The Dynaco Tube Audio Forum

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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


2 posters

    PH-14 Phono PCB

    Udo
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    Udo


    Posts : 3
    Join date : 2019-12-19
    • Post n°1

    PH-14 Phono PCB Empty PH-14 Phono PCB

    Post by Udo Thu Apr 02, 2020 3:09 pm

    I finished assembling the VTA SP-12 with the PH-14 phono addition. I'm getting a loud hum and no output when in the phono selection. I think that I have the PH-14 inputs and outputs wrong. The schematics and diagrams supplied with the kit are a bit vague. Does anyone have a better diagram or a photo showing those connections at the PCB. I would be grateful.
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    DavidR
    DavidR
    DavidR


    Posts : 156
    Join date : 2017-08-10
    Location : MetroWest, MA
    • Post n°2

    PH-14 Phono PCB Empty Re: PH-14 Phono PCB

    Post by DavidR Fri Apr 03, 2020 4:22 pm

    I would say that the audio signal IN is on the side of the PCB next to V1.
    Power supply IN is on the opposite end.
    I'm going by a somewhat fuzzy picture of a blank PCB.
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