DIYers @ Wiredstate

For the serious and not so serious in audio: DoItYourself and Tubes (SET, PP, Vintage).

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Postby arnoldc » Wed May 04, 2005 5:26 pm

session! session! :D
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Postby Jon Agner » Wed May 04, 2005 5:43 pm

Adobo session? sali ako diyan :)
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Postby red76 » Wed May 04, 2005 8:21 pm

Thanks guys,

Credit goes to Bon for tackling a slightly more complicated job of making folded pipes (Tama ba Bon? ML Straight Pipe yung Boink AFAIK)...

Sound? Hmmm... It has visceral midbass dynamics, grand piano, upright bass, and violoncello sound very convincing. Maybe this is due to the Karlson slot? Most probably. Midrange is almost tangible.. But still not in the league of the top tier midbass and midhigh compression drivers (in well designed front horns) of course...

troporobo,

The side and top panels do resonate but not by a large margin. There is a long brace at the inside back panel from top to bottom and also at the front (you see it inside the Karlson slot/vent). The recommended brace is 1" x 4", but due to lack of good wood we just used 3/4" x 4". The narra ply I bought was far from perfect, that's why Bon had to make do of what is usable, pili na mga parte kumbaga... Some parts of the outer surface of the narra ply veneer have blemishes that cannot be patched up with natural/neutral varnish... But I don't want to be overly obsessed over perfect cosmetics/aesthetics, I'm borderline anally retentive as it is already... :x :lol: BTW, the edges are made of pine. There should be enough polyfill lining behind the driver back chamber, at least an inch to avoid early reflections to the cone and excess backwave turbulence. There is a way to test adequate stuffing density, it's called the "AAA battery test".. I still have to ask a French-Canadian dude who told me about this and what it entails. The critical part though is not to block the "throat" after the chambe with stuffing, as the designer advised. The transition pathlength from back chamber down to the mouth exit is short and not complex. The Kralson slot has a radius of 38.91 degrees.

Wala pa palang platform/feet/spikes ito so I use temporary Lovan spike rests/discs to lift them up the marble floor a bit to avoid the cab resonance feedback creeping up and muddying the midbass. I could try 3/4" wooden platforms to. There is much potential with this design....

The drivers are vintage Coral alnico jobbies.. They are actually more suited to OB or large aperiodic enclosures (leaky cabs), but they still do manage to sound "good" in the Pipe. Check out the OB forum. When funds allow I would try the Supravox 215 RTF64 (NOT the Sigs) in them and use my vintage Fostex cast horn tweeters on top. I'd still keep the Corals, OB's are up next... Bon may have a source of very good quality ply soon, we still have to see pag na tistis na yung kahoy.

A big thanks to Bill Woods for sharing his design online for diy'rs....
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Postby Killer Mike » Thu May 05, 2005 9:52 am

Red, astig na astig ang dating :D congrats!
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Postby BonD » Thu May 05, 2005 8:57 pm

Thank you bro... :)

Happy Birthday! :)
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Postby Jon Agner » Fri May 06, 2005 11:03 am

Handyman wrote:Thank you bro... :)

Happy Birthday! :)


Sinong may BDay ngayon? Si Red?
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Postby T-Rex » Fri May 06, 2005 11:07 am

happy bday din!
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Postby arnoldc » Fri May 06, 2005 11:09 am

aba fred, pa canton ka naman! :D happy beerday :D
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Postby dogears » Fri May 06, 2005 1:08 pm

unga! happy bday! :D
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Postby red76 » Fri May 06, 2005 4:37 pm

arnoldc wrote:aba fred, pa canton ka naman! :D happy beerday :D


Pag birthday ni Mike dun ka umasa ng pa canton.. Balita ko masarap mag pa canton yun. :twisted: :D.. Sabi nga ni Bon red wine (southern comfort or jack daniels on the rocks ok na din) nalang para iwas laki waist line... Pero pass muna mahina kidney and atay ko ngayon.

BTW, Deathclcock ko: Feb. 15, 2050...

Thanx sa mga maligayang bati(bot).. :)
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Postby Killer Mike » Fri May 06, 2005 10:07 pm

kulang lang yan sa canton :lol: mura pa! :twisted:
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Postby red76 » Mon May 09, 2005 6:14 pm

'J-Audio' made me 2 pairs of internal speaker cabling - braided imported magnet wire ... Sorry for the bad resolution of pics... Hirap kunan ang makintab na enamelled copper (have to get lessons in photography - pero baka ma adik mangolekta na rin ako ng mga Hasselblad at Leica, etc.).

Before, braided carefully with just the right tension...

Image


and After a careful 'sleeving technique'....

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Postby Killer Mike » Wed May 25, 2005 10:57 am

Push Pull 6550, 50 watter :)
Tubes : Svets 6550, Raytheon 6sn7, Telefunken 12ax7 sp :)

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845 SET, 20 Watter :)
Tubes : Valve Art 845, RCA 5692 Red Base, Jan 12at7WC :)

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Postby JojoD » Wed May 25, 2005 6:01 pm

Master Mighty Mike,

I salute you! Galing mo sir. ;)

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Postby vintage_dog » Wed May 25, 2005 6:03 pm

congrats mike...may the force be with you...
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Postby Killer Mike » Wed May 25, 2005 9:41 pm

Thanks! More projects coming soon :D

Masta JD, ilabas mo na yang mga itinatago mo :P :twisted:
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Postby mozilla » Mon Jun 06, 2005 2:12 pm

I've been very busy but here's the latest incarnation of my NOS/Digital Filterless-Dac. Batt pack, charger and DAC are now in one chassis.

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LED changes colors depending 3 modes: charge mode, full power and almost drained mode (2 hrs. of play left)
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Optical and coax inputs. Power in for charger. Fan is used while charging as IC gets quite hot.
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Postby Superman » Mon Jun 06, 2005 2:35 pm

nice work, mozz!... 8) 8) 8)
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Postby dogears » Mon Jun 06, 2005 2:45 pm

Hey Grant, galeng at dalawa na ang batts :D
I'm still waiting for my batt charger. Nagpabili na lang ako :P

oops, isang batt lang pala :P
Last edited by dogears on Mon Jun 06, 2005 6:34 pm, edited 2 times in total.
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Postby Superman » Mon Jun 06, 2005 2:46 pm

Superman wrote:nice work, mozz!... 8) 8) 8)


by the way, sent you an SMS...thanks!
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