you know what makes our hobby look cheap? - Page 44 - Dorkiphus.net
Navigation » Dorkiphus.net > Miscellaneous Discussions > Miscellaneous Discussions » you know what makes our hobby look cheap?

Miscellaneous Discussions Off Topic (OT) items that really don't fit into any other Category

Reply
 
Thread Tools Display Modes
  #431  
Old 05-11-2018, 02:25 PM
Charlie Stylianos's Avatar
Charlie Stylianos Charlie Stylianos is offline
Site Admin
 
Join Date: Dec 2002
Location: Arlington, VA
Posts: 2,737
Charlie Stylianos has disabled reputation
Default

Found one of these on the local CL for $25. Will probably pick it up for funzies.

Optimus DCT 2000

http://www.hifi-classic.net/review/o...-2000-117.html
__________________
Kyriakos E. Stylianos
Baglama inspired
1982 SC Targa - (Currently Wallowing for GothingNC)
Reply With Quote
  #432  
Old 05-15-2018, 02:12 PM
jbailey930's Avatar
jbailey930 jbailey930 is offline
Lifer
 
Join Date: Dec 2002
Location: Potomac Falls, VA
Posts: 1,226
jbailey930
Default

Command Performance is hosting an event for Manassas based Doshi Audio. June 2 11am to 5pm. http://doshiaudio.com/about/
__________________
John B
79 930
87 951 (sold/engine in wrong end)
86 911 Targa (sold/missed)
Reply With Quote
  #433  
Old 06-14-2018, 12:40 PM
Charlie Stylianos's Avatar
Charlie Stylianos Charlie Stylianos is offline
Site Admin
 
Join Date: Dec 2002
Location: Arlington, VA
Posts: 2,737
Charlie Stylianos has disabled reputation
Default

Just finished putting together a passive preamp using LDR's. All the hype about removing components from the signal path is true....details galore! I was using a single volume pot before and the difference is definitely audible.

No gain, only attenuation, so you'll need a source with 2VRMS output, or well matched/sensitive amp and speakers.

You can buy retail version here:
http://www.javahifi.com/

Or purchase the components and build you own. Same designer and circuitry used above:
https://stereocoffee.wixsite.com/ldr...dr-kit-details
Attached Images
 
__________________
Kyriakos E. Stylianos
Baglama inspired
1982 SC Targa - (Currently Wallowing for GothingNC)
Reply With Quote
  #434  
Old 06-14-2018, 01:04 PM
}{arlequin's Avatar
}{arlequin }{arlequin is offline
cocainemakesyouthinner
 
Join Date: Sep 2003
Location: la-la land
Posts: 18,230
}{arlequin
Default

whoa, that’s cool
__________________
no.don't.stop.
--if you just want sperm to come out...
one two thweeee! one more cr sp nasa t-3
i used to drove, you've probably never heard of me
Reply With Quote
  #435  
Old 06-14-2018, 01:27 PM
Jazzbass's Avatar
Jazzbass Jazzbass is offline
Site Admin
 
Join Date: Feb 2003
Location: Germantown, MD
Posts: 11,662
Jazzbass has eight HoF threadsJazzbass has eight HoF threadsJazzbass has eight HoF threadsJazzbass has eight HoF threadsJazzbass has eight HoF threadsJazzbass has eight HoF threadsJazzbass has eight HoF threads
Default

That's awesome. I like the parts about the LDRs.
__________________
Chris M
1985 911 Carrera with a couple cosmetic only mods
2006 E90 330i
1999 E46 328i
Reply With Quote
  #436  
Old 06-14-2018, 01:49 PM
Charlie Stylianos's Avatar
Charlie Stylianos Charlie Stylianos is offline
Site Admin
 
Join Date: Dec 2002
Location: Arlington, VA
Posts: 2,737
Charlie Stylianos has disabled reputation
Default

Quote:
Originally Posted by Jazzbass View Post
That's awesome. I like the parts about the LDRs.
I thought you'd get a kick. I was intrigued as well, and at ~$200 it was worth tinkering with.
__________________
Kyriakos E. Stylianos
Baglama inspired
1982 SC Targa - (Currently Wallowing for GothingNC)
Reply With Quote
  #437  
Old 06-15-2018, 10:29 AM
smdubovsky's Avatar
smdubovsky smdubovsky is offline
 
Join Date: Mar 2004
Location: Silver Spring, MD
Posts: 5,207
smdubovsky has three HoF threadssmdubovsky has three HoF threadssmdubovsky has three HoF threads
Default

Following the links the 'LDR' looks like a old CdS photoresistor w/ a light source glued on top? Unsurprisingly there are no datasheets. I wonder the linearity...
__________________
Stephen
www.salazar-racing.com
1970 914/6 - 3.0L GT
1983 911SC - 3.32L IROC
1984 930
2008 S2R1000
2015 Mustang GT (Microsoft SUCKS!)
Sold: 2001 Boxster (hers),
2003 996tt x50 , SpecE30, 1996 E36M3 GTS2 racecar
Reply With Quote
  #438  
Old 07-11-2018, 09:22 PM
Dr K's Avatar
Dr K Dr K is offline
Colorado's finest
 
Join Date: Apr 2005
Location: Montgomery County, MD
Posts: 15,404
Dr K has two HoF threadsDr K has two HoF threads
Default

I ordered one of these just before they ran out (thought about ordering 2 for mono blocks, but it was more money than I wanted for "play").
https://diyaudiostore.com/collection...=7072933085218
__________________
Peter (not "Pete") K.
IndexFingerRacing.com

Vicegrip: "The best way to buy speed in bikes is purchase less food. "

2009 911 C2S Coupe "The Green Car"
1992 Miata ("SSM") race car
2004 Toyota Prius - Back-up DD
2016 Toyota Highlander (wife's DD and my new tow vehicle

Gone and missed:
2006 Dodge Durango - sold to a Dorki
2003 Acura MDX - Just shy of 200K
86 Black 911 Coupe race car (owned 2010-2016)
86 Gold 911 Targa (owned 1998-2012)
82 WineRedMetallic 911 Targa (owned 1986-7)
Reply With Quote
  #439  
Old 07-11-2018, 10:07 PM
Too Tall Too Tall is offline
 
Join Date: Dec 2016
Location: Kensington
Posts: 319
Too Tall
Default

Neat kit Doc. I signed up for the next round.
__________________
Josh Simonds
07' 997.1 Atlas Black
"this ain't tennis, I suggest you figure it out if you plan on doing this sport"
Reply With Quote
  #440  
Old 07-12-2018, 09:42 AM
Charlie Stylianos's Avatar
Charlie Stylianos Charlie Stylianos is offline
Site Admin
 
Join Date: Dec 2002
Location: Arlington, VA
Posts: 2,737
Charlie Stylianos has disabled reputation
Default

^^ I've been getting emails about those also, but already have SS amps as well as "low" wattage.

I did bite the bullet last week to see what the Class D hype is all about. TI has their TPA325x series evaluation boards available for 50% off with coupon code "highpoweraudio". I ordered the TPA3251 (170W stereo) and received it yesterday. Connected it to a simple switching power supply and in 5 minutes was listening. It sounds very nice, seriously. +80% efficiency and more power than I can handle. $110 minus the shoebox I stuffed it into, it can't be beat. Would make a great foundation for bedroom/secondary setup, and I'd honestly be happy with it if it were my only amp. Class D is the way of the future, and folks like PS audio are already using this technology (ICE Power chips) in their "audiophile" quality amps/lineup.
__________________
Kyriakos E. Stylianos
Baglama inspired
1982 SC Targa - (Currently Wallowing for GothingNC)
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump