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#11
1st May 2014, 09:26 PM
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Re: WD/WAD PSU PHONO II Choke upgrade
Good to see the Hammond choke upgrade is liked
 Here is how it happened It was just a pure chance I fitted it when I was upgrading the PSU II to feed the CF Pre So had I not fitted the wrong Zener Diode which gave me 100 volts instead of the required 200volts this lead me too recheck the HT across the WAD Choke and checking the DCR so all was fine with the choke So fitted the correct Zener this time and all was good 210volts to CF Pre I then checked the phono HT, which has always been a bit high so knowing the DCR of the WAD Choke the light came on, wait a minute I have a Hammond 157G Choke, which has a higher DCR so fitted it in place of the WAD choke phono HT drops a little Well you know the outcome of this upgrade  
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 The Blues man   Turntable Rega 3 custom RB250 with ortofon 2M Blue /other goldring 1042 /WD phono2 /WD CF pre custom converted /WD psu2 /home built JE Labs Single Ended 6SL7/KT66/Speakers Frugal horns Mk1s Other turntables AR EB101/Thorns TD150mk2/Thorns TD160mk2 If you have trouble reading my posts its because I am a dyslexic member Last edited by colin.hepburn; 1st May 2014 at 09:44 PM. Reason: Added Text 
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