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#21
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Re: Help Phono 2 PSU HT High
Quote:
will try not to fry this one day one and the count down begins plase you bets now
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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 |
#22
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Re: Help Phono 2 PSU HT High
Hi all
OK CF pre up and running playing music WD PSU 2 phono HT out is 347v preout HT is now 212v under load Pre valve anode is 155v due to a resistor and extra 100uf cap in the pres umbilical cord i think However, I can only plug one input in at a time switching from phono input to CD is making the speakers oscillate and sound terrible unplugging the phono and CD works fine And vice versa I also got a belt when unplugging the phono not good Any ideas as to what is happing This is Strange too input selector input 1 is not switchable it’s direct through input 6 is on selector 3
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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; 15th February 2014 at 11:25 PM. Reason: Added Text |
#23
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Re: Help Phono 2 PSU HT High
Have you connected one input to the tape out socket Colin?, I know there are no markings on the back panel, not wanting to offend you, looking from the rear of pre, from left to right, the socket inputs are Phono, CD, Tuner, Aux, Tape in and Tape out,there is no mute, it all worked fine this end, and because of the PCB input, its impossible to go wrong, or am I reading your post incorrectly. I would also lower the voltage to Phono, it should be 250v, I did give you some 18k resistors for that. Think you need to go over PSU again, I take it that you have build instructions, if I can help, don't hesitate to ask. BOB
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#24
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Re: Help Phono 2 PSU HT High
Hi BOB
AH right I was looking from the front left to right I have now label the input temp for now I had forgot all about tape loops these days , all input now working fine by the selector switch But we have a gain issue between phono and CD volume the phono Volume 10/11 o’clock CD @ 2/3 o’clock And all but the phono inputs have a mains hum @ End of Pot Travel PSU Pre HT Out 212v under load Valve Anode voltage @ 155v need to change the resistor in the Pre can you suggest a new value to bring the voltage up to nearer the 200v PS Yep forgot to change out the 18k for the phono job is in hand
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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; 16th February 2014 at 02:44 PM. Reason: Added Text |
#25
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Re: Help Phono 2 PSU HT High
Quote:
Ohms law dear boy. Work out the voltage drop across the present resistor = current. How many volts do you need to drop = voltage Ohms law will give you resistance.
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Philip. Everything in this post is my honest opinion based on what i thought I knew at that very moment in time. |
#26
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Re: Help Phono 2 PSU HT High
Hi Colin, and all, I use 1k resistor in both pre and phono, voltage taken from anode= 194v, voltage across the valve= 110v, Neal says 95-100 volts across valve so not far out. Cant understand how you need more volume on CD (2volt) my volume with CD is at 11 to 12oclock and that very loud, , Phono just a tad more. Switched mine on this morning, full volume, just a small amount of noise. What power amp are you using?. BOB
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#27
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Re: Help Phono 2 PSU HT High
Hi BOB
Yes it maybe the DAC and the FET buffer that is dropping the out vol its not so bad thought Phono out is fine The Amp is my Je labs SE 6SL7/KT66 with its volume pot removed so is now a power amp which has a 0.1uf poly and grid resistor fitted now The noise on the pot end stop is what I take to be DC not sure why thought but it’s at the full volume stop so likely not an issue Even with the lower Anode voltage, I like its sound works well On load HT now 265v on phono and 220v on pre Yes, I have 1k in phono so will fit it in pre as well
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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 |
#28
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Re: Help Phono 2 PSU HT High
Well today I Changed out resistor on Extra cap in the CF pre for a 1K Also added a 0.1uf poly bypass cap to the extra 100uf Cap
New Voltages PSU HT 210v All other Voltages are in Red Text See Schematic are about right
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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 |
#29
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Re: Help Phono 2 PSU HT High
Opps forgot to say which Valves i used 6922/6n1p see updated Schematic for voltages
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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 |
#30
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Re: Help Phono 2 PSU HT High
Hi All
Well last night I decided to try a bigger choke in the WD PSU 2 This has made a clear difference to the sound of both pre and phono2 in my system the inky blackness is blacker and low level detail come out cleaner and sound stage seem deeper
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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 |