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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

    FM2-A insert

    baddog1946
    baddog1946
    baddog1946


    Posts : 319
    Join date : 2010-02-03
    Location : Costa Rica
    • Post n°1

    FM2-A insert Empty FM2-A insert

    Post by baddog1946 Thu Sep 30, 2010 8:21 pm

    Hi Bob:
    I have a couple of questions for you. Does the FM2-A insert convert the tuner to a stereo or is it just an amp?
    The second question is how hard are the inserts to find? I have a chance to buy a mono tuner that was stored for many years and is in almost new condition. It not even dusty inside. I am thinking of it for a restoration if it becomes a stereo tuner with the insert.
    BTW your new amp schematic is a very elegant and simple design design. I admire your work on that one.
    cheers
    Baddog1946
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    Bob Latino
    Bob Latino
    Bob Latino
    Admin


    Posts : 3262
    Join date : 2008-11-26
    Location : Massachusetts
    • Post n°2

    FM2-A insert Empty Re: FM2-A insert

    Post by Bob Latino Thu Sep 30, 2010 9:26 pm

    baddog1946 wrote:Hi Bob:
    I have a couple of questions for you. Does the FM2-A insert convert the tuner to a stereo or is it just an amp?
    The second question is how hard are the inserts to find? I have a chance to buy a mono tuner that was stored for many years and is in almost new condition. It not even dusty inside. I am thinking of it for a restoration if it becomes a stereo tuner with the insert.
    BTW your new amp schematic is a very elegant and simple design design. I admire your work on that one.
    cheers
    Baddog1946

    Hi Baddog,

    The FM2-A insert is a single channel power amplifier similar to one channel of an ST-35 power amp. The FM2-A converts the FM-1 to a "tuner-amplifier" or a mono receiver. It does not convert the FM-1 mono tuner to a stereo tuner. There was a conversion kit called the Dynaco FMX-3 that converted a Dynaco FM-1 mono tuner to a stereo tuner equivalent to the Dynaco FM-3 stereo tuner. Both the FM2-A and the FMX-3 are almost impossible to find but I have seen one or the other pop up on Ebay every now and then. If anyone viewing this post is a Dynaco buff, you can read about both at the two links below which go to copies of the original manuals (in pdf format) for each unit.

    FM2-A insert amplifier manual for the Dynaco FM-1

    FMX-3 stereo multiplex conversion manual

    Bob
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