|Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum|
Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|5th February 2012, 01:51 AM||#1|
Join Date: Feb 2012
" tube DAC dilema"-overheat resistors
SOS-HELP-AIDE-HILFE on " DAC dilema"
Hello, new here and a tech advise needed for dilema on a tube DAC on my learning table.
I'm not technician, but I really enjoy play as tech on the basics, learning first, then to the table.
I have an California Audio Labs Tempest tube cd player (first edition,single chassis).
The problem is in the tube dac board, on left channel 2 parallel resistors # R114 & R115(1.5k 4w each value) instant overheating(really hot) after ON and no output sound. I inverted resistors from left channel to right channel and problem still on left channel and tested out board both channel resistors and all measure 1.5k ohms, but installed the ones for left ch measure 6.750R instead 7.500R
The problen go after unit left for 2 days ON, and next time no sound and found the overheating resistors.
Looking what it is causing that overheating, I change new tubes and most electrolytic capacitors and nothing change. Revised carefully the rest capacitors for posible leak sign.Transformer and Bridge Rectifier measured that are OK.
So that my " DAC dilema"- SOS-HELP-AIDE-HILFE
Thank you in advance for any posible diagnostic.
Iincluded 2 photos of the board.
Last edited by kkstereo; 5th February 2012 at 02:24 AM.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|The DAC "do you have experience with this dac", Best diy dac for the money?||murphythecat8||Construction Tips||9||17th March 2014 07:30 AM|
|SOS... problems with Lehmann BCL ("Lovely Cube")...||Miky2011||Solid State||2||31st October 2011 10:53 PM|
|Modern PC DAC vs "Audiophile DAC"||TheLaw117||PC Based||140||17th September 2011 04:24 PM|
|What makes an amplifier "bright", "warm", or "neutral"?||JohnS||Solid State||51||13th December 2009 06:42 PM|
|New To Site?||Need Help?|