Arash
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Posts posted by Arash
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On 3/16/2020 at 5:27 PM, Dave A said:
Here is a picture of real BB. All the plys are the same thickness. If the lumber yard told you they were selling you BB they misrepresented their product.
We always use this kind of Baltic Birch Plywood the premium quality. Iran is close to Russia and we have access to this material made by Sveza much cheaper than in the US. there is also Wisa of Finland which is more expensive than Sveza and have that little bit of extra quality.
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15 hours ago, JBCODD said:
Try a residential type vacuum with the brush attachment.
thanks for the tip. I'll see if my vacuum cleaner has one of these brushes.
15 hours ago, Randyh said:compressed air can do very well , just turn down the pressure a bit , and use a small paint brush , gently as you blow the AIR , DO NOT USE ANY WATER ----ONLY AIR AND A GENTLE PAINT BRUSH TO DISLODGE THE DUST , for the metal surfaces , use rubbing alcohol
I thought of that. I'll try and I have to be extra careful not to break the diaphragm.
thanks,
15 hours ago, mustang_flht said:I've already done cleaning like that, it's perfect!
thanks,
15 hours ago, Randyh said:a vacuum can pull on the cone , and deform it , as well as the dust cap -
I know I know. I'll take care of it.
15 hours ago, mustang_flht said:No air vacuum with the brush, do not press. The engine must be adjusted weakly. For more security, the air exhaust from the tube must be left a little open!
For inaccessible places you can use a soft brush and a little further hold the brush of the vacuum cleaner running gently. The dust will fly with the soft brush and then be sucked a little further.
thanks for the tips.
15 hours ago, jimjimbo said:Wow.
I watch CNN int. every morning... ha ha... 😮
14 hours ago, garyrc said:For years and years there was a marvelous, probably homemade, old speaker up on a high shelf next to the always-open doorway of a bookstore called RamBam (i.e. Moses ben Maimom, aka Maimonides) on the corner of Dwight and Telegraph in Berkeley. Later, the bookstore was sold, and became Shakespeare and Company. The speaker stayed, playing away, entertaining all of us who would stand in front of the magazine rack reading I.F. Stone's weekly, Commentary, and the like, for free. The grille cloth started out yellow. By the time I left the area (after about 40 years) the part of the grille cloth that was in front of the woofer was black with dust, dirt, tobacco smoke, that other smoke, car exhaust from the street that was right there, and from time to time, tear gas, that had been sucked in by the magnet. Hopefully, the speaker with the dirty yellow grille with the big dark circle in the center is still there.
some speakers have a long journey indeed. like my late grandpa LS
4 hours ago, Skelt said:I, for one, am glad to see @Arash is able to post again considering the current state of afairs of his home country.
thanks for your kind words.
3 hours ago, DizRotus said:Hello again friend. The advice above is good. No water, gentle vacuum, and brushes.
Hi there,
thanks for the tips. I will use no water for sure.
2 hours ago, Coytee said:or.....send it back to Bob as defective?
Hmmmm......
😁
2 hours ago, glens said:Wipe off the frames and play 'em loud. That'll shake the dust off of the moving parts. ;^)
that's wise! I'll try it. thanks
1 hour ago, Schu said:How are things in Iran?
nothing remarkable. just dealing with deadly virus outbreak.
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15 hours ago, wvu80 said:
Arash! How are you, my friend? I miss hearing from you. How is business? How are things on your side of planet earth? I depend on you for real news as our media people are not always truthful and put a political bias on what they report.
You, I trust. -Dave
Hi there,
Actually we are doing just fine and we are also trying to stay away from the Coronavirus. In Iran it's new year holidays and I'm busy with the distillation equipment we got to make some rubbing alcohol from sugar wash.
I hope you are doing fine there. Humankind will get through this.
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Hey guys,
these are CW1526C I acquired from Bob back in 2011. they were never used on a speaker and have been lost for 5-6 years and now I have them back. they have been collecting significant amount of dust for themselves apparently. Please tip me how to clean them? I will give the basket a wipe I want to know how to clean the diaphragm and surround. any help is much appreciated.
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you will love Faital Pro HF10AK + STH100 horn even more
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1 hour ago, Khornukopia said:
Do you have a recommendation for a 2" horn with these drivers when used on a Klipschorn or La Scala?
Edgar style Tractrix horn with cuttoff frequency about 258Hz.
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instead of a two way Khorn I would suggest going three ways with following combination.
you have the woofs already. those are O.K
Faital pro HMF200 or B&C DCM50 (I would not suggest to use BMS 4592)
Faital Pro HF10AK with a Faital Pro STH100 horn or 18Sound XT120 Horn
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rest in peace to a great figure in sound industry who contributed so much to listening pleasure of many audiophiles. His LX521 design was a game field changer indeed.
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go for solid core OCC copper wire and don't look back.
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key thing is to set the total coil inductance above the value needed to result in the coil becoming a low pass for frequencies you do not want.
I think I'm in a language barrier with above quoted sentence. Can anyone please interpret it to me?
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I thought maybe someone else needs something like this so hereby I bump the thread
this thing has saved hundreds of hours of my time during last year
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Hey guys. I almost forgot to post the result here. the machine was completed a few months ago. it's doing what it was designed to do. take a look at video below. the bobbin was deformed due to countless of tests but I have no other video in my cellphone rightnow. I'll upload a better and longer clip of machine in action within a week. In the video below you see AWG#10 copper wire (2.5mm ⌀) and we have tested wires as thick as AWG#5 4.6mm ⌀ with no problem though we may never build inductors with AWG#5 wire! it's crazy
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if finally anyone can provide a 3D scan of K402 I would build it using BB plywood and submit a thread with tenths of pictures for details just like other threads of mine.
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On 7/15/2017 at 7:07 PM, Marvel said:
Oh, I'm still thinking of a flatpack of some sort. I think the precision is possible, and I have mulled over different means of construction.
B.
We recently acquired a big metal milling machine. this machines are super accurate. far more accurate than wood CNC routers. If I had the drawing of K402 I could build it using slices of BB plywood. it would look generous with plywood. something like Eliptrac but with least sanding needed at last assembly stage.
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I'm almost disappointed from getting a pair of K402 from US or finding it's plan to build one myself. I'm gonna try to build my own conical-tractrix horn so see how it sounds on-axis/off-axis. designing a horn with conical beginning and tractrix ending is not something very routine. if you have any idea or tip about this it would be great to share it here.
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On 7/6/2017 at 5:54 AM, efzauner said:
All it would take is for someone to trace the outside on paper... take off 1/16 or so and viola you have the inside shape...
how would you draw an arc on a paper?! you'll be only drawing the area of it not the arc geometry
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we machined another aluminum part for the stepper motor:
we also bought encoder and the stepper motor for ballscrew:
next coming days we are gonna test the machine. we are a little anxious if using an electro motor is a good idea fundamentally. we will test. we may change the plan a little bit and use a huge servo-motor as the main spindle motor. it depends all on the electro-motor and if we can control it's start and stop. I think the electro-motor is fine as almost all other machines all over the world use electro-motor not servo-motors! one way or the other we're gonna find out soon.
Oh! by the way I wanted to share some pictures of liquid ring vacuum pump a knit friend of mine developed here with full circulated system. It works 24-7-365 with almost no maintenance costs. 200Cubic meters/hour (~118CFM).
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15 hours ago, oldred said:
Arash,
That looks fantastic. It is really coming together.
If you don't mind me asking. What method do you plan on using for wire tension.....weight /regulated cylinder/felt drag system?
I am really looking forward to seeing it finished.
Please keep the pics coming.
George,
George,
Thanks for your energetic reply. sure I'll let you guys know how it will turn out at last
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On 6/15/2017 at 1:58 PM, Woofers and Tweeters said:
Nice job on the wire winder.
To share with you what I do, when I can, to make a motor mount.
1) I try to not hang in, and if I have to, I hang the mounting plate low enough to still put the motor on top of the plate
2) I make a hinge mount so that I only have to worry about belt alignment one time, belt maintenance is simplified
thanks for the tips about mounting motors
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the electro motor was installed:
the tailstock was painted and installed:
we also built some of there rollers for wire tensioner:
the tailstock feeder screw parts are also installed and the pneumatic jack is in its place:
mechanical part of the project is almost completed. the wire tensioner is yet to be built. you can see how tailstock feeder works in action:
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the ball-screw was installed:
and it looks like this:
we are gonna build the feedscrew of tailstock bearings:
the ball-screw feeding mechanism turned out to be very accurate. it works flawlessly you can see in this short clip:
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8 hours ago, oldred said:
Arash,
One other thing ....that device in the milling head in the pic of your replacement piece......Is that an edge finder....it looks different than the ones we use in the US.
Thanks again,
George,
that's right. it's an edge finder. we also call it "wiggler".
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8 hours ago, oldred said:
Arash,
I am really enjoying seeing your progress.
As far as the broken tap....Here in the USA ...in the machine building trade.... our saying for broken taps ....is ....(Shit happens)......and it has happened to all of us.
I have been a machine builder ever since I finished my apprenticeship in 1980.....a long .........long time ago.
Keep the pics coming....I am really looking forward to a video of your test winding.
Once again....Great job,
George,
George,
Thanks for your motivation. Yes sure sh!t happens!
Oh man you were a machine builder before I was even born!
Thanks again
Arash,
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On 1/8/2016 at 5:22 AM, ClaudeJ1 said:
I may have access to a 3D laser scanner and a million dollar 5 axis CNC machine after next week. They usually carve piston engines with it, but I'm sure it would be a cakewalk to do a huge block of mahogany, who knows. That is something I would NOT share and there would only be one pair in the world like that, if, if, if.
if you can provide me K402 details I may be able to build a pair for you if you can find a way for shipping
Bob Crites has passed
in General Klipsch Info
Posted
I just saw the news of his loss on his website a couple of minutes ago and deeply saddened. 😢 He was a great guy to deal with... with a big heart... I never met him but had countless of emails to/from him for buying things laden with questions from 11-12 years ago and he was so informative and generous to help me everytime patiently. My condolences. R.I.P.