Light Dependant Resistor

Wammer
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About Light Dependant Resistor

  • Rank
    Wammer
  • Birthday 20/03/1958

Personal Info

  • Location
    New Zealand

Wigwam Info

  • Digital Source 1
    yamaha CDRhd1500
  • Digital Source 2
    pioneer PDS502
  • DAC
    AS DSM 3 input
  • Pre-Amp
    LDR stereo-coffee
  • Power Amp/s
    Quad 303, Quad 405
  • My Speakers
    ESL57
  1. Mary Hallock Greenewalts invention from 1919 , the rheostat, was never intended to pass audio signals. The fault is a worn part , PFM covered potentiometer distortion here: https://pinkfishmedia.net/forum/threads/alps-potentiometers-gain-and-distortion.68076/ there are much better alternatives.
  2. Hi I commenced a thread at AOS about assessing if you have a component that gets close or in most cases far away from being transparent. It suggested using a source component with separate level controls for left and right, sending the shorter path directly to a power amp, then the longer path would reveal if indeed your component under test was a straight wire, or in most cases not. If it was a straight wire your stereo presentation would be retained. http://theartofsound.net/forum/showthread.php?44457-Using-our-aural-ability-with-stereo-hearing-to-assess-equipment It is a little different to your question. To answer your question audio with respect to depth and other spatial nice attributes gets lost in components altering volume. Ignore what happens there, and sadly you won't get it back.... ( ever ) Cheers / Chris
  3. Hi Taff I see you have settled on a product already. With power supplies whilst you immediately think of voltage only, you should instead firstly think of current and define how much current is sufficient for your application. Adjustable and Fixed voltage regulators happen to make exceptionally good current regulators. They will typically reduce voltage approx 3v so from 12vAC once full bridge rectified and sufficient capacitance = 16.97v DC you would get 13- 14V. Their connection is arranged with the device output having resistance arranged back to the reference voltage terminal, so the reference voltage expressed as vref is divided by resistance with the output taken from the LM317 its adjustment terminal and the 7805 from its ground terminal. With the common TO220 case devices each with writing facing you a LM317 is adjustment , out, and in.... and 7805 in, ground, out Hope this helps Cheers / Chris
  4. Hi We have just released a new board set to our expanding range of kits, this one is a balanced stereo single input kit. With balanced audio there is separate path for positive phase and negative phase of audio signal and ground, Balanced outputs on CD players and inputs on power amps is a feature of professional audio equipment, and XLR plugs and sockets are usually used, With all of our kits you are assured of hearing everything the artist recorded. http://stores.ebay.com.au/stereo-coffee Cheers / Chris
  5. We would love to make it to the Scalford Show on March 29th, and those attending will have the opportunity to hear many different approaches to audio. With this in mind, let us know if anything is heard that gets close to the audio quality of our stereo coffee kits. A recent customer let us know " The resolution is just breathtaking" Our three input and single input kits are available here: http://stores.ebay.com.au/stereo-coffee Cheers / Chris
  6. Hi A busy February for us here at stereo coffee kits, we did a 5 input 3 output custom build, a dual mono build, and a cased version with remote control. We received some nice feedback " It sounds incredible...or, rather, sounds EXACTLY as the source material does " Our single and three input kits are available here: http://stores.ebay.com.au/stereo-coffee We look forward to assisting your musical enjoyment. Cheers / Chris
  7. Our latest circuit boards now feature Left Right trims for achieving perfect stereo balance. We also offer to update previous boards, if postage paid each way. http://stores.ebay.com.au/stereo-coffee Cheers / Chris
  8. Hi Des Toroidal transformers are more efficient than the cheaper laminated E-I types for a similar power level. Other advantages compared to E-I types, include smaller size (about half), lower weight (about half), less mechanical hum (making them superior in audio amplifiers), lower exterior magnetic field (about one tenth), low off-load losses (making them more efficient in standby circuits), single-bolt mounting, and greater choice of shapes. So if safely wired they are a good choice. However if there is any doubt about how wired,then a wallwart type is recommended. Cheers / Chris
  9. Easiest is using a low noise regulator that has facility for plugpack supplied AC 12v input, or DC 15v input http://www.ebay.com/itm/Ultra-low-Noise-40-V-Adjustable-Voltage-Regulator-Module-1-25-20V-1-5-Amp-/201194667431?pt=US_Amplifier_Parts_Components&hash=item2ed822fda7 These regulators work very well with our kits. Cheers / Chris
  10. Second image shows how the stereo coffee circuit boards are arranged underneath, the battery fits where the original transformer was placed, and a charger circuit is fitted as well. To select inputs Disc is CD, Radio 1 is Input 1 and Radio 2 Input 2. During recharge The LDR supply is switched out with cancel and switched in with the 10k button. From what was a average sounding preamp its owner is enjoying a new clarity of sound.
  11. Here are those images of the Quad 33, the first image shows front panel, the dual LED on the QUAD logo shows battery state as OK as Red and turns blue for recharge,
  12. Hi We have re-opened our eBay store, so two locations http://www.stereocoffee.com that similarly links safely to Paypal via shoplocket and eBay http://stores.ebay.com.au/stereo-coffee Cheers / Chris
  13. Some comparisons with other LDR attenuator, and switched attenuator and an active valve pre amp here: http://theartofsound.net/forum/showthread.php?33176-Pre-Amp-bake-off-What-Happened post 1, 19, and 28 being contributions by the persons other than one who were present.
  14. My 1961 ESL57's are still going very well, I use them every day, a service of the crossover network in 1998 has been the only repair required.
  15. Hi Des Thank you for purchasing using our new website: http://www.stereocoffee.com your requested 2 stereo input order, is on its its way to you. Cheers / Chris