| MikeW |
| It was going to be an Aleph 3, but it ended up with 17.5 volt rails. |
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| MikeW |
| Thanks to Nelson, Jam and George for the extra parts. |
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| MikeW |
| Fairchild output devices, 350VA victoria magnetics 15-0-15 , 36000 uf. , .2ohm, 36000 uf. per rail. It sounds very nice. Bias 1 amp per output. |
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| Netlist |
Nice job Mike,
What speakers are they driving?
You should try to make some slightly better pictures and send them over to PassDiy.
/Hugo :) |
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| Blues |
| Very nice! I like your wood front panel...warm, reddish tone. Warms up the usually cold-looking (but warm to the touch) metal chassis:) |
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| Stabist |
Nice Aleph Mike!
Is it made on MiniA boards or ?? |
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| Zapped |
| Looks like the heatsinks are taken from the old Heathkit amp that dates from the 70's; same ones I used on my Zen4. Mine work great on the Zen; how do they do on your Aleph ?:smash: |
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| MikeW |
I gave away all my mini boards. If eveyone I sent them to builds an amp you should see quite a few. Someone was nice enough to send me a set of Brian GT boards.
I am driving some little Cambridge soundworks speakers along with mini-pipe-o.
The heatsinks are only 40 deg. This amp will see more work before I am finished with it.:smash:
I built five Mini-A's and kept the one I liked the best. Some Aleph P's next and maybe a PLH after that. |
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| eLarson |
| What type of wood/finish did you use? |
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| Panelhead |
| quote: | Originally posted by MikeW
I gave away all my mini boards. If eveyone I sent them to builds an amp you should see quite a few. Someone was nice enough to send me a set of Brian GT boards.
I am driving some little Cambridge soundworks speakers along with mini-pipe-o.
The heatsinks are only 40 deg. This amp will see more work before I am finished with it.:smash:
I built five Mini-A's and kept the one I liked the best. Some Aleph P's next and maybe a PLH after that. |
Mike,
Looks great! Interested in hearing how it sounds. BTW, what is a PLH? Is it a crossover?
George - Freezing in Houston |
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| steenoe |
That is a beatiful piece of wood, you used for the front plate.| quote: | | Fairchild output devices |
What Fairchild-part did you use for the output?
Steen. |
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| MikeW |
The front is Cocobola with teak oil. The outputs are FQA19n20. I had a bunch left over from another project.
The PLH is another amp. It is a variation on the JLH. The guy that is working on it is very busy so it could be a while before it gets done.
George, thanks for the parts. How is the Green Monster working?
:D |
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| chris ma |
May be that is the one and only LH enhanced version?:cool:
The Butcher:D |
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| MikeW |
| Nice to see you are out of Texas.:clown: |
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| jam |
Mike,
Anyone that uses Cocobola for a for a front panel needs to be sent to Texas.........:D :D :D |
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| jacco vermeulen |
| What about people who are unable to pronounce Cocobola ? |
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| MikeW |
Jam, how long does it take to match MOSFET's in N.C.? Going on 3 months now. Are you every going to finish that amp?:angel:
Cocobola is Poisonous if inhaled. I won't send you any because I know you will try and smoke it.:clown:
See you in Texas.:D |
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| Panelhead |
[QUOTE]Originally posted by MikeW
[ How is the Green Monster working?
It is working great. It gets pulled out of the closet and listened to for a few days about once a month. It is richer and rounder sounding than my Le Monstre.
I keep waiting for KK to release his mini AX boards. That is my next mosfet project.
A Krell KSA-50 clone is planned also.
For some reason I bought a Forte 1A. Have not hooked it up yet. If it does not work well with the Lowthers, the chassis will come in handy.
I spend more time dialing things in than building. Seems six months is needed to get something where I am happy, then the boards get yanked and something else goes in the box.
I need to send the Green Monster to a good home where it will get more attention. Getting out of the closet once a month just is not enough.
You are a real amplifier building machine. And I know this is your season for cranking them out.
George |
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| Nelson Pass |
| quote: | Originally posted by MikeW
The PLH is another amp. It is a variation on the JLH. The guy that is working on it is very busy so it could be a while before it gets done. |
I hope you're talking about my project. I would be unhappy if
somebody else was building the PLH. :cool: |
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| MikeW |
I am.
I didn't want to be a name dropper.:devilr: |
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| jam |
Mike,
Nelson Pass is not another "guy" he is refered to as the Master or Mr.Pass and in some circles as god ,with a small 'g'.
You are tempting stray bolts of lightning...............:D |
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| jacco vermeulen |
I saw a picture of God, he is not green.
So, you are welcome to ask him for a drink ! |
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| Blues |
| I think that would be Cocobolo...of the rosewood family. A hardwood with really nice reddish tone mostly used for furniture and woodworking tool handles. |
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| MikeW |
I think that would be Cocobolo...of the rosewood family. A hardwood with really nice reddish tone mostly used for furniture and woodworking tool handles.
You are right. Also for Amp front panels.
I have another piece for the PassLH.:D |
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| Blues |
Where did you get them Mike? How much per board(size)? Always wanted that wood for front panel.
Allan |
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| Blues |
| Thanks Mike for e-mail and eLarson. |
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| mpmarino |
Nice Job MikeW..
I am currently building a Aleph 30 or something like that. I never built an amp but know a thing or two about electronics and metal/wood. I am also 'North of Boston'. If I run into a snag I can't get out of could I consult w/ you? Email (or other) I will be nearing completion sometime in the summer of 2012 in my estimation.:xeye:
Marc |
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| MikeW |
No problem e-mail, call, or come over. I always have an extra amp or two if you want a demo. :D
:santa2: |
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| eLarson |
| Is PLH another name for The Monster, or another project? (One to be published?) |
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| MikeW |
Nelson Pass is not another "guy" he is refered to as the Master or Mr.Pass and in some circles as god ,with a small 'g'.
You are tempting stray bolts of lightning...............
Mr. Pass liked the JLH when he listened to it. He has a couple of ideas for upgrades. Great minds think alike, so I have no idea what he is going to come up with.;)
I know I will build one.:smash: |
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| jacco vermeulen |
Mr Pass likes way too much.
With his seven easy pieces he got me ordering a GC from BrianGT,
i am so embarrassed.
Is it possible to change user names ? |
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| eLarson |
| Very, very cool. I'm already accumulating the parts for a JLH. |
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| MikeW |
| quote: | Originally posted by Nelson Pass
I hope you're talking about my project. I would be unhappy if
somebody else was building the PLH. :cool: |
Did you pick out the wood for the front panel?:clown:
http://www.righteouswoods.net/pink_ivory.html |
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| chris ma |
| quote: | Originally posted by chris ma
May be that is the one and only LH enhanced version?:cool:
The Butcher:D |
Well SIR,
How is the PLH coming along? The soldering iron is getting cold:( |
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| Nelson Pass |
Variac has donated a Hafler chassis, and I also have a donated
Adcom 555 chassis so that we can make this a nice upgrade
project for those of you with these in a closet somewhere.
It's simmering on the burner, but I suggest you build something
else while you're waiting. These things take months. |
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| MikeW |
| I am saving some heatsinks. What voltage rails? I'll start building the power supply and chassis after the A-40. |
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| Nelson Pass |
At the moment, there are several versions, but they all
allow parallel output devices, so the choice of wattage is
arbitrary. The first version will undoubtedly have a single
rail supply, and from that and the fact that it will be have
the efficiency characteristic of a conventional Class A amplifier
swinging rail to rail, you can calculate the approximate power
supply. |
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| Variac |
| quote: | | or those of you with these in a closet somewhere. |
There must be thousands of these around. That will be a great service to the Diy community.
If Nelson doesn't decide to sell boards on his website, I will coordinate a group buy in gratitude for getting my amp upgraded. Er, Nelson , you ARE going to sign it with a marker, right? |
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| GRollins |
Months, eh?
At the rate I'm going with the Monster front end, you'll still probably finish before I do. I've only managed about two hours total on electronics this week.
Bummer.
Grey |
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| Nelson Pass |
I don't have any problem doing a front end when Casey and
Dave finish the power supplies and output stages. It is my
intention to have a modular front end that will drive the system,
and this is the most interesting part of the project, as I have
maybe 8 circuits or so from which to choose.
:cool: |
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| MikeW |
It has been months.
I'll have to give Big Paul from OCC to come over and give you the size 12 is the ***. :clown: |
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| Nelson Pass |
I have a wife for that, thank you, and I don't see how that
will impact Casey and Dave.
:cool: |
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| Variac |
| quote: | | but they allow parallel output devices, |
So I guess if you have 2 Haflers ( a surprising number of people seen to ;)) , you could rig ea. one up as a monoblock with twice the power? |
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| MikeW |
| quote: | Originally posted by Nelson Pass
I have a wife for that, thank you, and I don't see how that
will impact Casey and Dave.
:cool: |
I was referring to Grey. :devilr:
You will have to use your own size 12 on Casey and Dave.
:bigeyes: |
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| GRollins |
Et tu, Brutus?
Trust me, I've got a lengthy list of things I want to get done, but at the moment I'm spending the vast majority of my soi-disant free time doing farming related things. Got to get all the little veggies started now that freeze time is past. I'm also in the progress of building my daughter a play dingus out in the yard, but that means that I've got to plant grass, which means I've got to...
It's never just one thing. My life is a series of domino events, one keyed to the next. Once I get involved in something it invariably turns out that I've got to back up and do six other things before I can do what I originally set out to do.
Grey |
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| MikeW |
| If you run the cooling pipes from the Aleph under ground you could plant earlier.:hot: |
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