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#1
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Help Phono 2 PSU HT High
HI All
OK I have been running my Phono 2 for about 5 years plus now knowing phono HT was a little high @367v but phono works fine at this voltage However, today I decided to add the other parts to run my WAD CF Pre So following the CF guide in FAQ I added R4 to 18K add new ZD1 200v diode and 100uf 450v cap HTvoltage off load phono is 367v as before CF HT is the same at 367v Checking voltage of the cathode side off ZD1 364v Anode 270v installed ZD1 as marked on the PCB
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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 |
#2
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Re: Help Phono 2 PSU HT High
Panic over forgot to solder underside of board
New off load Voltages are phone 334v CF HT is now106v the drop is now to low CF calls for 200v under load
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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 |
#3
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Re: Help Phono 2 PSU HT High
I was just looking at your post Colin, saves me getting the books out. BOB
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#4
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Re: Help Phono 2 PSU HT High
Quote:
Hi Bob Yep trying to get that WD CF pre I got from you up and running its been in the loft but WAD PSU Pre HT is now only 106v Off load it would be some think like 220v i think R4 is the 18k as the faq instructions
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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 |
#5
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Re: Help Phono 2 PSU HT High
Dam it i have just wiped my DMM out 100 lines i need to remember to switch back from ohms the DCV luck is its a cheapo DMM **** all work stopped
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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 |
#6
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Re: Help Phono 2 PSU HT High
Sod doing the lines Colin, get caned instead, its quicker. Think you need check the PSU out, you should have 345 no load to phono, 210 no load to PRE, 250 loaded phono and 200 loaded PRE. Cant remember if I put a capacitor and load resistor in PRE?. We all await the arrival of your new meter, Fluke are very good but pricey, but you may never need to buy another. BOB
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#7
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Re: Help Phono 2 PSU HT High
Hi Col shouldn't the anode be at 0V? Is signal ground missing or made by an external connection?
Ah, see you found it |