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 Post subject: DIY PREAMP KIT
PostPosted: Sun Apr 26, 2015 12:09 pm 
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Joined: Tue Aug 19, 2014 6:20 am
Posts: 16
Location: niagara falls, ON, CA
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Attachment:
006.JPG
006.JPG [ 193.89 KiB | Viewed 2573 times ]
Attachment:
PS 200 WIRING.png
PS 200 WIRING.png [ 29.07 KiB | Viewed 2573 times ]
Attachment:
PREAMP CON.png [21.38 KiB]
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Hello cam members I am hoping someone could help me understand how to wire a transformer to power supply to preamp board . these are the instuction that came with the kit
      power supply
      1. Solder all the components according to the schematic, part list, and photo. D1 uses
      1N5378B (100V Zener diode) for 190-380V, whereas D1 uses 1N5383B (150V
      Zener diode) for 250-450V DC. Also, notice the direction of the Zener diodes and the
      polarity of the high voltage capacitors (C1, C2, C3, C4, C5, and C6). Either solder
      optional diodes D8 and D9 or not if use the rectifier tube (6X4, 5Z2P, 5Z3P)
      2. Short the L1 if not use the optional choke.
      3. Plug the rectifier tube 5Z2/5Z3/5U4/6X4 only or using D8 or D9 only. Connect the
      secondary wirings of the power transformer to the board: apply two
      280/320/360/400V AC with center tap to J1 (e.g. 280V-0-280V, starting from the
      lowest voltage first before everything works fine); For J2, apply 5V AC if use
      rectifier tube 6X4 or 6.3V for 5Z2P/5Z3P; Apply 6.3V AC for J3; Apply 12.6V/15V
      AC to J5.
      4. Measure the voltage at C1 or L1, it should approximately equals to Vin /0.7 DC; and
      also there are some DC voltages at J6 and J7, where Vin is the input AC voltage.
      5. The output voltages can by adjusted by resistor trimmers VR1 for high voltage, and
      VRA1 and VRA2 for low voltages.
          preamp
            1. Apply power supplies without plugging in the tubes, there are 12.6V DC to HT
            connector, either one or two 260V DC to HV connector, and 6.3V AC to connector HT2
            connector (This one is AC voltage, do not short pin marked with ‘0’ to the ‘GND’).
            Check again the voltages of the connectors, they should be HT (12.6V DC and HV
            (260V), with reference to Ground, whereas HT2 (6.3V AC).


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 1:24 pm 
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            Joined: Wed Jul 23, 2008 5:04 pm
            Posts: 1722
            Location: saskatoon, SK, CA
            Do you have an actual schematic?

            Do you have a project that is less likely to electrocute yerself?


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 1:29 pm 
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            Joined: Wed Sep 14, 2005 11:47 am
            Posts: 3825
            Location: Ottawa, ON, CA
            Although its simple - its important not to make a mistake.

            For North American use, on the Primary side, the 2 reds wires should be connected together.
            and the 2 black wires should be connected together.

            Looking at the transformer - it seems the red wires should be used for the "hot" and should be fused.
            The black wires should be used as the neutral.

            Both the Hot and Neutral should be connected to the power switch.

            Do you have a schematic ?
            If so it would be best to post it.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 1:36 pm 
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            Joined: Fri Jan 07, 2011 1:17 pm
            Posts: 2401
            Location: Not Toronto, ON, CA
            Big + 1 to the schematic requests. Tube equipment plays with some crazy voltages and wouldn't advise taking the wiring lightly. Do you have a bulb tester or anything?

            -- 26 Apr 2015 21:36 --

            Big + 1 to the schematic requests. Tube equipment plays with some crazy voltages and wouldn't advise taking the wiring lightly. Do you have a bulb tester or anything?

            _________________
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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 1:42 pm 
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            Joined: Tue Aug 19, 2014 6:20 am
            Posts: 16
            Location: niagara falls, ON, CA
            Attachment:
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            Attachment:
            sl-1 preamp.png
            sl-1 preamp.png [ 47.51 KiB | Viewed 2507 times ]
            yes here are the schematics

            -- 26 Apr 2015 21:56 --

            Attachment:
            002.JPG
            002.JPG [ 277.95 KiB | Viewed 2491 times ]
            don,t know if this will help but this is where i am at now


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            ps 200 schematics.png
            ps 200 schematics.png [ 83.97 KiB | Viewed 2507 times ]
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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 2:46 pm 
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            Joined: Wed Jul 23, 2008 5:04 pm
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            Location: saskatoon, SK, CA
            Were the boards stuffed?


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 3:34 pm 
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            Joined: Mon Nov 29, 2004 9:43 am
            Posts: 11
            Location: Ottawa, ON, CA
            I find the first step confusing and maybe it has a typo:

            1. Solder all the components according to the schematic, part list, and photo. D1 uses
            1N5378B (100V Zener diode) for 190-380V, whereas D1 uses 1N5383B (150V
            Zener diode) for 250-450V DC.

            There are two references to D1, could they be referring to D1 and D2 instead if D1 twice?. It is hard to read the schematic as the
            letters and numbers are too small for me to see if there is a D1 and D2 or just 1 D1.

            I think that one key to understanding the hook up is the first attachment with the transformer wiring. It shows the connections for the different possible high and low tension voltages for the circuit. The 6.3 voltage is a typical voltage for a tube heater like a 12ax7 and many others.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 4:13 pm 
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            Joined: Sat Jul 04, 2009 6:08 pm
            Posts: 18450
            Location: Montreal, QC, CA
            crgolfer wrote:
            I find the first step confusing and maybe it has a typo:

            1. Solder all the components according to the schematic, part list, and photo. D1 uses
            1N5378B (100V Zener diode) for 190-380V, whereas D1 uses 1N5383B (150V
            Zener diode) for 250-450V DC.

            There are two references to D1, could they be referring to D1 and D2 instead if D1 twice?. It is hard to read the schematic as the
            letters and numbers are too small for me to see if there is a D1 and D2 or just 1 D1.

            I think that one key to understanding the hook up is the first attachment with the transformer wiring. It shows the connections for the different possible high and low tension voltages for the circuit. The 6.3 voltage is a typical voltage for a tube heater like a 12ax7 and many others.


            2 references to D1, one for each voltage range. D1 = 100V IF 190-380V OR D1 = 150V IF 250-450V? At least that is the way I read it.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 5:56 pm 
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            Joined: Tue Aug 19, 2014 6:20 am
            Posts: 16
            Location: niagara falls, ON, CA
            There were two different diodes supplied you could solder in either one depending which voltage was required for different preamp board ,I used the 1N5378B (100V Zener diode) for 190-380V , but I have the other diode if needed.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Sun Apr 26, 2015 6:13 pm 
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            Joined: Tue Aug 19, 2014 6:20 am
            Posts: 16
            Location: niagara falls, ON, CA
            Attachment:
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            sl-1 preamp.png [ 61.62 KiB | Viewed 2355 times ]
            Here is a better schematic of the preamp


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Mon Apr 27, 2015 1:54 am 
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            Joined: Mon Nov 29, 2004 9:43 am
            Posts: 11
            Location: Ottawa, ON, CA
            I just checked the Analog Metric website and found the user manual for the Cat SL-1. Procedures #1 has a pic showing the hookup of the preamp. It shows where you need to attached the transformer leads for 12.6 and 6.3 volts ac and 260 volts dc plus the grounds. From looking at the transformer it looks like one white wire would get you the 6.3 volts ac while 2 white wires combined would get you the 12.6 ac.

            The 260 volts dc will have to come from the power supply portion of the kit. It looks like the schematic that you have provided is only for the preamp part of the kit as I don't see any diodes there or any D1 connections. The power supply of the kit will take the 260 volts ac (it looks like the yellow wire) and converts it to 260 volts dc.

            The 260 volts dc is what runs the preamp while the 6.3 volts is for the tube heaters (12au7, 12ax7) so that they will function. I am not sure what the 12.6 volts dc is for, possibly a heater for a different type of tube.

            You might want to check with Youtube to see if anyone has a video showing the hook up.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Mon Apr 27, 2015 3:53 am 
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            Joined: Mon Nov 29, 2004 9:43 am
            Posts: 11
            Location: Ottawa, ON, CA
            Here is a copy of the power supply schematic.

            http://analogmetric.com/download/PS200% ... ematic.pdf

            The instructions are now making some sense. I am assuming that you have the first two steps done. For step 3 it looks like you connect the transformer ground to connection 2 of J1 and a 280 volt brown wire to both connections 1 and 3 of J1. Do you have two brown leads? If not I am wrong.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Mon Apr 27, 2015 4:33 am 
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            Joined: Wed Sep 14, 2005 11:47 am
            Posts: 3825
            Location: Ottawa, ON, CA
            The results of making mistake would not be good.
            So there is concern about giving advise.

            From the IEC connector - there should be a wire from the earth pin screwed down to the metal chassis.
            Is this correct ?

            Are you going with a 6X4 or 5Z2P rectifier tube ?


            On the secondary side of the transformer, confirm there are the following wires.

            320 Vac - Orange
            280 Vac - Brown
            260 Vac - Yellow
            220 Vac - Green
            200 Vac - Blue

            0 Vac - Black
            0 Vac - Black

            200 Vac - Blue
            220 Vac - Green
            260 Vac - Yellow
            280 Vac - Brown
            320 Vac - Orange

            It seems that the 2 black wires on the secondary should be connected together
            for the circuit ground.

            Connect these 2 black wires together and then measure the resistance
            between the Black and 1 of the Orange wires.

            Repeat the process with the black wires and the other orange wire.

            The resistance should be the same.
            If so, the 2 black wires connected together will form your circuit ground.


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Mon Apr 27, 2015 5:04 am 
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            Joined: Tue Aug 19, 2014 6:20 am
            Posts: 16
            Location: niagara falls, ON, CA
            First two steps are done ,going with a 5z2p tube


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             Post subject: Re: DIY PREAMP KIT
            PostPosted: Mon Apr 27, 2015 5:19 am 
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            Joined: Tue Feb 28, 2006 5:40 am
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            Location: Hamilton, ON, CA
            Be aware there is a mistake on the power supply schematic from their website.
            It says:
            5V for 6X4
            6.3V for 5Z2P/5Z3P

            This is backwards.

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            http://www.dtsaudioelectronics.com


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