilibrium.
Ask as needed for any clarification. Not sure how much detail is needed.
Jim also posted some really nice shots of a completed amp, and I likely have photos showing most things if needed.
Go slow... have fun.
What you could do (and many might appreciate it) is to start a thread specifically for your build and document it along the way. That's what Jim (6L6) did for a number of projects and started the wonderful build guide trend. If folks veer too far off topic, you can report the posts (per forum rules) and have them removed / moved if you like.
In the interim (knowing that it's tough to gauge just exactly how much guidance you may need) or how many similar projects you've built in the past ... As it notes, this project is intended for "Intermediate" builders, but IMO, if you're careful and ask questions along the way when you run into any obstacles... it shouldn't give anyone issues.
A basic build sequence may be:
Build and test your PSU. Validate that you have roughly +- 24VDC (it will likely be a little higher with no load). A dim bulb tester and/or Variable transformer are wonderful to have. I didn't build the exact PSU included with the kit, so any pics I'd show may add to confusion vs. help.
Stuff the amp PCBs minus the output MOSFETs. Some folks also like to connect / solder their DC supply wiring and I/O wiring to the amp boards before they're mounted to the heatsinks. My advice is to leave the wiring bit long if you do. There are a number of completed board pics in the thread to show some examples.
Mount the amp PCBs / solder the output MOSFETs.
Connect and test one amp channel at a time. Rough in the bias and offset. A number of people have mentioned various ways they prefer to set the bias and offset. Again, a variable transformer and/or dim bulb tester may be nice to have. Make sure to watch the bias closely at first power up and ensure you don't have it cranked all they way to the "max". As many have noted, the single-turn pots make dialing it in a little "sensitive". Go easy. Nelson's article does a really nice job, IMO.
Button it up in the chassis. Set final bias and offset at temp equilibrium.
Ask as needed for any clarification. Not sure how much detail is needed.
Jim also posted some really nice shots of a completed amp, and I likely have photos showing most things if needed.
Go slow... have fun.
@ItsAllInMyHead thanks for the info. I started a new thread and will try to document my build so it can be used as another guide. If you don't mind, I'll start with your suggested first steps to get the ball rolling.
@robo
Any time.
That's awesome. I think guides written from the perspective of someone that "needs a guide" are incredibly useful. You'll likely focus on things that may otherwise be overlooked. I think it will be fantastic. The folks that did This Aleph J Build Guide started off in a relatively similar place to you it seems, and theirs is incredible, IMO.
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